Table of contents
- Introduction
- Type Conversion
- Mathematical Functions
- Date and Time Functions
- ADDDATE
- ADDTIME
- CONVERT_TZ
- CURDATE
- CURRENT_DATE
- CURRENT_TIME
- CURRENT_TIMESTAMP
- CURTIME
- DATE
- DATETIME
- DATE_ADD
- DATE_FORMAT
- DATE_SUB
- DATEDIFF
- DAY
- DAYNAME
- DAYOFMONTH
- DAY_OF_MONTH
- DAYOFWEEK
- DAYOFYEAR
- DAY_OF_YEAR
- EXTRACT
- FROM_DAYS
- FROM_UNIXTIME
- GET_FORMAT
- HOUR
- LAST_DAY
- LOCALTIMESTAMP
- LOCALTIME
- MAKEDATE
- MAKETIME
- MICROSECOND
- MINUTE
- MINUTE_OF_DAY
- MONTH
- MONTHNAME
- NOW
- PERIOD_ADD
- PERIOD_DIFF
- QUARTER
- SEC_TO_TIME
- SECOND
- STR_TO_DATE
- SUBDATE
- SUBTIME
- SYSDATE
- TIME
- TIME_FORMAT
- TIME_TO_SEC
- TIMEDIFF
- TIMESTAMP
- TIMESTAMPADD
- TIMESTAMPDIFF
- TO_DAYS
- TO_SECONDS
- UNIX_TIMESTAMP
- UTC_DATE
- UTC_TIME
- UTC_TIMESTAMP
- WEEK
- WEEKDAY
- WEEK_OF_YEAR
- WEEKOFYEAR
- YEAR
- YEARWEEK
- String Functions
- Conditional Functions
- RELEVANCE
- System Functions
There is support for a wide variety of functions shared by SQL/PPL. We are intend to generate this part of documentation automatically from our type system. However, the type system is missing descriptive information for now. So only formal specifications of all functions supported are listed at the moment. More details will be added in future.
Most of the specifications can be self explained just as a regular function with data type as argument. The only notation that needs elaboration is generic type T which binds to an actual type and can be used as return type. For example, ABS(NUMBER T) -> T means function ABS accepts an numerical argument of type T which could be any sub-type of NUMBER type and returns the actual type of T as return type. The actual type binds to generic type at runtime dynamically.
Usage: cast(expr as dateType) cast the expr to dataType. return the value of dataType. The following conversion rules are used:
| Src/Target | STRING | NUMBER | BOOLEAN | TIMESTAMP | DATE | TIME |
| STRING | Note1 | Note1 | TIMESTAMP() | DATE() | TIME() | |
| NUMBER | Note1 | v!=0 | N/A | N/A | N/A | |
| BOOLEAN | Note1 | v?1:0 | N/A | N/A | N/A | |
| TIMESTAMP | Note1 | N/A | N/A | DATE() | TIME() | |
| DATE | Note1 | N/A | N/A | N/A | N/A | |
| TIME | Note1 | N/A | N/A | N/A | N/A |
Note1: the conversion follow the JDK specification.
Cast to string example:
os> SELECT cast(true as string) as cbool, cast(1 as string) as cint, cast(DATE '2012-08-07' as string) as cdate fetched rows / total rows = 1/1 +-------+------+------------+ | cbool | cint | cdate | |-------+------+------------| | true | 1 | 2012-08-07 | +-------+------+------------+
Cast to number example:
os> SELECT cast(true as int) as cbool, cast('1' as integer) as cstring
fetched rows / total rows = 1/1
+-------+---------+
| cbool | cstring |
|-------+---------|
| 1 | 1 |
+-------+---------+
Cast to date example:
os> SELECT cast('2012-08-07' as date) as cdate, cast('01:01:01' as time) as ctime, cast('2012-08-07 01:01:01' as timestamp) as ctimestamp
fetched rows / total rows = 1/1
+------------+----------+---------------------+
| cdate | ctime | ctimestamp |
|------------+----------+---------------------|
| 2012-08-07 | 01:01:01 | 2012-08-07 01:01:01 |
+------------+----------+---------------------+
Cast function can be chained:
os> SELECT cast(cast(true as string) as boolean) as cbool fetched rows / total rows = 1/1 +-------+ | cbool | |-------| | True | +-------+
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: same as argument type.
Example:
os> SELECT ABS(0), ABS(10), ABS(-10), ABS(12.34567), ABS(-12.34567) fetched rows / total rows = 1/1 +--------+---------+----------+---------------+----------------+ | ABS(0) | ABS(10) | ABS(-10) | ABS(12.34567) | ABS(-12.34567) | |--------+---------+----------+---------------+----------------| | 0 | 10 | 10 | 12.34567 | 12.34567 | +--------+---------+----------+---------------+----------------+
Usage: acos(x) calculate the arc cosine of x. Returns NULL if x is not in the range -1 to 1.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT ACOS(0) fetched rows / total rows = 1/1 +--------------------+ | ACOS(0) | |--------------------| | 1.5707963267948966 | +--------------------+
Usage: add(x, y) calculates x plus y.
Argument type: BYTE/SHORT/INTEGER/LONG/FLOAT/DOUBLE
Return type: Wider number between x and y
Synonyms: Addition Symbol (+)
Example:
os> SELECT ADD(2, 1), ADD(2.5, 3); fetched rows / total rows = 1/1 +-----------+-------------+ | ADD(2, 1) | ADD(2.5, 3) | |-----------+-------------| | 3 | 5.5 | +-----------+-------------+
Usage: asin(x) calculate the arc sine of x. Returns NULL if x is not in the range -1 to 1.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT ASIN(0) fetched rows / total rows = 1/1 +---------+ | ASIN(0) | |---------| | 0.0 | +---------+
Usage: atan(x) calculates the arc tangent of x. atan(y, x) calculates the arc tangent of y / x, except that the signs of both arguments are used to determine the quadrant of the result.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT ATAN(2), ATAN(2, 3) fetched rows / total rows = 1/1 +--------------------+--------------------+ | ATAN(2) | ATAN(2, 3) | |--------------------+--------------------| | 1.1071487177940904 | 0.5880026035475675 | +--------------------+--------------------+
Usage: atan2(y, x) calculates the arc tangent of y / x, except that the signs of both arguments are used to determine the quadrant of the result.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT ATAN2(2, 3) fetched rows / total rows = 1/1 +--------------------+ | ATAN2(2, 3) | |--------------------| | 0.5880026035475675 | +--------------------+
Usage: CBRT(number) calculates the cube root of a number
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
INTEGER/LONG/FLOAT/DOUBLE -> DOUBLE
Example:
os> SELECT CBRT(8), CBRT(9.261), CBRT(-27); fetched rows / total rows = 1/1 +---------+-------------+-----------+ | CBRT(8) | CBRT(9.261) | CBRT(-27) | |---------+-------------+-----------| | 2.0 | 2.1 | -3.0 | +---------+-------------+-----------+
An alias for CEILING function.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: INTEGER
Specifications:
Note: CEIL and CEILING functions have the same implementation & functionality
Limitation: CEILING only works as expected when IEEE 754 double type displays decimal when stored.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: LONG
Example:
os> SELECT CEILING(0), CEILING(50.00005), CEILING(-50.00005); fetched rows / total rows = 1/1 +------------+-------------------+--------------------+ | CEILING(0) | CEILING(50.00005) | CEILING(-50.00005) | |------------+-------------------+--------------------| | 0 | 51 | -50 | +------------+-------------------+--------------------+ os> SELECT CEILING(3147483647.12345), CEILING(113147483647.12345), CEILING(3147483647.00001); fetched rows / total rows = 1/1 +---------------------------+-----------------------------+---------------------------+ | CEILING(3147483647.12345) | CEILING(113147483647.12345) | CEILING(3147483647.00001) | |---------------------------+-----------------------------+---------------------------| | 3147483648 | 113147483648 | 3147483648 | +---------------------------+-----------------------------+---------------------------+
Example:
os> SELECT CEIL(0), CEIL(12.34567), CEIL(-12.34567) fetched rows / total rows = 1/1 +---------+----------------+-----------------+ | CEIL(0) | CEIL(12.34567) | CEIL(-12.34567) | |---------+----------------+-----------------| | 0 | 13 | -12 | +---------+----------------+-----------------+
Usage: CONV(x, a, b) converts the number x from a base to b base.
Argument type: x: STRING, a: INTEGER, b: INTEGER
Return type: STRING
Example:
os> SELECT CONV('12', 10, 16), CONV('2C', 16, 10), CONV(12, 10, 2), CONV(1111, 2, 10)
fetched rows / total rows = 1/1
+--------------------+--------------------+-----------------+-------------------+
| CONV('12', 10, 16) | CONV('2C', 16, 10) | CONV(12, 10, 2) | CONV(1111, 2, 10) |
|--------------------+--------------------+-----------------+-------------------|
| c | 44 | 1100 | 15 |
+--------------------+--------------------+-----------------+-------------------+
Usage: cos(x) calculate the cosine of x, where x is given in radians.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT COS(0) fetched rows / total rows = 1/1 +--------+ | COS(0) | |--------| | 1.0 | +--------+
Usage: cosh(x) calculates the hyperbolic cosine of x, defined as (((e^x) + (e^(-x))) / 2)
Argument type: BYTE/SHORT/INTEGER/LONG/FLOAT/DOUBLE
Return Type: DOUBLE
Example:
os> SELECT COSH(2), COSH(1.5) fetched rows / total rows = 1/1 +--------------------+-------------------+ | COSH(2) | COSH(1.5) | |--------------------+-------------------| | 3.7621956910836314 | 2.352409615243247 | +--------------------+-------------------+
Usage: cot(x) calculate the cotangent of x. Returns out-of-range error if x equals to 0.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT COT(1) fetched rows / total rows = 1/1 +--------------------+ | COT(1) | |--------------------| | 0.6420926159343306 | +--------------------+
Usage: Calculates a cyclic redundancy check value and returns a 32-bit unsigned value.
Argument type: STRING
Return type: LONG
Example:
os> SELECT CRC32('MySQL')
fetched rows / total rows = 1/1
+----------------+
| CRC32('MySQL') |
|----------------|
| 3259397556 |
+----------------+
Usage: degrees(x) converts x from radians to degrees.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT DEGREES(1.57) fetched rows / total rows = 1/1 +-------------------+ | DEGREES(1.57) | |-------------------| | 89.95437383553924 | +-------------------+
Usage: divide(x, y) calculates x divided by y.
Argument type: BYTE/SHORT/INTEGER/LONG/FLOAT/DOUBLE
Return type: Wider number between x and y
Synonyms: Division Symbol (/)
Example:
os> SELECT DIVIDE(10, 2), DIVIDE(7.5, 3); fetched rows / total rows = 1/1 +---------------+----------------+ | DIVIDE(10, 2) | DIVIDE(7.5, 3) | |---------------+----------------| | 5 | 2.5 | +---------------+----------------+
Usage: E() returns the Euler's number
Return type: DOUBLE
Example:
os> SELECT E() fetched rows / total rows = 1/1 +-------------------+ | E() | |-------------------| | 2.718281828459045 | +-------------------+
Usage: EXP() returns Euler's number raised to the specified number.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT EXP(2) fetched rows / total rows = 1/1 +------------------+ | EXP(2) | |------------------| | 7.38905609893065 | +------------------+
Usage: EXPM1(NUMBER T) returns the exponential of T, minus 1.
e^{X} - 1
See also EXP.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT EXPM1(-1), EXPM1(0), EXPM1(1), EXPM1(1.5) fetched rows / total rows = 1/1 +---------------------+----------+-------------------+-------------------+ | EXPM1(-1) | EXPM1(0) | EXPM1(1) | EXPM1(1.5) | |---------------------+----------+-------------------+-------------------| | -0.6321205588285577 | 0.0 | 1.718281828459045 | 3.481689070338065 | +---------------------+----------+-------------------+-------------------+
Usage: FLOOR(T) takes the floor of value T.
Limitation: FLOOR only works as expected when IEEE 754 double type displays decimal when stored.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: LONG
Example:
os> SELECT FLOOR(0), FLOOR(50.00005), FLOOR(-50.00005); fetched rows / total rows = 1/1 +----------+-----------------+------------------+ | FLOOR(0) | FLOOR(50.00005) | FLOOR(-50.00005) | |----------+-----------------+------------------| | 0 | 50 | -51 | +----------+-----------------+------------------+ os> SELECT FLOOR(3147483647.12345), FLOOR(113147483647.12345), FLOOR(3147483647.00001); fetched rows / total rows = 1/1 +-------------------------+---------------------------+-------------------------+ | FLOOR(3147483647.12345) | FLOOR(113147483647.12345) | FLOOR(3147483647.00001) | |-------------------------+---------------------------+-------------------------| | 3147483647 | 113147483647 | 3147483647 | +-------------------------+---------------------------+-------------------------+ os> SELECT FLOOR(282474973688888.022), FLOOR(9223372036854775807.022), FLOOR(9223372036854775807.0000001); fetched rows / total rows = 1/1 +----------------------------+--------------------------------+------------------------------------+ | FLOOR(282474973688888.022) | FLOOR(9223372036854775807.022) | FLOOR(9223372036854775807.0000001) | |----------------------------+--------------------------------+------------------------------------| | 282474973688888 | 9223372036854775807 | 9223372036854775807 | +----------------------------+--------------------------------+------------------------------------+
Returns the natural logarithm of X; that is, the base-e logarithm of X. If X is NULL or less than or equal to 0, the function returns NULL.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> select LN(1), LN(e()), LN(10), LN(12.34567); fetched rows / total rows = 1/1 +-------+---------+-------------------+--------------------+ | LN(1) | LN(e()) | LN(10) | LN(12.34567) | |-------+---------+-------------------+--------------------| | 0.0 | 1.0 | 2.302585092994046 | 2.5133053943094317 | +-------+---------+-------------------+--------------------+
If called with one parameter, this function returns the natural logarithm of X (see LN). If called with two parameters, this function returns the logarithm of X to the base B. The inverse of this function (when called with a single argument) is the EXP function. If X is NULL or less than or equal to 0, or if B is NULL or less than or equal to 1, then NULL is returned.
