SQL Query Builder

A fluent SQL Query Builder which ONLY builds a valid SQL query with the SQL clauses it has been asked to provide.

Installing

composer require girgias/query-builder

Features

This Query Builder can build a variety of SQL queries which are database agnostic as it uses the ANSI standardized syntax.

Every sort of query has its own class which extends from the base Query class, They all have the same constructor signature which requires the table name on which to execute the query.

To build a SELECT query with table join use the SelectJoin class. An example can be seen below on how to use this class.

It is possible to directly provide scalar values to WHERE clauses and while binding a field. It is also possible to specify the named parameter against which the value will be bounded. In case no named parameter has been provided a random one will be generated.

To retrieve the named parameters with their associated values use the getParameters method which will return an associative array parameter => value.

Examples

A basic SELECT query:

$query = (new \Girgias\QueryBuilder\Select('demo'))
    ->limit(10, 20)
    ->order('published_date')
    ->getQuery();

Will output:

SELECT * FROM demo ORDER BY published_date ASC LIMIT 10 OFFSET 20

A more complex SELECT query:

$start = new \DateTime('01/01/2016');
$end = new \DateTime('01/01/2017');
$query = (new \Girgias\QueryBuilder\Select('demo'))
    ->select('title', 'slug')
    ->selectAs('name_author_post', 'author')
    ->whereBetween('date_published', $start, $end)
    ->order('date_published', 'DESC')
    ->limit(25)
    ->getQuery();

Will output:

SELECT title, slug, name_author_post AS author FROM demo WHERE date_published BETWEEN '2016-01-01 00:00:00' AND '2017-01-01 00:00:00' ORDER BY date_published DESC LIMIT 25

An example with the whereOr method:

$query = (new \Girgias\QueryBuilder\Select('demo'))
    ->where('author', '=', 'Alice', 'author')
    ->whereOr('editor', '=', 'Alice', 'editor')
    ->getQuery();

Will output:

SELECT * FROM demo WHERE (author = :author OR editor = :editor)

UPDATE query example:

$query = (new \Girgias\QueryBuilder\Update('posts'))
    ->where('id', '=', 1, 'id')
    ->bindField('title', 'This is a title', 'title')
    ->bindField('content', 'Hello World', 'content')
    ->bindField('date_last_edited', (new \DateTimeImmutable()), 'nowDate')
    ->getQuery();

Will output:

UPDATE posts SET title = :title, content = :content, date_last_edited = :now_date WHERE id = :id

A SELECT query with an INNER JOIN:

$query = (new \Girgias\QueryBuilder\SelectJoin('comments', 'posts'))
    ->tableAlias('co')
    ->select('co.user', 'co.content', 'p.title')
    ->joinTableAlias('p')
    ->innerJoin('post_id', 'id')
    ->getQuery();

Will output:

SELECT co.user, co.content, p.title FROM comments AS co INNER JOIN posts AS p ON comments.post_id = posts.id

Future scope

Possible features that will be added to this library

• WHERE subqueries

Contributing

If you found an invalid SQL name which DOESN'T throw a Runtime exception or a valid SQL name which does please add a test case into the tests/CheckSqlNamesTest.php file.

If you found an example where this library returns an invalid SQL query please add (or fix) a test case in the relevant Query test case or if it's a general error please use the tests/QueryTest file.

If a RunTime exception should be thrown please add a test in the relevant test file or if it is specific to SELECT Query please add a test in the tests/SelectThrowExceptionsTest.php file.

If you'd like to contribute, please fork the repository and use a feature branch. Pull requests are warmly welcome.

Notes

When contributing please assure that Psalm runs without error and all unit tests pass. Moreover if you add functionality please add corresponding unit tests to cover at least 90% of your code and that these tests cover any edge cases if they exist.

Links

• Repository: https://github.com/girgias/query-builder/
• Issue tracker: https://github.com/girgias/query-builder/issues
  • In case of sensitive bugs like security vulnerabilities, please contact [email protected] directly instead of using the issue tracker.

Licensing

The code in this project is licensed under MIT license.