fix:full outer join with string_agg function panic (#12995)

Co-authored-by: sundyli <[email protected]>
Co-authored-by: Jk Xu <[email protected]>

src/query/functions/src/scalars/string_multi_args.rs

@@ -877,6 +877,7 @@ fn regexp_substr_fn(args: &[ValueRef<AnyType>], ctx: &mut EvalContext) -> Value<
         if let Err(err) = regexp::validate_regexp_arguments("regexp_substr", pos, occur, None) {
             ctx.set_error(builder.len(), err);
             StringType::push_default(&mut builder);
+            validity.push(false);
             continue;
         }
 
@@ -898,6 +899,7 @@ fn regexp_substr_fn(args: &[ValueRef<AnyType>], ctx: &mut EvalContext) -> Value<
                 Err(err) => {
                     ctx.set_error(builder.len(), err);
                     StringType::push_default(&mut builder);
+                    validity.push(false);
                     continue;
                 }
             }

tests/sqllogictests/suites/query/02_function/02_0052_function_string_regexp_substr

@@ -72,3 +72,31 @@ CREATE TABLE t1(s String NULL, pat String NULL, pos Int64 NULL, occu Int64 NULL,
 statement ok
 INSERT INTO t1 (s, pat, pos, occu, mt) VALUES (NULL, '[a-z]+', 1, 1, ''), ('abc def ghi', NULL, 1, 1, 'c'), ('abc def ghi', '[a-z]+', NULL, 1, 'c'), ('abc def ghi', '[a-z]+', 1, NULL, 'c'), ('abc def ghi', '[a-z]+', 1, 1, NULL), ('abc def ghi', '[a-z]+', 1, 1, 'c')
 
+statement ok
+DROP TABLE IF EXISTS tt1
+
+statement ok
+CREATE TABLE tt1(a boolean not null, b int not null, c int64 not null, d string not null) Engine = Fuse
+
+statement ok
+INSERT INTO tt1 VALUES (true,826203185,-3958367336395157675,'Jd695'),(true,-1439480114,-4881196055243782954,'Lzcda'),(true,-1439480114,-4881196055243782954,'Lzcda'),(false,733863457,6458421525263813535,'m8maS'),(true,-739644074,4390046195034875158,'zWvEj'),(true,-1611495410,-2002171580743726810,'rtOs8')
+
+statement ok
+DROP TABLE IF EXISTS tt2
+
+statement ok
+CREATE TABLE tt2(b int not null) Engine = Fuse
+
+statement ok
+INSERT INTO tt2 VALUES (-1448403955),(1978682043),(775979323),(-2057711809),(183393966),(618200641)
+
+statement error 1001
+SELECT string_agg(regexp_substr(tt1.d, '-', tt1.c)), tt1.a FROM tt1 FULL OUTER JOIN tt2 USING(b) GROUP BY ROLLUP (tt1.a)
+
+
+statement ok
+DROP TABLE IF EXISTS tt1
+
+
+statement ok
+DROP TABLE IF EXISTS tt2