Argument 1 type: INTEGER/LONG/FLOAT/DOUBLE Argument 2 type (optional): INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> select LOG(1), LOG(e()), LOG(2, 65536), LOG(10, 10000); fetched rows / total rows = 1/1 +--------+----------+---------------+----------------+ | LOG(1) | LOG(e()) | LOG(2, 65536) | LOG(10, 10000) | |--------+----------+---------------+----------------| | 0.0 | 1.0 | 16.0 | 4.0 | +--------+----------+---------------+----------------+
Returns the base-2 logarithm of X. If X is NULL or less than or equal to 0, the function returns NULL. LOG2(X) is useful for finding out how many bits a number requires for storage and equal to LOG(2, X).
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> select LOG2(1), LOG2(8), LOG2(65536), LOG2(8.8245); fetched rows / total rows = 1/1 +---------+---------+-------------+--------------------+ | LOG2(1) | LOG2(8) | LOG2(65536) | LOG2(8.8245) | |---------+---------+-------------+--------------------| | 0.0 | 3.0 | 16.0 | 3.1415145369723745 | +---------+---------+-------------+--------------------+
Returns the base-10 logarithm of X. If X is NULL or less than or equal to 0, the function returns NULL. LOG10(X) is equal to LOG(10, X).
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> select LOG10(1), LOG10(8), LOG10(1000), LOG10(8.8245); fetched rows / total rows = 1/1 +----------+--------------------+-------------+--------------------+ | LOG10(1) | LOG10(8) | LOG10(1000) | LOG10(8.8245) | |----------+--------------------+-------------+--------------------| | 0.0 | 0.9030899869919435 | 3.0 | 0.9456901074431278 | +----------+--------------------+-------------+--------------------+
Usage: MOD(x, y) calculates the remainder of the number x divided by y.
Argument type: BYTE/SHORT/INTEGER/LONG/FLOAT/DOUBLE
Return type: Wider number between x and y. If y equals to 0, then returns NULL.
Synonyms: Modulus Symbol (%), MODULUS
Example:
os> SELECT MOD(3, 2), MOD(3.1, 2) fetched rows / total rows = 1/1 +-----------+-------------+ | MOD(3, 2) | MOD(3.1, 2) | |-----------+-------------| | 1 | 1.1 | +-----------+-------------+
Usage: MODULUS(x, y) calculates the remainder of the number x divided by y.
Argument type: BYTE/SHORT/INTEGER/LONG/FLOAT/DOUBLE
Return type: Wider number between x and y. If y equals to 0, then returns NULL.
Synonyms: Modulus Symbol (%), MOD
Example:
os> SELECT MODULUS(3, 2), MODULUS(3.1, 2) fetched rows / total rows = 1/1 +---------------+-----------------+ | MODULUS(3, 2) | MODULUS(3.1, 2) | |---------------+-----------------| | 1 | 1.1 | +---------------+-----------------+
Usage: MULTIPLY(x, y) calculates the multiplication of x and y.
Argument type: BYTE/SHORT/INTEGER/LONG/FLOAT/DOUBLE
Return type: Wider number between x and y. If y equals to 0, then returns NULL.
Synonyms: Multiplication Symbol (*)
Example:
os> SELECT MULTIPLY(1, 2), MULTIPLY(-2, 1), MULTIPLY(1.5, 2); fetched rows / total rows = 1/1 +----------------+-----------------+------------------+ | MULTIPLY(1, 2) | MULTIPLY(-2, 1) | MULTIPLY(1.5, 2) | |----------------+-----------------+------------------| | 2 | -2 | 3.0 | +----------------+-----------------+------------------+
Usage: PI() returns the constant pi
Return type: DOUBLE
Example:
os> SELECT PI() fetched rows / total rows = 1/1 +-------------------+ | PI() | |-------------------| | 3.141592653589793 | +-------------------+
Usage: POW(x, y) calculates the value of x raised to the power of y. Bad inputs return NULL result.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Synonyms: POWER
Example:
os> SELECT POW(3, 2), POW(-3, 2), POW(3, -2) fetched rows / total rows = 1/1 +-----------+------------+--------------------+ | POW(3, 2) | POW(-3, 2) | POW(3, -2) | |-----------+------------+--------------------| | 9.0 | 9.0 | 0.1111111111111111 | +-----------+------------+--------------------+
Usage: POWER(x, y) calculates the value of x raised to the power of y. Bad inputs return NULL result.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Synonyms: POW
Example:
os> SELECT POWER(3, 2), POWER(-3, 2), POWER(3, -2) fetched rows / total rows = 1/1 +-------------+--------------+--------------------+ | POWER(3, 2) | POWER(-3, 2) | POWER(3, -2) | |-------------+--------------+--------------------| | 9.0 | 9.0 | 0.1111111111111111 | +-------------+--------------+--------------------+
Usage: radians(x) converts x from degrees to radians.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT RADIANS(90) fetched rows / total rows = 1/1 +--------------------+ | RADIANS(90) | |--------------------| | 1.5707963267948966 | +--------------------+
Usage: RAND()/RAND(N) returns a random floating-point value in the range 0 <= value < 1.0. If integer N is specified, the seed is initialized prior to execution. One implication of this behavior is with identical argument N, rand(N) returns the same value each time, and thus produces a repeatable sequence of column values.
Argument type: INTEGER
Return type: FLOAT
Example:
os> SELECT RAND(3) fetched rows / total rows = 1/1 +------------+ | RAND(3) | |------------| | 0.73105735 | +------------+
Usage: RINT(NUMBER T) returns T rounded to the closest whole integer number
Argument type: BYTE/SHORT/INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT RINT(1.7); fetched rows / total rows = 1/1 +-----------+ | RINT(1.7) | |-----------| | 2.0 | +-----------+
Usage: ROUND(x, d) rounds the argument x to d decimal places, d defaults to 0 if not specified.
Argument 1 type: INTEGER/LONG/FLOAT/DOUBLE Argument 2 type (optional): INTEGER
Return type map:
(INTEGER/LONG[, INTEGER]) -> LONG (FLOAT/DOUBLE[, INTEGER]) -> DOUBLE
Example:
os> SELECT ROUND(12.34), ROUND(12.34, 1), ROUND(12.34, -1), ROUND(12, 1) fetched rows / total rows = 1/1 +--------------+-----------------+------------------+--------------+ | ROUND(12.34) | ROUND(12.34, 1) | ROUND(12.34, -1) | ROUND(12, 1) | |--------------+-----------------+------------------+--------------| | 12.0 | 12.3 | 10.0 | 12 | +--------------+-----------------+------------------+--------------+
Usage: Returns the sign of the argument as -1, 0, or 1, depending on whether the number is negative, zero, or positive
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: INTEGER
Example:
os> SELECT SIGN(1), SIGN(0), SIGN(-1.1) fetched rows / total rows = 1/1 +---------+---------+------------+ | SIGN(1) | SIGN(0) | SIGN(-1.1) | |---------+---------+------------| | 1 | 0 | -1 | +---------+---------+------------+
Usage: Returns the sign of the argument as -1, 0, or 1, depending on whether the number is negative, zero, or positive
Argument type: BYTE/SHORT/INTEGER/LONG/FLOAT/DOUBLE
Return type: INTEGER
Synonyms: SIGN
Example:
os> SELECT SIGNUM(1), SIGNUM(0), SIGNUM(-1.1) fetched rows / total rows = 1/1 +-----------+-----------+--------------+ | SIGNUM(1) | SIGNUM(0) | SIGNUM(-1.1) | |-----------+-----------+--------------| | 1 | 0 | -1 | +-----------+-----------+--------------+
Usage: sin(x) calculate the sine of x, where x is given in radians.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> select sin(0), sin(1), sin(pi()), abs(sin(pi())) < 0.0001; fetched rows / total rows = 1/1 +--------+--------------------+------------------------+-------------------------+ | sin(0) | sin(1) | sin(pi()) | abs(sin(pi())) < 0.0001 | |--------+--------------------+------------------------+-------------------------| | 0.0 | 0.8414709848078965 | 1.2246467991473532e-16 | True | +--------+--------------------+------------------------+-------------------------+
Usage: sinh(x) calculate the hyperbolic sine of x, defined as (((e^x) - (e^(-x))) / 2)
Argument type: BYTE/SHORT/INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT SINH(2), SINH(1.5) fetched rows / total rows = 1/1 +-------------------+--------------------+ | SINH(2) | SINH(1.5) | |-------------------+--------------------| | 3.626860407847019 | 2.1292794550948173 | +-------------------+--------------------+
Usage: Calculates the square root of a non-negative number
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type map:
(Non-negative) INTEGER/LONG/FLOAT/DOUBLE -> DOUBLE (Negative) INTEGER/LONG/FLOAT/DOUBLE -> NULL
Example:
os> SELECT SQRT(4), SQRT(4.41) fetched rows / total rows = 1/1 +---------+------------+ | SQRT(4) | SQRT(4.41) | |---------+------------| | 2.0 | 2.1 | +---------+------------+
Usage: strcmp(str1, str2) returns 0 if strings are same, -1 if first arg < second arg according to current sort order, and 1 otherwise.
Argument type: STRING, STRING
Return type: INTEGER
Example:
os> SELECT STRCMP('hello', 'world'), STRCMP('hello', 'hello')
fetched rows / total rows = 1/1
+--------------------------+--------------------------+
| STRCMP('hello', 'world') | STRCMP('hello', 'hello') |
|--------------------------+--------------------------|
| -1 | 0 |
+--------------------------+--------------------------+
Usage: subtract(x, y) calculates x minus y.
Argument type: BYTE/SHORT/INTEGER/LONG/FLOAT/DOUBLE
Return type: Wider number between x and y
Synonyms: Subtraction Symbol (-)
Example:
os> SELECT SUBTRACT(2, 1), SUBTRACT(2.5, 3); fetched rows / total rows = 1/1 +----------------+------------------+ | SUBTRACT(2, 1) | SUBTRACT(2.5, 3) | |----------------+------------------| | 1 | -0.5 | +----------------+------------------+
Usage: tan(x) calculate the tangent of x, where x is given in radians.
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type: DOUBLE
Example:
os> SELECT TAN(0) fetched rows / total rows = 1/1 +--------+ | TAN(0) | |--------| | 0.0 | +--------+
Usage: TRUNCATE(x, d) returns the number x, truncated to d decimal place
Argument type: INTEGER/LONG/FLOAT/DOUBLE
Return type map:
INTEGER/LONG -> LONG FLOAT/DOUBLE -> DOUBLE
Example:
fetched rows / total rows = 1/1 +--------------------+---------------------+-----------------+ | TRUNCATE(56.78, 1) | TRUNCATE(56.78, -1) | TRUNCATE(56, 1) | |--------------------+---------------------+-----------------| | 56.7 | 50 | 56 | +--------------------+---------------------+-----------------+
Usage: adddate(date, INTERVAL expr unit)/ adddate(date, expr) adds the time interval of second argument to date; adddate(date, days) adds the second argument as integer number of days to date. If first argument is TIME, today's date is used; if first argument is DATE, time at midnight is used.
Argument type: DATE/TIMESTAMP/TIME, INTERVAL/LONG
Return type map:
(DATE/TIMESTAMP/TIME, INTERVAL) -> TIMESTAMP
(DATE, LONG) -> DATE
(TIMESTAMP/TIME, LONG) -> TIMESTAMP
Synonyms: DATE_ADD when invoked with the INTERVAL form of the second argument.
Antonyms: SUBDATE
Example:
os> SELECT ADDDATE(DATE('2020-08-26'), INTERVAL 1 HOUR) AS `'2020-08-26' + 1h`, ADDDATE(DATE('2020-08-26'), 1) AS `'2020-08-26' + 1`, ADDDATE(TIMESTAMP('2020-08-26 01:01:01'), 1) AS `ts '2020-08-26 01:01:01' + 1`
fetched rows / total rows = 1/1
+---------------------+------------------+------------------------------+
| '2020-08-26' + 1h | '2020-08-26' + 1 | ts '2020-08-26 01:01:01' + 1 |
|---------------------+------------------+------------------------------|
| 2020-08-26 01:00:00 | 2020-08-27 | 2020-08-27 01:01:01 |
+---------------------+------------------+------------------------------+
Usage: addtime(expr1, expr2) adds expr2 to expr1 and returns the result. If argument is TIME, today's date is used; if argument is DATE, time at midnight is used.
Argument type: DATE/TIMESTAMP/TIME, DATE/TIMESTAMP/TIME
Return type map:
(DATE/TIMESTAMP, DATE/TIMESTAMP/TIME) -> TIMESTAMP
(TIME, DATE/TIMESTAMP/TIME) -> TIME
Antonyms: SUBTIME
Example:
os> SELECT ADDTIME(DATE('2008-12-12'), DATE('2008-11-15')) AS `'2008-12-12' + 0 `
fetched rows / total rows = 1/1
+---------------------+
| '2008-12-12' + 0 |
|---------------------|
| 2008-12-12 00:00:00 |
+---------------------+
os> SELECT ADDTIME(TIME('23:59:59'), DATE('2004-01-01')) AS `'23:59:59' + 0`
fetched rows / total rows = 1/1
+----------------+
| '23:59:59' + 0 |
|----------------|
| 23:59:59 |
+----------------+
os> SELECT ADDTIME(DATE('2004-01-01'), TIME('23:59:59')) AS `'2004-01-01' + '23:59:59'`
fetched rows / total rows = 1/1
+---------------------------+
| '2004-01-01' + '23:59:59' |
|---------------------------|
| 2004-01-01 23:59:59 |
+---------------------------+
os> SELECT ADDTIME(TIME('10:20:30'), TIME('00:05:42')) AS `'10:20:30' + '00:05:42'`
fetched rows / total rows = 1/1
+-------------------------+
| '10:20:30' + '00:05:42' |
|-------------------------|
| 10:26:12 |
+-------------------------+
os> SELECT ADDTIME(TIMESTAMP('2007-02-28 10:20:30'), TIMESTAMP('2002-03-04 20:40:50')) AS `'2007-02-28 10:20:30' + '20:40:50'`
fetched rows / total rows = 1/1
+------------------------------------+
| '2007-02-28 10:20:30' + '20:40:50' |
|------------------------------------|
| 2007-03-01 07:01:20 |
+------------------------------------+
Usage: convert_tz(timestamp, from_timezone, to_timezone) constructs a timestamp object converted from the from_timezone to the to_timezone.
