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-rw-r--r--src/test/regress/sql/sqljson.sql14
1 files changed, 14 insertions, 0 deletions
diff --git a/src/test/regress/sql/sqljson.sql b/src/test/regress/sql/sqljson.sql
index 42dbec26d6f..9b5d82602d0 100644
--- a/src/test/regress/sql/sqljson.sql
+++ b/src/test/regress/sql/sqljson.sql
@@ -480,3 +480,17 @@ SELECT JSON_OBJECTAGG(i: ('111' || i)::bytea FORMAT JSON WITH UNIQUE RETURNING v
CREATE DOMAIN sqljson_char2 AS char(2) CHECK (VALUE NOT IN ('12'));
SELECT JSON_SERIALIZE('123' RETURNING sqljson_char2);
SELECT JSON_SERIALIZE('12' RETURNING sqljson_char2);
+
+-- Bug #18657: JsonValueExpr.raw_expr was not initialized in ExecInitExprRec()
+-- causing the Aggrefs contained in it to also not be initialized, which led
+-- to a crash in ExecBuildAggTrans() as mentioned in the bug report:
+-- https://postgr.es/m/18657-1b90ccce2b16bdb8@postgresql.org
+CREATE FUNCTION volatile_one() RETURNS int AS $$ BEGIN RETURN 1; END; $$ LANGUAGE plpgsql VOLATILE;
+CREATE FUNCTION stable_one() RETURNS int AS $$ BEGIN RETURN 1; END; $$ LANGUAGE plpgsql STABLE;
+EXPLAIN (VERBOSE, COSTS OFF) SELECT JSON_OBJECT('a': JSON_OBJECTAGG('b': volatile_one() RETURNING text) FORMAT JSON);
+SELECT JSON_OBJECT('a': JSON_OBJECTAGG('b': volatile_one() RETURNING text) FORMAT JSON);
+EXPLAIN (VERBOSE, COSTS OFF) SELECT JSON_OBJECT('a': JSON_OBJECTAGG('b': stable_one() RETURNING text) FORMAT JSON);
+SELECT JSON_OBJECT('a': JSON_OBJECTAGG('b': stable_one() RETURNING text) FORMAT JSON);
+EXPLAIN (VERBOSE, COSTS OFF) SELECT JSON_OBJECT('a': JSON_OBJECTAGG('b': 1 RETURNING text) FORMAT JSON);
+SELECT JSON_OBJECT('a': JSON_OBJECTAGG('b': 1 RETURNING text) FORMAT JSON);
+DROP FUNCTION volatile_one, stable_one;