Argument type: TIMESTAMP, STRING, STRING
Return type: TIMESTAMP
Example:
os> SELECT CONVERT_TZ('2008-12-25 05:30:00', '+00:00', 'America/Los_Angeles')
fetched rows / total rows = 1/1
+--------------------------------------------------------------------+
| CONVERT_TZ('2008-12-25 05:30:00', '+00:00', 'America/Los_Angeles') |
|--------------------------------------------------------------------|
| 2008-12-24 21:30:00 |
+--------------------------------------------------------------------+
os> SELECT CONVERT_TZ("2010-10-10 10:10:10", "+01:00", "-10:00")
fetched rows / total rows = 1/1
+-------------------------------------------------------+
| CONVERT_TZ("2010-10-10 10:10:10", "+01:00", "-10:00") |
|-------------------------------------------------------|
| 2010-10-09 23:10:10 |
+-------------------------------------------------------+
When the datedate, or either of the two time zone fields are invalid format, then the result is null. In this example any timestamp that is not <yyyy-MM-dd HH:mm:ss> will result in null. Example:
os> SELECT CONVERT_TZ("test", "+01:00", "-10:00")
fetched rows / total rows = 1/1
+----------------------------------------+
| CONVERT_TZ("test", "+01:00", "-10:00") |
|----------------------------------------|
| null |
+----------------------------------------+
When the timestamp, or either of the two time zone fields are invalid format, then the result is null. In this example any timezone that is not <+HH:mm> or <-HH:mm> will result in null. Example:
os> SELECT CONVERT_TZ("2010-10-10 10:10:10", "test", "-10:00")
fetched rows / total rows = 1/1
+-----------------------------------------------------+
| CONVERT_TZ("2010-10-10 10:10:10", "test", "-10:00") |
|-----------------------------------------------------|
| null |
+-----------------------------------------------------+
The valid timezone range for convert_tz is (-13:59, +14:00) inclusive. Timezones outside of the range will result in null. Example:
os> SELECT CONVERT_TZ("2010-10-10 10:10:10", "+01:00", "+14:00")
fetched rows / total rows = 1/1
+-------------------------------------------------------+
| CONVERT_TZ("2010-10-10 10:10:10", "+01:00", "+14:00") |
|-------------------------------------------------------|
| 2010-10-10 23:10:10 |
+-------------------------------------------------------+
The valid timezone range for convert_tz is (-13:59, +14:00) inclusive. Timezones outside of the range will result in null. Example:
os> SELECT CONVERT_TZ("2010-10-10 10:10:10", "+01:00", "+14:01")
fetched rows / total rows = 1/1
+-------------------------------------------------------+
| CONVERT_TZ("2010-10-10 10:10:10", "+01:00", "+14:01") |
|-------------------------------------------------------|
| null |
+-------------------------------------------------------+
The valid timezone range for convert_tz is (-13:59, +14:00) inclusive. Timezones outside of the range will result in null. Example:
os> SELECT CONVERT_TZ("2010-10-10 10:10:10", "+01:00", "-13:59")
fetched rows / total rows = 1/1
+-------------------------------------------------------+
| CONVERT_TZ("2010-10-10 10:10:10", "+01:00", "-13:59") |
|-------------------------------------------------------|
| 2010-10-09 19:11:10 |
+-------------------------------------------------------+
The valid timezone range for convert_tz is (-13:59, +14:00) inclusive. Timezones outside of the range will result in null. Example:
os> SELECT CONVERT_TZ("2010-10-10 10:10:10", "+01:00", "-14:00")
fetched rows / total rows = 1/1
+-------------------------------------------------------+
| CONVERT_TZ("2010-10-10 10:10:10", "+01:00", "-14:00") |
|-------------------------------------------------------|
| null |
+-------------------------------------------------------+
Returns the current time as a value in 'YYYY-MM-DD'. CURDATE() returns the time at which it executes as SYSDATE() does.
Return type: DATE
Specification: CURDATE() -> DATE
Example:
> SELECT CURDATE(); fetched rows / total rows = 1/1 +------------+ | CURDATE() | |------------| | 2022-08-02 | +------------+
CURRENT_DATE() are synonyms for CURDATE().
Example:
> SELECT CURRENT_DATE(); fetched rows / total rows = 1/1 +----------------+ | CURRENT_DATE() | |----------------+ | 2022-08-02 | +----------------+
CURRENT_TIME() are synonyms for CURTIME().
Example:
> SELECT CURRENT_TIME(); fetched rows / total rows = 1/1 +----------------+ | CURRENT_TIME() | |----------------+ | 15:39:05 | +----------------+
CURRENT_TIMESTAMP() are synonyms for NOW().
Example:
> SELECT CURRENT_TIMESTAMP(); fetched rows / total rows = 1/1 +---------------------+ | CURRENT_TIMESTAMP() | |---------------------+ | 2022-08-02 15:54:19 | +---------------------+
Returns the current time as a value in 'hh:mm:ss'. CURTIME() returns the time at which the statement began to execute as NOW() does.
Return type: TIME
Specification: CURTIME() -> TIME
Example:
> SELECT CURTIME() as value_1, CURTIME() as value_2; fetched rows / total rows = 1/1 +----------+----------+ | value_1 | value_2 | |----------+----------| | 15:39:05 | 15:39:05 | +----------+----------+
Usage: date(expr) constructs a date type with the input string expr as a date. If the argument is of date/timestamp, it extracts the date value part from the expression.
Argument type: STRING/DATE/TIMESTAMP
Return type: DATE
Example:
os> SELECT DATE('2020-08-26'), DATE(TIMESTAMP('2020-08-26 13:49:00')), DATE('2020-08-26 13:49:00'), DATE('2020-08-26 13:49')
fetched rows / total rows = 1/1
+--------------------+----------------------------------------+-----------------------------+--------------------------+
| DATE('2020-08-26') | DATE(TIMESTAMP('2020-08-26 13:49:00')) | DATE('2020-08-26 13:49:00') | DATE('2020-08-26 13:49') |
|--------------------+----------------------------------------+-----------------------------+--------------------------|
| 2020-08-26 | 2020-08-26 | 2020-08-26 | 2020-08-26 |
+--------------------+----------------------------------------+-----------------------------+--------------------------+
Usage: datetime(timestamp)/ datetime(timestamp, to_timezone) Converts the timestamp to a new timezone
Argument type: TIMESTAMP/STRING
Return type map:
(TIMESTAMP, STRING) -> TIMESTAMP
(TIMESTAMP) -> TIMESTAMP
Example:
os> SELECT DATETIME('2008-12-25 05:30:00+00:00', 'America/Los_Angeles')
fetched rows / total rows = 1/1
+--------------------------------------------------------------+
| DATETIME('2008-12-25 05:30:00+00:00', 'America/Los_Angeles') |
|--------------------------------------------------------------|
| 2008-12-24 21:30:00 |
+--------------------------------------------------------------+
This example converts from -10:00 timezone to +10:00 timezone. Example:
os> SELECT DATETIME('2004-02-28 23:00:00-10:00', '+10:00')
fetched rows / total rows = 1/1
+-------------------------------------------------+
| DATETIME('2004-02-28 23:00:00-10:00', '+10:00') |
|-------------------------------------------------|
| 2004-02-29 19:00:00 |
+-------------------------------------------------+
This example uses the timezone -14:00, which is outside of the range -13:59 and +14:00. This results in a null value. Example:
os> SELECT DATETIME('2008-01-01 02:00:00', '-14:00')
fetched rows / total rows = 1/1
+-------------------------------------------+
| DATETIME('2008-01-01 02:00:00', '-14:00') |
|-------------------------------------------|
| null |
+-------------------------------------------+
February 30th is not a day, so it returns null. Example:
os> SELECT DATETIME('2008-02-30 02:00:00', '-00:00')
fetched rows / total rows = 1/1
+-------------------------------------------+
| DATETIME('2008-02-30 02:00:00', '-00:00') |
|-------------------------------------------|
| null |
+-------------------------------------------+
DATETIME(datetime) examples
DATETIME with no timezone specified does no conversion. Example:
os> SELECT DATETIME('2008-02-10 02:00:00')
fetched rows / total rows = 1/1
+---------------------------------+
| DATETIME('2008-02-10 02:00:00') |
|---------------------------------|
| 2008-02-10 02:00:00 |
+---------------------------------+
February 30th is not a day, so it returns null. Example:
os> SELECT DATETIME('2008-02-30 02:00:00')
fetched rows / total rows = 1/1
+---------------------------------+
| DATETIME('2008-02-30 02:00:00') |
|---------------------------------|
| null |
+---------------------------------+
DATETIME with a datetime and no seperate timezone to convert to returns the datetime object without a timezone. Example:
os> SELECT DATETIME('2008-02-10 02:00:00+04:00')
fetched rows / total rows = 1/1
+---------------------------------------+
| DATETIME('2008-02-10 02:00:00+04:00') |
|---------------------------------------|
| 2008-02-10 02:00:00 |
+---------------------------------------+
Usage: date_add(date, INTERVAL expr unit) adds the interval expr to date. If first argument is TIME, today's date is used; if first argument is DATE, time at midnight is used.
Argument type: DATE/TIMESTAMP/TIME, INTERVAL
Return type: TIMESTAMP
Synonyms: ADDDATE
Antonyms: DATE_SUB
Example:
os> SELECT DATE_ADD(DATE('2020-08-26'), INTERVAL 1 HOUR) AS `'2020-08-26' + 1h`, DATE_ADD(TIMESTAMP('2020-08-26 01:01:01'), INTERVAL 1 DAY) as `ts '2020-08-26 01:01:01' + 1d`
fetched rows / total rows = 1/1
+---------------------+-------------------------------+
| '2020-08-26' + 1h | ts '2020-08-26 01:01:01' + 1d |
|---------------------+-------------------------------|
| 2020-08-26 01:00:00 | 2020-08-27 01:01:01 |
+---------------------+-------------------------------+
Usage: date_format(date, format) formats the date argument using the specifiers in the format argument. If an argument of type TIME is provided, the local date is used.
| Specifier | Description |
|---|---|
| %a | Abbreviated weekday name (Sun..Sat) |
| %b | Abbreviated month name (Jan..Dec) |
| %c | Month, numeric (0..12) |
| %D | Day of the month with English suffix (0th, 1st, 2nd, 3rd, ...) |
| %d | Day of the month, numeric (00..31) |
| %e | Day of the month, numeric (0..31) |
| %f | Microseconds (000000..999999) |
| %H | Hour (00..23) |
| %h | Hour (01..12) |
| %I | Hour (01..12) |
| %i | Minutes, numeric (00..59) |
| %j | Day of year (001..366) |
| %k | Hour (0..23) |
| %l | Hour (1..12) |
| %M | Month name (January..December) |
| %m | Month, numeric (00..12) |
| %p | AM or PM |
| %r | Time, 12-hour (hh:mm:ss followed by AM or PM) |
| %S | Seconds (00..59) |
| %s | Seconds (00..59) |
| %T | Time, 24-hour (hh:mm:ss) |
| %U | Week (00..53), where Sunday is the first day of the week; WEEK() mode 0 |
| %u | Week (00..53), where Monday is the first day of the week; WEEK() mode 1 |
| %V | Week (01..53), where Sunday is the first day of the week; WEEK() mode 2; used with %X |
| %v | Week (01..53), where Monday is the first day of the week; WEEK() mode 3; used with %x |
| %W | Weekday name (Sunday..Saturday) |
| %w | Day of the week (0=Sunday..6=Saturday) |
| %X | Year for the week where Sunday is the first day of the week, numeric, four digits; used with %V |
| %x | Year for the week, where Monday is the first day of the week, numeric, four digits; used with %v |
| %Y | Year, numeric, four digits |
| %y | Year, numeric (two digits) |
| %% | A literal % character |
| %x | x, for any “x” not listed above |
| x | x, for any smallcase/uppercase alphabet except [aydmshiHIMYDSEL] |
Argument type: STRING/DATE/TIME/TIMESTAMP, STRING
Return type: STRING
Example:
os> SELECT DATE_FORMAT('1998-01-31 13:14:15.012345', '%T.%f'), DATE_FORMAT(TIMESTAMP('1998-01-31 13:14:15.012345'), '%Y-%b-%D %r')
fetched rows / total rows = 1/1
+----------------------------------------------------+---------------------------------------------------------------------+
| DATE_FORMAT('1998-01-31 13:14:15.012345', '%T.%f') | DATE_FORMAT(TIMESTAMP('1998-01-31 13:14:15.012345'), '%Y-%b-%D %r') |
|----------------------------------------------------+---------------------------------------------------------------------|
| 13:14:15.012345 | 1998-Jan-31st 01:14:15 PM |
+----------------------------------------------------+---------------------------------------------------------------------+
Usage: date_sub(date, INTERVAL expr unit) subtracts the interval expr from date. If first argument is TIME, today's date is used; if first argument is DATE, time at midnight is used.
Argument type: DATE/TIMESTAMP/TIME, INTERVAL
Return type: TIMESTAMP
Synonyms: SUBDATE
Antonyms: DATE_ADD
Example:
os> SELECT DATE_SUB(DATE('2008-01-02'), INTERVAL 31 DAY) AS `'2008-01-02' - 31d`, DATE_SUB(TIMESTAMP('2020-08-26 01:01:01'), INTERVAL 1 HOUR) AS `ts '2020-08-26 01:01:01' + 1h`
fetched rows / total rows = 1/1
+---------------------+-------------------------------+
| '2008-01-02' - 31d | ts '2020-08-26 01:01:01' + 1h |
|---------------------+-------------------------------|
| 2007-12-02 00:00:00 | 2020-08-26 00:01:01 |
+---------------------+-------------------------------+
Usage: Calculates the difference of date parts of the given values. If the first argument is time, today's date is used.
Argument type: DATE/TIMESTAMP/TIME, DATE/TIMESTAMP/TIME
Return type: LONG
Example:
os> SELECT DATEDIFF(TIMESTAMP('2000-01-02 00:00:00'), TIMESTAMP('2000-01-01 23:59:59')) AS `'2000-01-02' - '2000-01-01'`, DATEDIFF(DATE('2001-02-01'), TIMESTAMP('2004-01-01 00:00:00')) AS `'2001-02-01' - '2004-01-01'`, DATEDIFF(TIME('23:59:59'), TIME('00:00:00')) AS `today - today`
fetched rows / total rows = 1/1
+-----------------------------+-----------------------------+---------------+
| '2000-01-02' - '2000-01-01' | '2001-02-01' - '2004-01-01' | today - today |
|-----------------------------+-----------------------------+---------------|
| 1 | -1064 | 0 |
+-----------------------------+-----------------------------+---------------+
Usage: day(date) extracts the day of the month for date, in the range 1 to 31.
Argument type: STRING/DATE/TIME/TIMESTAMP
Return type: INTEGER
Synonyms: DAYOFMONTH, DAY_OF_MONTH
Example:
os> SELECT DAY(DATE('2020-08-26'))
fetched rows / total rows = 1/1
+-------------------------+
| DAY(DATE('2020-08-26')) |
|-------------------------|
| 26 |
+-------------------------+
Usage: dayname(date) returns the name of the weekday for date, including Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday.
Argument type: STRING/DATE/TIMESTAMP
Return type: STRING
Example:
os> SELECT DAYNAME(DATE('2020-08-26'))
fetched rows / total rows = 1/1
+-----------------------------+
| DAYNAME(DATE('2020-08-26')) |
|-----------------------------|
| Wednesday |
+-----------------------------+
Usage: dayofmonth(date) extracts the day of the month for date, in the range 1 to 31.
Argument type: STRING/DATE/TIME/TIMESTAMP
Return type: INTEGER
Synonyms: DAY, DAY_OF_MONTH
Example:
os> SELECT DAYOFMONTH(DATE('2020-08-26'))
fetched rows / total rows = 1/1
+--------------------------------+
| DAYOFMONTH(DATE('2020-08-26')) |
|--------------------------------|
| 26 |
+--------------------------------+
Usage: day_of_month(date) extracts the day of the month for date, in the range 1 to 31.
Argument type: STRING/DATE/TIME/TIMESTAMP
Return type: INTEGER
Synonyms: DAY, DAYOFMONTH
Example:
os> SELECT DAY_OF_MONTH('2020-08-26')
fetched rows / total rows = 1/1
+----------------------------+
| DAY_OF_MONTH('2020-08-26') |
|----------------------------|
| 26 |
+----------------------------+
Usage: dayofweek(date) returns the weekday index for date (1 = Sunday, 2 = Monday, ..., 7 = Saturday).
The day_of_week function is also provided as an alias.
Argument type: STRING/DATE/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT DAYOFWEEK('2020-08-26'), DAY_OF_WEEK('2020-08-26')
fetched rows / total rows = 1/1
+-------------------------+---------------------------+
| DAYOFWEEK('2020-08-26') | DAY_OF_WEEK('2020-08-26') |
|-------------------------+---------------------------|
| 4 | 4 |
+-------------------------+---------------------------+
Usage: dayofyear(date) returns the day of the year for date, in the range 1 to 366. If an argument of type TIME is given, the function will use the current date. The function day_of_year is also provided as an alias.
Argument type: STRING/DATE/TIME/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT DAYOFYEAR(DATE('2020-08-26'))
fetched rows / total rows = 1/1
+-------------------------------+
| DAYOFYEAR(DATE('2020-08-26')) |
|-------------------------------|
| 239 |
+-------------------------------+
os> SELECT DAYOFYEAR(TIMESTAMP('2020-08-26 00:00:00'))
fetched rows / total rows = 1/1
+---------------------------------------------+
| DAYOFYEAR(TIMESTAMP('2020-08-26 00:00:00')) |
|---------------------------------------------|
| 239 |
+---------------------------------------------+
If an argument of type TIME is given, the function will use the current date. This function is an alias to the dayofyear function
Argument type: STRING/DATE/TIME/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT DAY_OF_YEAR(DATE('2020-08-26'))
fetched rows / total rows = 1/1
+---------------------------------+
| DAY_OF_YEAR(DATE('2020-08-26')) |
|---------------------------------|
| 239 |
+---------------------------------+
os> SELECT DAY_OF_YEAR(TIMESTAMP('2020-08-26 00:00:00'))
fetched rows / total rows = 1/1
+-----------------------------------------------+
| DAY_OF_YEAR(TIMESTAMP('2020-08-26 00:00:00')) |
|-----------------------------------------------|
| 239 |
+-----------------------------------------------+
Usage: extract(part FROM date) returns a LONG with digits in order according to the given 'part' arguments. The specific format of the returned long is determined by the table below.
Argument type: PART PART must be one of the following tokens in the table below.
The format specifiers found in this table are the same as those found in the DATE_FORMAT function.
| Part | Format |
|---|---|
| MICROSECOND | %f |
| SECOND | %s |
| MINUTE | %i |
| HOUR | %H |
| DAY | %d |
| WEEK | %X |
| MONTH | %m |
| YEAR | %V |
| SECOND_MICROSECOND | %s%f |
| MINUTE_MICROSECOND | %i%s%f |
| MINUTE_SECOND | %i%s |
| HOUR_MICROSECOND | %H%i%s%f |
| HOUR_SECOND | %H%i%s |
| HOUR_MINUTE | %H%i |
| DAY_MICROSECOND | %d%H%i%s%f |
| DAY_SECOND | %d%H%i%s |
| DAY_MINUTE | %d%H%i |
| DAY_HOUR | %d%H% |
| YEAR_MONTH | %V%m |
Return type: LONG
Example:
os> SELECT extract(YEAR_MONTH FROM "2023-02-07 10:11:12"); fetched rows / total rows = 1/1 +------------------------------------------------+ | extract(YEAR_MONTH FROM "2023-02-07 10:11:12") | |------------------------------------------------| | 202302 | +------------------------------------------------+
Usage: from_days(N) returns the date value given the day number N.
Argument type: INTEGER/LONG
Return type: DATE
Example:
os> SELECT FROM_DAYS(733687) fetched rows / total rows = 1/1 +-------------------+ | FROM_DAYS(733687) | |-------------------| | 2008-10-07 | +-------------------+
Usage: Returns a representation of the argument given as a timestamp or character string value. Perform reverse conversion for UNIX_TIMESTAMP function. If second argument is provided, it is used to format the result in the same way as the format string used for the DATE_FORMAT function. If timestamp is outside of range 1970-01-01 00:00:00 - 3001-01-18 23:59:59.999999 (0 to 32536771199.999999 epoch time), function returns NULL.
Argument type: DOUBLE, STRING
Return type map:
DOUBLE -> TIMESTAMP
DOUBLE, STRING -> STRING
Examples:
os> select FROM_UNIXTIME(1220249547) fetched rows / total rows = 1/1 +---------------------------+ | FROM_UNIXTIME(1220249547) | |---------------------------| | 2008-09-01 06:12:27 | +---------------------------+ os> select FROM_UNIXTIME(1220249547, '%T') fetched rows / total rows = 1/1 +---------------------------------+ | FROM_UNIXTIME(1220249547, '%T') | |---------------------------------| | 06:12:27 | +---------------------------------+
Usage: Returns a string value containing string format specifiers based on the input arguments.
Argument type: TYPE, STRING TYPE must be one of the following tokens: [DATE, TIME, TIMESTAMP]. STRING must be one of the following tokens: ["USA", "JIS", "ISO", "EUR", "INTERNAL"] (" can be replaced by ').
Examples:
os> select GET_FORMAT(DATE, 'USA'); fetched rows / total rows = 1/1 +-------------------------+ | GET_FORMAT(DATE, 'USA') | |-------------------------| | %m.%d.%Y | +-------------------------+
Usage: hour(time) extracts the hour value for time. Different from the time of day value, the time value has a large range and can be greater than 23, so the return value of hour(time) can be also greater than 23. The function hour_of_day is also provided as an alias.
Argument type: STRING/TIME/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT HOUR('01:02:03'), HOUR_OF_DAY('01:02:03')
fetched rows / total rows = 1/1
+------------------+-------------------------+
| HOUR('01:02:03') | HOUR_OF_DAY('01:02:03') |
|------------------+-------------------------|
| 1 | 1 |
+------------------+-------------------------+
Usage: Returns the last day of the month as a DATE for a valid argument.
Argument type: DATE/STRING/TIMESTAMP/TIME
Return type: DATE
Example:
os> SELECT last_day('2023-02-06');
fetched rows / total rows = 1/1
+------------------------+
| last_day('2023-02-06') |
|------------------------|
| 2023-02-28 |
+------------------------+
LOCALTIMESTAMP() are synonyms for NOW().
Example:
> SELECT LOCALTIMESTAMP(); fetched rows / total rows = 1/1 +---------------------+ | LOCALTIMESTAMP() | |---------------------+ | 2022-08-02 15:54:19 | +---------------------+
LOCALTIME() are synonyms for NOW().
Example:
> SELECT LOCALTIME(), LOCALTIME; fetched rows / total rows = 1/1 +---------------------+ | LOCALTIME() | |---------------------+ | 2022-08-02 15:54:19 | +---------------------+
Returns a date, given year and day-of-year values. dayofyear must be greater than 0 or the result is NULL. The result is also NULL if either argument is NULL. Arguments are rounded to an integer.
Limitations: - Zero year interpreted as 2000; - Negative year is not accepted; - day-of-year should be greater than zero; - day-of-year could be greater than 365/366, calculation switches to the next year(s) (see example).
Specifications:
- MAKEDATE(DOUBLE, DOUBLE) -> DATE
Argument type: DOUBLE
Return type: DATE
Example:
os> select MAKEDATE(1945, 5.9), MAKEDATE(1984, 1984) fetched rows / total rows = 1/1 +---------------------+----------------------+ | MAKEDATE(1945, 5.9) | MAKEDATE(1984, 1984) | |---------------------+----------------------| | 1945-01-06 | 1989-06-06 | +---------------------+----------------------+
Returns a time value calculated from the hour, minute, and second arguments. Returns NULL if any of its arguments are NULL. The second argument can have a fractional part, rest arguments are rounded to an integer.
Limitations: - 24-hour clock is used, available time range is [00:00:00.0 - 23:59:59.(9)]; - Up to 9 digits of second fraction part is taken (nanosecond precision).
Specifications:
- MAKETIME(DOUBLE, DOUBLE, DOUBLE) -> TIME
Argument type: DOUBLE
Return type: TIME
Example:
os> select MAKETIME(20, 30, 40), MAKETIME(20.2, 49.5, 42.100502) fetched rows / total rows = 1/1 +----------------------+---------------------------------+ | MAKETIME(20, 30, 40) | MAKETIME(20.2, 49.5, 42.100502) | |----------------------+---------------------------------| | 20:30:40 | 20:50:42.100502 | +----------------------+---------------------------------+
Usage: microsecond(expr) returns the microseconds from the time or timestamp expression expr as a number in the range from 0 to 999999.
Argument type: STRING/TIME/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT MICROSECOND((TIME '01:02:03.123456')) fetched rows / total rows = 1/1 +---------------------------------------+ | MICROSECOND((TIME '01:02:03.123456')) | |---------------------------------------| | 123456 | +---------------------------------------+
Usage: minute(time) returns the minute for time, in the range 0 to 59. The minute_of_hour function is provided as an alias.
Argument type: STRING/TIME/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT MINUTE(time('01:02:03')), MINUTE_OF_HOUR(time('01:02:03'))
fetched rows / total rows = 1/1
+--------------------------+----------------------------------+
| MINUTE(time('01:02:03')) | MINUTE_OF_HOUR(time('01:02:03')) |
|--------------------------+----------------------------------|
| 2 | 2 |
+--------------------------+----------------------------------+
Usage: minute_of_day(time) returns the minute value for time within a 24 hour day, in the range 0 to 1439.
Argument type: STRING/TIME/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT MINUTE_OF_DAY((TIME '01:02:03')) fetched rows / total rows = 1/1 +----------------------------------+ | MINUTE_OF_DAY((TIME '01:02:03')) | |----------------------------------| | 62 | +----------------------------------+
Usage: month(date) returns the month for date, in the range 1 to 12 for January to December. The dates with value 0 such as '0000-00-00' or '2008-00-00' are invalid. If an argument of type TIME is given, the function will use the current date. The function month_of_year is also provided as an alias.
Argument type: STRING/DATE/TIME/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT MONTH(DATE('2020-08-26'))
fetched rows / total rows = 1/1
+---------------------------+
| MONTH(DATE('2020-08-26')) |
|---------------------------|
| 8 |
+---------------------------+
os> SELECT MONTH_OF_YEAR(DATE('2020-08-26'))
fetched rows / total rows = 1/1
+-----------------------------------+
| MONTH_OF_YEAR(DATE('2020-08-26')) |
|-----------------------------------|
| 8 |
+-----------------------------------+
Usage: monthname(date) returns the full name of the month for date.
Argument type: STRING/DATE/TIMESTAMP
Return type: STRING
Example:
os> SELECT MONTHNAME(DATE('2020-08-26'))
fetched rows / total rows = 1/1
+-------------------------------+
| MONTHNAME(DATE('2020-08-26')) |
|-------------------------------|
| August |
+-------------------------------+
Returns the current date and time as a value in 'YYYY-MM-DD hh:mm:ss' format. The value is expressed in the cluster time zone. NOW() returns a constant time that indicates the time at which the statement began to execute. This differs from the behavior for SYSDATE(), which returns the exact time at which it executes.
Return type: TIMESTAMP
Specification: NOW() -> TIMESTAMP
Example:
> SELECT NOW() as value_1, NOW() as value_2; fetched rows / total rows = 1/1 +---------------------+---------------------+ | value_1 | value_2 | |---------------------+---------------------| | 2022-08-02 15:39:05 | 2022-08-02 15:39:05 | +---------------------+---------------------+
Usage: period_add(P, N) add N months to period P (in the format YYMM or YYYYMM). Returns a value in the format YYYYMM.
Argument type: INTEGER, INTEGER
Return type: INTEGER
Example:
os> SELECT PERIOD_ADD(200801, 2), PERIOD_ADD(200801, -12) fetched rows / total rows = 1/1 +-----------------------+-------------------------+ | PERIOD_ADD(200801, 2) | PERIOD_ADD(200801, -12) | |-----------------------+-------------------------| | 200803 | 200701 | +-----------------------+-------------------------+
Usage: period_diff(P1, P2) returns the number of months between periods P1 and P2 given in the format YYMM or YYYYMM.
Argument type: INTEGER, INTEGER
Return type: INTEGER
Example:
os> SELECT PERIOD_DIFF(200802, 200703), PERIOD_DIFF(200802, 201003) fetched rows / total rows = 1/1 +-----------------------------+-----------------------------+ | PERIOD_DIFF(200802, 200703) | PERIOD_DIFF(200802, 201003) | |-----------------------------+-----------------------------| | 11 | -25 | +-----------------------------+-----------------------------+
Usage: quarter(date) returns the quarter of the year for date, in the range 1 to 4.
Argument type: STRING/DATE/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT QUARTER(DATE('2020-08-26'))
fetched rows / total rows = 1/1
+-----------------------------+
| QUARTER(DATE('2020-08-26')) |
|-----------------------------|
| 3 |
+-----------------------------+
Usage: sec_to_time(number) returns the time in HH:mm:ssss[.nnnnnn] format. Note that the function returns a time between 00:00:00 and 23:59:59. If an input value is too large (greater than 86399), the function will wrap around and begin returning outputs starting from 00:00:00. If an input value is too small (less than 0), the function will wrap around and begin returning outputs counting down from 23:59:59.
Argument type: INTEGER, LONG, DOUBLE, FLOAT
Return type: TIME
Example:
os> SELECT SEC_TO_TIME(3601) fetched rows / total rows = 1/1 +-------------------+ | SEC_TO_TIME(3601) | |-------------------| | 01:00:01 | +-------------------+ os> SELECT sec_to_time(1234.123); fetched rows / total rows = 1/1 +-----------------------+ | sec_to_time(1234.123) | |-----------------------| | 00:20:34.123 | +-----------------------+ os> SELECT sec_to_time(NULL); fetched rows / total rows = 1/1 +-------------------+ | sec_to_time(NULL) | |-------------------| | null | +-------------------+
Usage: second(time) returns the second for time, in the range 0 to 59. The function second_of_minute is provided as an alias
Argument type: STRING/TIME/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT SECOND((TIME '01:02:03'))
fetched rows / total rows = 1/1
+---------------------------+
| SECOND((TIME '01:02:03')) |
|---------------------------|
| 3 |
+---------------------------+
os> SELECT SECOND_OF_MINUTE(time('01:02:03'))
fetched rows / total rows = 1/1
+------------------------------------+
| SECOND_OF_MINUTE(time('01:02:03')) |
|------------------------------------|
| 3 |
+------------------------------------+
Usage: str_to_date(string, string) is used to extract a TIMESTAMP from the first argument string using the formats specified in the second argument string. The input argument must have enough information to be parsed as a DATE, TIMESTAMP, or TIME. Acceptable string format specifiers are the same as those used in the DATE_FORMAT function. It returns NULL when a statement cannot be parsed due to an invalid pair of arguments, and when 0 is provided for any DATE field. Otherwise, it will return a TIMESTAMP with the parsed values (as well as default values for any field that was not parsed).
Argument type: STRING, STRING
Return type: TIMESTAMP
Example:
OS> SELECT str_to_date("01,5,2013", "%d,%m,%Y")
fetched rows / total rows = 1/1
+--------------------------------------+
| str_to_date("01,5,2013", "%d,%m,%Y") |
|--------------------------------------|
| 2013-05-01 00:00:00 |
+--------------------------------------+
Usage: subdate(date, INTERVAL expr unit) / subdate(date, days) subtracts the time interval expr from date; subdate(date, days) subtracts the second argument as integer number of days from date. If first argument is TIME, today's date is used; if first argument is DATE, time at midnight is used.
Argument type: DATE/TIMESTAMP/TIME, INTERVAL/LONG
Return type map:
(DATE/TIMESTAMP/TIME, INTERVAL) -> TIMESTAMP
(DATE, LONG) -> DATE
(TIMESTAMP/TIME, LONG) -> TIMESTAMP
Synonyms: DATE_SUB when invoked with the INTERVAL form of the second argument.
Antonyms: ADDDATE
Example:
os> SELECT SUBDATE(DATE('2008-01-02'), INTERVAL 31 DAY) AS `'2008-01-02' - 31d`, SUBDATE(DATE('2020-08-26'), 1) AS `'2020-08-26' - 1`, SUBDATE(TIMESTAMP('2020-08-26 01:01:01'), 1) AS `ts '2020-08-26 01:01:01' - 1`
fetched rows / total rows = 1/1
+---------------------+------------------+------------------------------+
| '2008-01-02' - 31d | '2020-08-26' - 1 | ts '2020-08-26 01:01:01' - 1 |
|---------------------+------------------+------------------------------|
| 2007-12-02 00:00:00 | 2020-08-25 | 2020-08-25 01:01:01 |
+---------------------+------------------+------------------------------+
Usage: subtime(expr1, expr2) subtracts expr2 from expr1 and returns the result. If argument is TIME, today's date is used; if argument is DATE, time at midnight is used.
Argument type: DATE/TIMESTAMP/TIME, DATE/TIMESTAMP/TIME
Return type map:
(DATE/TIMESTAMP, DATE/TIMESTAMP/TIME) -> TIMESTAMP
(TIME, DATE/TIMESTAMP/TIME) -> TIME
Antonyms: ADDTIME
Example:
os> SELECT SUBTIME(DATE('2008-12-12'), DATE('2008-11-15')) AS `'2008-12-12' - 0`
fetched rows / total rows = 1/1
+---------------------+
| '2008-12-12' - 0 |
|---------------------|
| 2008-12-12 00:00:00 |
+---------------------+
os> SELECT SUBTIME(TIME('23:59:59'), DATE('2004-01-01')) AS `'23:59:59' - 0`
fetched rows / total rows = 1/1
+----------------+
| '23:59:59' - 0 |
|----------------|
| 23:59:59 |
+----------------+
os> SELECT SUBTIME(DATE('2004-01-01'), TIME('23:59:59')) AS `'2004-01-01' - '23:59:59'`
fetched rows / total rows = 1/1
+---------------------------+
| '2004-01-01' - '23:59:59' |
|---------------------------|
| 2003-12-31 00:00:01 |
+---------------------------+
os> SELECT SUBTIME(TIME('10:20:30'), TIME('00:05:42')) AS `'10:20:30' - '00:05:42'`
fetched rows / total rows = 1/1
+-------------------------+
| '10:20:30' - '00:05:42' |
|-------------------------|
| 10:14:48 |
+-------------------------+
os> SELECT SUBTIME(TIMESTAMP('2007-03-01 10:20:30'), TIMESTAMP('2002-03-04 20:40:50')) AS `'2007-03-01 10:20:30' - '20:40:50'`
fetched rows / total rows = 1/1
+------------------------------------+
| '2007-03-01 10:20:30' - '20:40:50' |
|------------------------------------|
| 2007-02-28 13:39:40 |
+------------------------------------+
Returns the current date and time as a value in 'YYYY-MM-DD hh:mm:ss[.nnnnnn]'. SYSDATE() returns the time at which it executes. This differs from the behavior for NOW(), which returns a constant time that indicates the time at which the statement began to execute. If the argument is given, it specifies a fractional seconds precision from 0 to 6, the return value includes a fractional seconds part of that many digits.
Optional argument type: INTEGER
Return type: TIMESTAMP
Specification: SYSDATE([INTEGER]) -> TIMESTAMP
Example:
> SELECT SYSDATE() as value_1, SYSDATE(6) as value_2; fetched rows / total rows = 1/1 +---------------------+----------------------------+ | value_1 | value_2 | |---------------------+----------------------------| | 2022-08-02 15:39:05 | 2022-08-02 15:39:05.123456 | +---------------------+----------------------------+
Usage: time(expr) constructs a time type with the input string expr as a time. If the argument is of date/time/timestamp, it extracts the time value part from the expression.
Argument type: STRING/DATE/TIME/TIMESTAMP
Return type: TIME
Example:
os> SELECT TIME('13:49:00'), TIME('13:49'), TIME(TIMESTAMP('2020-08-26 13:49:00')), TIME('2020-08-26 13:49:00')
fetched rows / total rows = 1/1
+------------------+---------------+----------------------------------------+-----------------------------+
| TIME('13:49:00') | TIME('13:49') | TIME(TIMESTAMP('2020-08-26 13:49:00')) | TIME('2020-08-26 13:49:00') |
|------------------+---------------+----------------------------------------+-----------------------------|
| 13:49:00 | 13:49:00 | 13:49:00 | 13:49:00 |
+------------------+---------------+----------------------------------------+-----------------------------+
Usage: time_format(time, format) formats the time argument using the specifiers in the format argument. This supports a subset of the time format specifiers available for the date_format function. Using date format specifiers supported by date_format will return 0 or null. Acceptable format specifiers are listed in the table below. If an argument of type DATE is passed in, it is treated as a TIMESTAMP at midnight (i.e., 00:00:00).
| Specifier | Description |
|---|---|
| %f | Microseconds (000000..999999) |
| %H | Hour (00..23) |
| %h | Hour (01..12) |
| %I | Hour (01..12) |
| %i | Minutes, numeric (00..59) |
| %p | AM or PM |
| %r | Time, 12-hour (hh:mm:ss followed by AM or PM) |
| %S | Seconds (00..59) |
| %s | Seconds (00..59) |
| %T | Time, 24-hour (hh:mm:ss) |
Argument type: STRING/DATE/TIME/TIMESTAMP, STRING
Return type: STRING
Example:
os> SELECT TIME_FORMAT('1998-01-31 13:14:15.012345', '%f %H %h %I %i %p %r %S %s %T')
fetched rows / total rows = 1/1
+----------------------------------------------------------------------------+
| TIME_FORMAT('1998-01-31 13:14:15.012345', '%f %H %h %I %i %p %r %S %s %T') |
|----------------------------------------------------------------------------|
| 012345 13 01 01 14 PM 01:14:15 PM 15 15 13:14:15 |
+----------------------------------------------------------------------------+
Usage: time_to_sec(time) returns the time argument, converted to seconds.
Argument type: STRING/TIME/TIMESTAMP
Return type: LONG
Example:
os> SELECT TIME_TO_SEC(TIME '22:23:00') fetched rows / total rows = 1/1 +------------------------------+ | TIME_TO_SEC(TIME '22:23:00') | |------------------------------| | 80580 | +------------------------------+
Usage: returns the difference between two time expressions as a time.
Argument type: TIME, TIME
Return type: TIME
Example:
os> SELECT TIMEDIFF('23:59:59', '13:00:00')
fetched rows / total rows = 1/1
+----------------------------------+
| TIMEDIFF('23:59:59', '13:00:00') |
|----------------------------------|
| 10:59:59 |
+----------------------------------+
Usage: timestamp(expr) constructs a timestamp type with the input string expr as an timestamp. If the argument is not a string, it casts expr to timestamp type with default timezone UTC. If argument is a time, it applies today's date before cast. With two arguments timestamp(expr1, expr2) adds the time expression expr2 to the date or timestamp expression expr1 and returns the result as a timestamp value.
Argument type: STRING/DATE/TIME/TIMESTAMP
Return type map:
(STRING/DATE/TIME/TIMESTAMP) -> TIMESTAMP
(STRING/DATE/TIME/TIMESTAMP, STRING/DATE/TIME/TIMESTAMP) -> TIMESTAMP
Example:
os> SELECT TIMESTAMP('2020-08-26 13:49:00'), TIMESTAMP('2020-08-26 13:49:00', TIME('12:15:42'))
fetched rows / total rows = 1/1
+----------------------------------+----------------------------------------------------+
| TIMESTAMP('2020-08-26 13:49:00') | TIMESTAMP('2020-08-26 13:49:00', TIME('12:15:42')) |
|----------------------------------+----------------------------------------------------|
| 2020-08-26 13:49:00 | 2020-08-27 02:04:42 |
+----------------------------------+----------------------------------------------------+
Usage: Returns a TIMESTAMP value based on a passed in DATE/TIME/TIMESTAMP/STRING argument and an INTERVAL and INTEGER argument which determine the amount of time to be added. If the third argument is a STRING, it must be formatted as a valid TIMESTAMP. If only a TIME is provided, a TIMESTAMP is still returned with the DATE portion filled in using the current date. If the third argument is a DATE, it will be automatically converted to a TIMESTAMP.
Argument type: INTERVAL, INTEGER, DATE/TIME/TIMESTAMP/STRING INTERVAL must be one of the following tokens: [MICROSECOND, SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, YEAR]
Examples:
os> SELECT TIMESTAMPADD(DAY, 17, '2000-01-01 00:00:00'), TIMESTAMPADD(QUARTER, -1, '2000-01-01 00:00:00') fetched rows / total rows = 1/1 +----------------------------------------------+--------------------------------------------------+ | TIMESTAMPADD(DAY, 17, '2000-01-01 00:00:00') | TIMESTAMPADD(QUARTER, -1, '2000-01-01 00:00:00') | |----------------------------------------------+--------------------------------------------------| | 2000-01-18 00:00:00 | 1999-10-01 00:00:00 | +----------------------------------------------+--------------------------------------------------+
Usage: TIMESTAMPDIFF(interval, start, end) returns the difference between the start and end date/times in interval units. If a TIME is provided as an argument, it will be converted to a TIMESTAMP with the DATE portion filled in using the current date. Arguments will be automatically converted to a TIME/TIMESTAMP when appropriate. Any argument that is a STRING must be formatted as a valid TIMESTAMP.
Argument type: INTERVAL, DATE/TIME/TIMESTAMP/STRING, DATE/TIME/TIMESTAMP/STRING INTERVAL must be one of the following tokens: [MICROSECOND, SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, YEAR]
Examples:
os> SELECT TIMESTAMPDIFF(YEAR, '1997-01-01 00:00:00', '2001-03-06 00:00:00'), TIMESTAMPDIFF(SECOND, time('00:00:23'), time('00:00:00'))
fetched rows / total rows = 1/1
+-------------------------------------------------------------------+-----------------------------------------------------------+
| TIMESTAMPDIFF(YEAR, '1997-01-01 00:00:00', '2001-03-06 00:00:00') | TIMESTAMPDIFF(SECOND, time('00:00:23'), time('00:00:00')) |
|-------------------------------------------------------------------+-----------------------------------------------------------|
| 4 | -23 |
+-------------------------------------------------------------------+-----------------------------------------------------------+
Usage: to_days(date) returns the day number (the number of days since year 0) of the given date. Returns NULL if date is invalid.
Argument type: STRING/DATE/TIMESTAMP
Return type: LONG
Example:
os> SELECT TO_DAYS(DATE '2008-10-07') fetched rows / total rows = 1/1 +----------------------------+ | TO_DAYS(DATE '2008-10-07') | |----------------------------| | 733687 | +----------------------------+
Usage: to_seconds(date) returns the number of seconds since the year 0 of the given value. Returns NULL if value is invalid. An argument of a LONG type can be used. It must be formatted as YMMDD, YYMMDD, YYYMMDD or YYYYMMDD. Note that a LONG type argument cannot have leading 0s as it will be parsed using an octal numbering system.
Argument type: STRING/LONG/DATE/TIME/TIMESTAMP
Return type: LONG
Example:
os> SELECT TO_SECONDS(DATE '2008-10-07'), TO_SECONDS(950228) fetched rows / total rows = 1/1 +-------------------------------+--------------------+ | TO_SECONDS(DATE '2008-10-07') | TO_SECONDS(950228) | |-------------------------------+--------------------| | 63390556800 | 62961148800 | +-------------------------------+--------------------+
Usage: Converts given argument to Unix time (seconds since January 1st, 1970 at 00:00:00 UTC). If no argument given, it returns current Unix time. The date argument may be a DATE, TIMESTAMP, or TIMESTAMP string, or a number in YYMMDD, YYMMDDhhmmss, YYYYMMDD, or YYYYMMDDhhmmss format. If the argument includes a time part, it may optionally include a fractional seconds part. If argument is in invalid format or outside of range 1970-01-01 00:00:00 - 3001-01-18 23:59:59.999999 (0 to 32536771199.999999 epoch time), function returns NULL. You can use FROM_UNIXTIME to do reverse conversion.
Argument type: <NONE>/DOUBLE/DATE/TIMESTAMP
Return type: DOUBLE
Examples:
os> select UNIX_TIMESTAMP(20771122143845)
fetched rows / total rows = 1/1
+--------------------------------+
| UNIX_TIMESTAMP(20771122143845) |
|--------------------------------|
| 3404817525.0 |
+--------------------------------+
os> select UNIX_TIMESTAMP(TIMESTAMP('1996-11-15 17:05:42'))
fetched rows / total rows = 1/1
+--------------------------------------------------+
| UNIX_TIMESTAMP(TIMESTAMP('1996-11-15 17:05:42')) |
|--------------------------------------------------|
| 848077542.0 |
+--------------------------------------------------+
Returns the current UTC date as a value in 'YYYY-MM-DD'.
Return type: DATE
Specification: UTC_DATE() -> DATE
Example:
> SELECT UTC_DATE(); fetched rows / total rows = 1/1 +------------+ | utc_date() | |------------| | 2022-10-03 | +------------+
Returns the current UTC time as a value in 'hh:mm:ss'.
Return type: TIME
Specification: UTC_TIME() -> TIME
Example:
> SELECT UTC_TIME(); fetched rows / total rows = 1/1 +------------+ | utc_time() | |------------| | 17:54:27 | +------------+
Returns the current UTC timestamp as a value in 'YYYY-MM-DD hh:mm:ss'.
Return type: TIMESTAMP
Specification: UTC_TIMESTAMP() -> TIMESTAMP
Example:
> SELECT UTC_TIMESTAMP(); fetched rows / total rows = 1/1 +---------------------+ | utc_timestamp() | |---------------------| | 2022-10-03 17:54:28 | +---------------------+
Usage: week(date[, mode]) returns the week number for date. If the mode argument is omitted, the default mode 0 is used. If an argument of type TIME is given, the function will use the current date. The functions weekofyear and week_of_year is also provided as an alias.
| Mode | First day of week | Range | Week 1 is the first week ... |
|---|---|---|---|
| 0 | Sunday | 0-53 | with a Sunday in this year |
| 1 | Monday | 0-53 | with 4 or more days this year |
| 2 | Sunday | 1-53 | with a Sunday in this year |
| 3 | Monday | 1-53 | with 4 or more days this year |
| 4 | Sunday | 0-53 | with 4 or more days this year |
| 5 | Monday | 0-53 | with a Monday in this year |
| 6 | Sunday | 1-53 | with 4 or more days this year |
| 7 | Monday | 1-53 | with a Monday in this year |
Argument type: DATE/TIME/TIMESTAMP/STRING
Return type: INTEGER
Example:
os> SELECT WEEK(DATE('2008-02-20')), WEEK(DATE('2008-02-20'), 1)
fetched rows / total rows = 1/1
+--------------------------+-----------------------------+
| WEEK(DATE('2008-02-20')) | WEEK(DATE('2008-02-20'), 1) |
|--------------------------+-----------------------------|
| 7 | 8 |
+--------------------------+-----------------------------+
Usage: weekday(date) returns the weekday index for date (0 = Monday, 1 = Tuesday, ..., 6 = Sunday).
It is similar to the dayofweek function, but returns different indexes for each day.
Argument type: STRING/DATE/TIME/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT weekday('2020-08-26'), weekday('2020-08-27')
fetched rows / total rows = 1/1
+-----------------------+-----------------------+
| weekday('2020-08-26') | weekday('2020-08-27') |
|-----------------------+-----------------------|
| 2 | 3 |
+-----------------------+-----------------------+
The week_of_year function is a synonym for the week function. If an argument of type TIME is given, the function will use the current date.
Argument type: DATE/TIME/TIMESTAMP/STRING
Return type: INTEGER
Example:
os> SELECT WEEK_OF_YEAR(DATE('2008-02-20')), WEEK_OF_YEAR(DATE('2008-02-20'), 1)
fetched rows / total rows = 1/1
+----------------------------------+-------------------------------------+
| WEEK_OF_YEAR(DATE('2008-02-20')) | WEEK_OF_YEAR(DATE('2008-02-20'), 1) |
|----------------------------------+-------------------------------------|
| 7 | 8 |
+----------------------------------+-------------------------------------+
The weekofyear function is a synonym for the week function. If an argument of type TIME is given, the function will use the current date.
Argument type: DATE/TIME/TIMESTAMP/STRING
Return type: INTEGER
Example:
os> SELECT WEEKOFYEAR(DATE('2008-02-20')), WEEKOFYEAR(DATE('2008-02-20'), 1)
fetched rows / total rows = 1/1
+--------------------------------+-----------------------------------+
| WEEKOFYEAR(DATE('2008-02-20')) | WEEKOFYEAR(DATE('2008-02-20'), 1) |
|--------------------------------+-----------------------------------|
| 7 | 8 |
+--------------------------------+-----------------------------------+
Usage: year(date) returns the year for date, in the range 1000 to 9999, or 0 for the “zero” date.
Argument type: STRING/DATE/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT YEAR(DATE('2020-08-26'))
fetched rows / total rows = 1/1
+--------------------------+
| YEAR(DATE('2020-08-26')) |
|--------------------------|
| 2020 |
+--------------------------+
Usage: yearweek(date) returns the year and week for date as an integer. It accepts and optional mode arguments aligned with those available for the WEEK function.
Argument type: STRING/DATE/TIME/TIMESTAMP
Return type: INTEGER
Example:
os> SELECT YEARWEEK('2020-08-26'), YEARWEEK('2019-01-05', 0)
fetched rows / total rows = 1/1
+------------------------+---------------------------+
| YEARWEEK('2020-08-26') | YEARWEEK('2019-01-05', 0) |
|------------------------+---------------------------|
| 202034 | 201852 |
+------------------------+---------------------------+
Usage: ASCII(expr) returns the numeric value of the leftmost character of the string str. Returns 0 if str is the empty string. Returns NULL if str is NULL. ASCII() works for 8-bit characters.
Argument type: STRING
Return type: INTEGER
Example:
os> SELECT ASCII('hello')
fetched rows / total rows = 1/1
+----------------+
| ASCII('hello') |
|----------------|
| 104 |
+----------------+
Usage: CONCAT(str1, str2, ...., str_9) adds up to 9 strings together. If any of the expressions is a NULL value, it returns NULL.
Argument type: STRING, STRING, ...., STRING
Return type: STRING
Example:
os> SELECT CONCAT('hello ', 'whole ', 'world', '!'), CONCAT('hello', 'world'), CONCAT('hello', null)
fetched rows / total rows = 1/1
+------------------------------------------+--------------------------+-----------------------+
| CONCAT('hello ', 'whole ', 'world', '!') | CONCAT('hello', 'world') | CONCAT('hello', null) |
|------------------------------------------+--------------------------+-----------------------|
| hello whole world! | helloworld | null |
+------------------------------------------+--------------------------+-----------------------+
Usage: CONCAT_WS(sep, str1, str2) returns str1 concatenated with str2 using sep as a separator between them.
Argument type: STRING, STRING, STRING
Return type: STRING
Example:
os> SELECT CONCAT_WS(',', 'hello', 'world')
fetched rows / total rows = 1/1
+----------------------------------+
| CONCAT_WS(',', 'hello', 'world') |
|----------------------------------|
| hello,world |
+----------------------------------+
Usage: left(str, len) returns the leftmost len characters from the string str, or NULL if any argument is NULL.
Argument type: STRING, INTEGER
Return type: STRING
Example:
os> SELECT LEFT('helloworld', 5), LEFT('HELLOWORLD', 0)
fetched rows / total rows = 1/1
+-----------------------+-----------------------+
| LEFT('helloworld', 5) | LEFT('HELLOWORLD', 0) |
|-----------------------+-----------------------|
| hello | |
+-----------------------+-----------------------+
Usage: length(str) returns length of string measured in bytes.
Argument type: STRING
Return type: INTEGER
Example:
os> SELECT LENGTH('helloworld')
fetched rows / total rows = 1/1
+----------------------+
| LENGTH('helloworld') |
|----------------------|
| 10 |
+----------------------+
Usage: The first syntax LOCATE(substr, str) returns the position of the first occurrence of substring substr in string str. The second syntax LOCATE(substr, str, pos) returns the position of the first occurrence of substring substr in string str, starting at position pos. Returns 0 if substr is not in str. Returns NULL if any argument is NULL.
Argument type: STRING, STRING, INTEGER
Return type map:
(STRING, STRING) -> INTEGER (STRING, STRING, INTEGER) -> INTEGER
Example:
os> SELECT LOCATE('world', 'helloworld'), LOCATE('world', 'helloworldworld', 7)
fetched rows / total rows = 1/1
+-------------------------------+---------------------------------------+
| LOCATE('world', 'helloworld') | LOCATE('world', 'helloworldworld', 7) |
|-------------------------------+---------------------------------------|
| 6 | 11 |
+-------------------------------+---------------------------------------+
Usage: lower(string) converts the string to lowercase.
Argument type: STRING
Return type: STRING
Example:
os> SELECT LOWER('helloworld'), LOWER('HELLOWORLD')
fetched rows / total rows = 1/1
+---------------------+---------------------+
| LOWER('helloworld') | LOWER('HELLOWORLD') |
|---------------------+---------------------|
| helloworld | helloworld |
+---------------------+---------------------+
Usage: ltrim(str) trims leading space characters from the string.
Argument type: STRING
Return type: STRING
Example:
os> SELECT LTRIM(' hello'), LTRIM('hello ')
fetched rows / total rows = 1/1
+-------------------+-------------------+
| LTRIM(' hello') | LTRIM('hello ') |
|-------------------+-------------------|
| hello | hello |
+-------------------+-------------------+
Usage: The syntax POSITION(substr IN str) returns the position of the first occurrence of substring substr in string str. Returns 0 if substr is not in str. Returns NULL if any argument is NULL.
Argument type: STRING, STRING
Return type integer:
(STRING IN STRING) -> INTEGER
Example:
os> SELECT POSITION('world' IN 'helloworld'), POSITION('invalid' IN 'helloworld');
fetched rows / total rows = 1/1
+-----------------------------------+-------------------------------------+
| POSITION('world' IN 'helloworld') | POSITION('invalid' IN 'helloworld') |
|-----------------------------------+-------------------------------------|
| 6 | 0 |
+-----------------------------------+-------------------------------------+
Usage: REPLACE(str, from_str, to_str) returns the string str with all occurrences of the string from_str replaced by the string to_str. REPLACE() performs a case-sensitive match when searching for from_str.
Argument type: STRING, STRING, STRING
Return type: STRING
Example:
os> SELECT REPLACE('Hello World!', 'World', 'OpenSearch')
fetched rows / total rows = 1/1
+------------------------------------------------+
| REPLACE('Hello World!', 'World', 'OpenSearch') |
|------------------------------------------------|
| Hello OpenSearch! |
+------------------------------------------------+
Usage: REVERSE(str) returns reversed string of the string supplied as an argument. Returns NULL if the argument is NULL.
Argument type: STRING
Return type: STRING
Example:
os> SELECT REVERSE('abcde'), REVERSE(null)
fetched rows / total rows = 1/1
+------------------+---------------+
| REVERSE('abcde') | REVERSE(null) |
|------------------+---------------|
| edcba | null |
+------------------+---------------+
Usage: right(str, len) returns the rightmost len characters from the string str, or NULL if any argument is NULL.
Argument type: STRING, INTEGER
Return type: STRING
Example:
os> SELECT RIGHT('helloworld', 5), RIGHT('HELLOWORLD', 0)
fetched rows / total rows = 1/1
+------------------------+------------------------+
| RIGHT('helloworld', 5) | RIGHT('HELLOWORLD', 0) |
|------------------------+------------------------|
| world | |
+------------------------+------------------------+
Usage: rtrim(str) trims trailing space characters from the string.
Argument type: STRING
Return type: STRING
Example:
os> SELECT RTRIM(' hello'), RTRIM('hello ')
fetched rows / total rows = 1/1
+-------------------+-------------------+
| RTRIM(' hello') | RTRIM('hello ') |
|-------------------+-------------------|
| hello | hello |
+-------------------+-------------------+
Usage: substring(str, start) or substring(str, start, length) returns substring using start and length. With no length, entire string from start is returned.
Argument type: STRING, INTEGER, INTEGER
Return type: STRING
Synonyms: SUBSTR
Example:
os> SELECT SUBSTRING('helloworld', 5), SUBSTRING('helloworld', 5, 3)
fetched rows / total rows = 1/1
+----------------------------+-------------------------------+
| SUBSTRING('helloworld', 5) | SUBSTRING('helloworld', 5, 3) |
|----------------------------+-------------------------------|
| oworld | owo |
+----------------------------+-------------------------------+
Argument Type: STRING
Return type: STRING
Example:
os> SELECT TRIM(' hello'), TRIM('hello ')
fetched rows / total rows = 1/1
+------------------+------------------+
| TRIM(' hello') | TRIM('hello ') |
|------------------+------------------|
| hello | hello |
+------------------+------------------+
Usage: upper(string) converts the string to uppercase.
Argument type: STRING
Return type: STRING
Example:
os> SELECT UPPER('helloworld'), UPPER('HELLOWORLD')
fetched rows / total rows = 1/1
+---------------------+---------------------+
| UPPER('helloworld') | UPPER('HELLOWORLD') |
|---------------------+---------------------|
| HELLOWORLD | HELLOWORLD |
+---------------------+---------------------+
Usage: return parameter2 if parameter1 is null, otherwise return parameter1
Argument type: Any
Return type: Any (NOTE : if two parameters has different type, you will fail semantic check"
Example One:
os> SELECT IFNULL(123, 321), IFNULL(321, 123) fetched rows / total rows = 1/1 +------------------+------------------+ | IFNULL(123, 321) | IFNULL(321, 123) | |------------------+------------------| | 123 | 321 | +------------------+------------------+
Example Two:
os> SELECT IFNULL(321, 1/0), IFNULL(1/0, 123) fetched rows / total rows = 1/1 +------------------+------------------+ | IFNULL(321, 1/0) | IFNULL(1/0, 123) | |------------------+------------------| | 321 | 123 | +------------------+------------------+
Example Three:
os> SELECT IFNULL(1/0, 1/0) fetched rows / total rows = 1/1 +------------------+ | IFNULL(1/0, 1/0) | |------------------| | null | +------------------+
Usage: return null if two parameters are same, otherwise return parameer1
Argument type: Any
Return type: Any (NOTE : if two parametershas different type, you will fail semantic check")
Example:
os> SELECT NULLIF(123, 123), NULLIF(321, 123), NULLIF(1/0, 321), NULLIF(321, 1/0), NULLIF(1/0, 1/0) fetched rows / total rows = 1/1 +------------------+------------------+------------------+------------------+------------------+ | NULLIF(123, 123) | NULLIF(321, 123) | NULLIF(1/0, 321) | NULLIF(321, 1/0) | NULLIF(1/0, 1/0) | |------------------+------------------+------------------+------------------+------------------| | null | 321 | null | 321 | null | +------------------+------------------+------------------+------------------+------------------+
Usage: return true if parameter is null, otherwise return false
Argument type: Any
Return type: boolean
Example:
os> SELECT ISNULL(1/0), ISNULL(123) fetched rows / total rows = 1/1 +-------------+-------------+ | ISNULL(1/0) | ISNULL(123) | |-------------+-------------| | True | False | +-------------+-------------+
Usage: if first parameter is true, return second parameter, otherwise return third one.
Argument type: condition as BOOLEAN, second and third can by any type
Return type: Any
NOTE : if parameters #2 and #3 has different type, you will fail semantic check
Example:
os> SELECT IF(100 > 200, '100', '200') fetched rows / total rows = 1/1 +-----------------------------+ | IF(100 > 200, '100', '200') | |-----------------------------| | 200 | +-----------------------------+ os> SELECT IF(200 > 100, '100', '200') fetched rows / total rows = 1/1 +-----------------------------+ | IF(200 > 100, '100', '200') | |-----------------------------| | 100 | +-----------------------------+
CASE statement has two forms with slightly different syntax: Simple Case and Searched Case.
Simple case syntax compares a case value expression with each compare expression in WHEN clause and return its result if matched. Otherwise, result expression's value in ELSE clause is returned (or NULL if absent):
CASE case_value_expression WHEN compare_expression THEN result_expression [WHEN compare_expression THEN result_expression] ... [ELSE result_expression] END
Similarly, searched case syntax evaluates each search condition and return result if true. A search condition must be a predicate that returns a bool when evaluated:
CASE WHEN search_condition THEN result_expression [WHEN search_condition THEN result_expression] ... [ELSE result_expression] END
All result types in WHEN and ELSE clause are required to be exactly the same. Otherwise, take the following query for example, you'll see an semantic analysis exception thrown:
CASE age WHEN 30 THEN 'Thirty' WHEN 50 THEN true END
Here are examples for simple case syntax:
os> SELECT
... CASE 1
... WHEN 1 THEN 'One'
... END AS simple_case,
... CASE ABS(-2)
... WHEN 1 THEN 'One'
... WHEN 2 THEN 'Absolute two'
... END AS func_case_value,
... CASE ABS(-3)
... WHEN 1 THEN 'One'
... ELSE TRIM(' Absolute three ')
... END AS func_result;
fetched rows / total rows = 1/1
+-------------+-----------------+----------------+
| simple_case | func_case_value | func_result |
|-------------+-----------------+----------------|
| One | Absolute two | Absolute three |
+-------------+-----------------+----------------+
Here are examples for searched case syntax:
os> SELECT ... CASE ... WHEN 1 = 1 THEN 'One' ... END AS single_search, ... CASE ... WHEN 2 = 1 THEN 'One' ... WHEN 'hello' = 'hello' THEN 'Hello' END AS multi_searches, ... CASE ... WHEN 2 = 1 THEN 'One' ... WHEN 'hello' = 'world' THEN 'Hello' ... END AS no_else; fetched rows / total rows = 1/1 +---------------+----------------+---------+ | single_search | multi_searches | no_else | |---------------+----------------+---------| | One | Hello | null | +---------------+----------------+---------+
The relevance based functions enable users to search the index for documents by the relevance of the input query. The functions are built on the top of the search queries of the OpenSearch engine, but in memory execution within the plugin is not supported. These functions are able to perform the global filter of a query, for example the condition expression in a WHERE clause or in a HAVING clause. For more details of the relevance based search, check out the design here: Relevance Based Search With SQL/PPL Query Engine
match(field_expression, query_expression[, option=<option_value>]*)
The match function maps to the match query used in search engine, to return the documents that match a provided text, number, date or boolean value with a given field. Available parameters include:
- analyzer
- auto_generate_synonyms_phrase
- fuzziness
- max_expansions
- prefix_length
- fuzzy_transpositions
- fuzzy_rewrite
- lenient
- operator
- minimum_should_match
- zero_terms_query
- boost
Example with only field and query expressions, and all other parameters are set default values:
os> SELECT lastname, address FROM accounts WHERE match(address, 'Street'); fetched rows / total rows = 2/2 +----------+--------------------+ | lastname | address | |----------+--------------------| | Bond | 671 Bristol Street | | Bates | 789 Madison Street | +----------+--------------------+
Another example to show how to set custom values for the optional parameters:
os> SELECT lastname FROM accounts WHERE match(firstname, 'Hattie', operator='AND', boost=2.0); fetched rows / total rows = 1/1 +----------+ | lastname | |----------| | Bond | +----------+
The matchquery function is a synonym for the match function.
Example with only field and query expressions, and all other parameters are set default values:
os> SELECT lastname, address FROM accounts WHERE matchquery(address, 'Street'); fetched rows / total rows = 2/2 +----------+--------------------+ | lastname | address | |----------+--------------------| | Bond | 671 Bristol Street | | Bates | 789 Madison Street | +----------+--------------------+
Another example to show how to set custom values for the optional parameters:
os> SELECT lastname FROM accounts WHERE matchquery(firstname, 'Hattie', operator='AND', boost=2.0);
fetched rows / total rows = 1/1
+----------+
| lastname |
|----------|
| Bond |
+----------+
The matchquery function also supports an alternative syntax::
os> SELECT firstname FROM accounts WHERE firstname = matchquery('Hattie');
fetched rows / total rows = 1/1
+-----------+
| firstname |
|-----------|
| Hattie |
+-----------+
The match_query function is a synonym for the match function.
Example with only field and query expressions, and all other parameters are set default values:
os> SELECT lastname, address FROM accounts WHERE match_query(address, 'Street'); fetched rows / total rows = 2/2 +----------+--------------------+ | lastname | address | |----------+--------------------| | Bond | 671 Bristol Street | | Bates | 789 Madison Street | +----------+--------------------+
Another example to show how to set custom values for the optional parameters:
os> SELECT lastname FROM accounts WHERE match_query(firstname, 'Hattie', operator='AND', boost=2.0); fetched rows / total rows = 1/1 +----------+ | lastname | |----------| | Bond | +----------+
The match_query function also supports an alternative syntax:
os> SELECT firstname FROM accounts WHERE firstname = match_query('Hattie');
fetched rows / total rows = 1/1
+-----------+
| firstname |
|-----------|
| Hattie |
+-----------+
match_phrase(field_expression, query_expression[, option=<option_value>]*)
The match_phrase function maps to the match_phrase query used in search engine, to return the documents that match a provided text with a given field. Available parameters include:
- analyzer
- slop
- zero_terms_query
matchphrase and matchphrasequery are synonyms for match_phrase
Example with only field and query expressions, and all other parameters are set default values:
os> SELECT author, title FROM books WHERE match_phrase(author, 'Alexander Milne'); fetched rows / total rows = 2/2 +----------------------+--------------------------+ | author | title | |----------------------+--------------------------| | Alan Alexander Milne | The House at Pooh Corner | | Alan Alexander Milne | Winnie-the-Pooh | +----------------------+--------------------------+
Another example to show how to set custom values for the optional parameters:
os> SELECT author, title FROM books WHERE match_phrase(author, 'Alan Milne', slop = 2); fetched rows / total rows = 2/2 +----------------------+--------------------------+ | author | title | |----------------------+--------------------------| | Alan Alexander Milne | The House at Pooh Corner | | Alan Alexander Milne | Winnie-the-Pooh | +----------------------+--------------------------+
The match_phrase function also supports an alternative syntax:
os> SELECT firstname FROM accounts WHERE firstname = match_phrase('Hattie');
fetched rows / total rows = 1/1
+-----------+
| firstname |
|-----------|
| Hattie |
+-----------+
os> SELECT firstname FROM accounts WHERE firstname = matchphrase('Hattie');
fetched rows / total rows = 1/1
+-----------+
| firstname |
|-----------|
| Hattie |
+-----------+
match_bool_prefix(field_expression, query_expression)
The match_bool_prefix function maps to the match_bool_prefix query in the search engine. match_bool_prefix creates a match query from all but the last term in the query string. The last term is used to create a prefix query.
- fuzziness
- max_expansions
- prefix_length
- fuzzy_transpositions
- fuzzy_rewrite
- minimum_should_match
- boost
- operator
- analyzer
Example with only field and query expressions, and all other parameters are set default values:
os> SELECT firstname, address FROM accounts WHERE match_bool_prefix(address, 'Bristol Stre'); fetched rows / total rows = 2/2 +-----------+--------------------+ | firstname | address | |-----------+--------------------| | Hattie | 671 Bristol Street | | Nanette | 789 Madison Street | +-----------+--------------------+
Another example to show how to set custom values for the optional parameters:
os> SELECT firstname, address FROM accounts WHERE match_bool_prefix(address, 'Bristol Street', minimum_should_match=2); fetched rows / total rows = 1/1 +-----------+--------------------+ | firstname | address | |-----------+--------------------| | Hattie | 671 Bristol Street | +-----------+--------------------+
match_phrase_prefix(field_expression, query_expression[, option=<option_value>]*)
The match_phrase_prefix function maps to the match_phrase_prefix query used in search engine, to return the documents that match a provided text with a given field. Available parameters include:
- analyzer
- slop
- zero_terms_query
- max_expansions
- boost
Example with only field and query expressions, and all other parameters are set default values:
os> SELECT author, title FROM books WHERE match_phrase_prefix(author, 'Alexander Mil'); fetched rows / total rows = 2/2 +----------------------+--------------------------+ | author | title | |----------------------+--------------------------| | Alan Alexander Milne | The House at Pooh Corner | | Alan Alexander Milne | Winnie-the-Pooh | +----------------------+--------------------------+
Another example to show how to set custom values for the optional parameters:
os> SELECT author, title FROM books WHERE match_phrase_prefix(author, 'Alan Mil', slop = 2); fetched rows / total rows = 2/2 +----------------------+--------------------------+ | author | title | |----------------------+--------------------------| | Alan Alexander Milne | The House at Pooh Corner | | Alan Alexander Milne | Winnie-the-Pooh | +----------------------+--------------------------+
multi_match([field_expression+], query_expression[, option=<option_value>]*)
multi_match(query=query_expression+, fields=[field_expression+][, option=<option_value>]*)
The multi_match function maps to the multi_match query used in search engine, to return the documents that match a provided text, number, date or boolean value with a given field or fields.
The ^ lets you boost certain fields. Boosts are multipliers that weigh matches in one field more heavily than matches in other fields. The syntax allows to specify the fields in double quotes, single quotes, in backtick or even without any wrap. All fields search using star "*" is also available (star symbol should be wrapped). The weight is optional and should be specified using after the field name, it could be delimeted by the caret character or by whitespace. Please, refer to examples below:
MULTI_MATCH(...)MULTIMATCH(...)MULTIMATCHQUERY(...)
multi_match(["Tags" ^ 2, 'Title' 3.4, `Body`, Comments ^ 0.3], ...)multi_match(["*"], ...)multimatch(query='query value', fields=["Tags^2,Title^3.4,Body"], ...)multimatchquery('query'='query value', 'fields'='Title', ...)Available parameters include:
- analyzer
- auto_generate_synonyms_phrase
- cutoff_frequency
- fuzziness
- fuzzy_transpositions
- lenient
- max_expansions
- minimum_should_match
- operator
- prefix_length
- tie_breaker
- type
- slop
- boost
Example with only fields and query expressions, and all other parameters are set default values:
os> select id, title, author from books where multi_match(['title'], 'Pooh House'); fetched rows / total rows = 2/2 +----+--------------------------+----------------------+ | id | title | author | |----+--------------------------+----------------------| | 1 | The House at Pooh Corner | Alan Alexander Milne | | 2 | Winnie-the-Pooh | Alan Alexander Milne | +----+--------------------------+----------------------+
Another example to show how to set custom values for the optional parameters:
os> select id, title, author from books where multi_match(['title'], 'Pooh House', operator='AND', analyzer=default); fetched rows / total rows = 1/1 +----+--------------------------+----------------------+ | id | title | author | |----+--------------------------+----------------------| | 1 | The House at Pooh Corner | Alan Alexander Milne | +----+--------------------------+----------------------+
The multi_match function also supports an alternative syntax:
os> SELECT firstname FROM accounts WHERE firstname = multi_match('Hattie');
fetched rows / total rows = 1/1
+-----------+
| firstname |
|-----------|
| Hattie |
+-----------+
os> SELECT firstname FROM accounts WHERE firstname = multimatch('Hattie');
fetched rows / total rows = 1/1
+-----------+
| firstname |
|-----------|
| Hattie |
+-----------+
simple_query_string([field_expression+], query_expression[, option=<option_value>]*)
The simple_query_string function maps to the simple_query_string query used in search engine, to return the documents that match a provided text, number, date or boolean value with a given field or fields.
The ^ lets you boost certain fields. Boosts are multipliers that weigh matches in one field more heavily than matches in other fields. The syntax allows to specify the fields in double quotes, single quotes, in backtick or even without any wrap. All fields search using star "*" is also available (star symbol should be wrapped). The weight is optional and should be specified using after the field name, it could be delimeted by the caret character or by whitespace. Please, refer to examples below:
simple_query_string(["Tags" ^ 2, 'Title' 3.4, `Body`, Comments ^ 0.3], ...)simple_query_string(["*"], ...)Available parameters include:
- analyze_wildcard
- analyzer
- auto_generate_synonyms_phrase
- flags
- fuzziness
- fuzzy_max_expansions
- fuzzy_prefix_length
- fuzzy_transpositions
- lenient
- default_operator
- minimum_should_match
- quote_field_suffix
- boost
Example with only fields and query expressions, and all other parameters are set default values:
os> select id, title, author from books where simple_query_string(['title'], 'Pooh House'); fetched rows / total rows = 2/2 +----+--------------------------+----------------------+ | id | title | author | |----+--------------------------+----------------------| | 1 | The House at Pooh Corner | Alan Alexander Milne | | 2 | Winnie-the-Pooh | Alan Alexander Milne | +----+--------------------------+----------------------+
Another example to show how to set custom values for the optional parameters:
os> select id, title, author from books where simple_query_string(['title'], 'Pooh House', flags='ALL', default_operator='AND'); fetched rows / total rows = 1/1 +----+--------------------------+----------------------+ | id | title | author | |----+--------------------------+----------------------| | 1 | The House at Pooh Corner | Alan Alexander Milne | +----+--------------------------+----------------------+
query_string([field_expression+], query_expression[, option=<option_value>]*)
The query_string function maps to the query_string query used in search engine, to return the documents that match a provided text, number, date or boolean value with a given field or fields.
The ^ lets you boost certain fields. Boosts are multipliers that weigh matches in one field more heavily than matches in other fields. The syntax allows to specify the fields in double quotes, single quotes, backticks or without any wrap. All fields search using star "*" is also available (star symbol should be wrapped). The weight is optional and should be specified after the field name, it could be delimeted by the caret character or by whitespace. Please refer to examples below:
query_string(["Tags" ^ 2, 'Title' 3.4, `Body`, Comments ^ 0.3], ...)query_string(["*"], ...)Available parameters include:
- analyzer
- escape
- allow_leading_wildcard
- analyze_wildcard
- auto_generate_synonyms_phrase_query
- boost
- default_operator
- enable_position_increments
- fuzziness
- fuzzy_max_expansions
- fuzzy_prefix_length
- fuzzy_transpositions
- fuzzy_rewrite
- tie_breaker
- lenient
- type
- max_determinized_states
- minimum_should_match
- quote_analyzer
- phrase_slop
- quote_field_suffix
- rewrite
- time_zone
Example with only fields and query expressions, and all other parameters are set default values:
os> select id, title, author from books where query_string(['title'], 'Pooh House'); fetched rows / total rows = 2/2 +----+--------------------------+----------------------+ | id | title | author | |----+--------------------------+----------------------| | 1 | The House at Pooh Corner | Alan Alexander Milne | | 2 | Winnie-the-Pooh | Alan Alexander Milne | +----+--------------------------+----------------------+
Another example to show how to set custom values for the optional parameters:
os> select id, title, author from books where query_string(['title'], 'Pooh House', default_operator='AND'); fetched rows / total rows = 1/1 +----+--------------------------+----------------------+ | id | title | author | |----+--------------------------+----------------------| | 1 | The House at Pooh Corner | Alan Alexander Milne | +----+--------------------------+----------------------+
query("query_expression" [, option=<option_value>]*)
The query function is an alternative syntax to the query_string function. It maps to the query_string query used in search engine, to return the documents that match a provided text, number, date or boolean value with a given query expression.
query_expression must be a string provided in Lucene query string syntax. Please refer to examples below:
query('Tags:taste OR Body:taste', ...)query("Tags:taste AND Body:taste", ...)Available parameters include:
- analyzer
- escape
- allow_leading_wildcard
- analyze_wildcard
- auto_generate_synonyms_phrase_query
- boost
- default_operator
- enable_position_increments
- fuzziness
- fuzzy_max_expansions
- fuzzy_prefix_length
- fuzzy_transpositions
- fuzzy_rewrite
- tie_breaker
- lenient
- type
- max_determinized_states
- minimum_should_match
- quote_analyzer
- phrase_slop
- quote_field_suffix
- rewrite
- time_zone
Example with only query_expressions, and all other parameters are set default values:
os> select id, title, author from books where query('title:Pooh House');
fetched rows / total rows = 2/2
+----+--------------------------+----------------------+
| id | title | author |
|----+--------------------------+----------------------|
| 1 | The House at Pooh Corner | Alan Alexander Milne |
| 2 | Winnie-the-Pooh | Alan Alexander Milne |
+----+--------------------------+----------------------+
Another example to show how to set custom values for the optional parameters:
os> select id, title, author from books where query('title:Pooh House', default_operator='AND');
fetched rows / total rows = 1/1
+----+--------------------------+----------------------+
| id | title | author |
|----+--------------------------+----------------------|
| 1 | The House at Pooh Corner | Alan Alexander Milne |
+----+--------------------------+----------------------+
score(relevance_expression[, boost])
score_query(relevance_expression[, boost])
scorequery(relevance_expression[, boost])
The SCORE() function calculates the _score of any documents matching the enclosed relevance-based expression. The SCORE() function expects one argument with an optional second argument. The first argument is the relevance-based search expression. The second argument is an optional floating-point boost to the score (the default value is 1.0).
The SCORE() function sets track_scores=true for OpenSearch requests. Without it, _score fields may return null for some relevance-based search expressions.
Please refer to examples below:
score(query('Tags:taste OR Body:taste', ...), 2.0)The score_query and scorequery functions are alternative names for the score function.
Example boosting score:
os> select id, title, author, _score from books where score(query('title:Pooh House', default_operator='AND'), 2.0);
fetched rows / total rows = 1/1
+----+--------------------------+----------------------+-----------+
| id | title | author | _score |
|----+--------------------------+----------------------+-----------|
| 1 | The House at Pooh Corner | Alan Alexander Milne | 1.5884793 |
+----+--------------------------+----------------------+-----------+
os> select id, title, author, _score from books where score(query('title:Pooh House', default_operator='AND'), 5.0) OR score(query('title:Winnie', default_operator='AND'), 1.5);
fetched rows / total rows = 2/2
+----+--------------------------+----------------------+-----------+
| id | title | author | _score |
|----+--------------------------+----------------------+-----------|
| 1 | The House at Pooh Corner | Alan Alexander Milne | 3.9711983 |
| 2 | Winnie-the-Pooh | Alan Alexander Milne | 1.1581701 |
+----+--------------------------+----------------------+-----------+
highlight(field_expression)
The highlight function maps to the highlight function used in search engine to return highlight fields for the given search. The syntax allows to specify the field in double quotes or single quotes or without any wrap. Please refer to examples below:
highlight(title)Example searching for field Tags:
os> select highlight(title) from books where query_string(['title'], 'Pooh House'); fetched rows / total rows = 2/2 +----------------------------------------------+ | highlight(title) | |----------------------------------------------| | [The <em>House</em> at <em>Pooh</em> Corner] | | [Winnie-the-<em>Pooh</em>] | +----------------------------------------------+
wildcard_query(field_expression, query_expression[, option=<option_value>]*)
The wildcard_query function maps to the wildcard_query query used in search engine. It returns documents that match provided text in the specified field.
OpenSearch supports wildcard characters * and ?. See the full description here: https://opensearch.org/docs/latest/opensearch/query-dsl/term/#wildcards.
You may include a backslash \ to escape SQL wildcard characters \% and \_.
Available parameters include:
- boost
- case_insensitive
- rewrite
For backward compatibility, wildcardquery is also supported and mapped to wildcard_query query as well.
Example with only field and query expressions, and all other parameters are set default values:
os> select Body from wildcard where wildcard_query(Body, 'test wildcard*'); fetched rows / total rows = 7/7 +-------------------------------------------+ | Body | |-------------------------------------------| | test wildcard | | test wildcard in the end of the text% | | test wildcard in % the middle of the text | | test wildcard %% beside each other | | test wildcard in the end of the text_ | | test wildcard in _ the middle of the text | | test wildcard __ beside each other | +-------------------------------------------+
Another example to show how to set custom values for the optional parameters:
os> select Body from wildcard where wildcard_query(Body, 'test wildcard*', boost=0.7, case_insensitive=true, rewrite='constant_score'); fetched rows / total rows = 8/8 +-------------------------------------------+ | Body | |-------------------------------------------| | test wildcard | | test wildcard in the end of the text% | | test wildcard in % the middle of the text | | test wildcard %% beside each other | | test wildcard in the end of the text_ | | test wildcard in _ the middle of the text | | test wildcard __ beside each other | | tEsT wIlDcArD sensitive cases | +-------------------------------------------+
nested(field | [field, path])
The nested function maps to the nested query used in search engine. It returns nested field types in documents that match the provided specified field(s).
If the user does not provide the path parameter it will be generated dynamically. For example the field user.office.cubicle would dynamically generate the path
user.office.
Example with field and path parameters:
os> SELECT nested(message.info, message) FROM nested; fetched rows / total rows = 2/2 +-------------------------------+ | nested(message.info, message) | |-------------------------------| | a | | b | +-------------------------------+
Example with field.* used in SELECT clause:
os> SELECT nested(message.*) FROM nested; fetched rows / total rows = 2/2 +------------------------+---------------------------+----------------------+ | nested(message.author) | nested(message.dayOfWeek) | nested(message.info) | |------------------------+---------------------------+----------------------| | e | 1 | a | | f | 2 | b | +------------------------+---------------------------+----------------------+
Example with field and path parameters in the SELECT and WHERE clause:
os> SELECT nested(message.info, message) FROM nested WHERE nested(message.info, message) = 'b'; fetched rows / total rows = 1/1 +-------------------------------+ | nested(message.info, message) | |-------------------------------| | b | +-------------------------------+
Example with field and path parameters in the SELECT and ORDER BY clause:
os> SELECT nested(message.info, message) FROM nested ORDER BY nested(message.info, message) DESC; fetched rows / total rows = 2/2 +-------------------------------+ | nested(message.info, message) | |-------------------------------| | b | | a | +-------------------------------+
Usage: typeof(expr) function returns name of the data type of the value that is passed to it. This can be helpful for troubleshooting or dynamically constructing SQL queries.
Argument type: ANY
Return type: STRING
Example:
os> select typeof(DATE('2008-04-14')) as `typeof(date)`, typeof(1) as `typeof(int)`, typeof(now()) as `typeof(now())`, typeof(accounts) as `typeof(column)` from people
fetched rows / total rows = 1/1
+--------------+-------------+---------------+----------------+
| typeof(date) | typeof(int) | typeof(now()) | typeof(column) |
|--------------+-------------+---------------+----------------|
| DATE | INTEGER | TIMESTAMP | OBJECT |
+--------------+-------------+---------------+----------------+