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SQL/JSON: Fix default ON ERROR behavior for JSON_TABLE

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Use EMPTY ARRAY instead of EMPTY.

This change does not affect the runtime behavior of JSON_TABLE(),
which continues to return an empty relation ON ERROR. It only alters
whether the default ON ERROR behavior is shown in the deparsed output.

Reported-by: Jian He <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CACJufxEo4sUjKCYtda0_qt9tazqqKPmF1cqhW9KBOUeJFqQd2g@mail.gmail.com
Backpatch-through: 17
This commit is contained in:
Amit Langote
2024-09-06 13:25:14 +09:00
parent ee75a03f37
commit bbd4c058a8
4 changed files with 34 additions and 3 deletions
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4
src/backend/parser/parse_expr.c
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@ -4603,13 +4603,13 @@ transformJsonFuncExpr(ParseState *pstate, JsonFuncExpr *func)
}
/*
* Assume EMPTY ON ERROR when ON ERROR is not specified.
* Assume EMPTY ARRAY ON ERROR when ON ERROR is not specified.
*
* ON EMPTY cannot be specified at the top level but it can be for
* the individual columns.
*/
jsexpr->on_error = transformJsonBehavior(pstate, func->on_error,
JSON_BEHAVIOR_EMPTY,
JSON_BEHAVIOR_EMPTY_ARRAY,
jsexpr->returning);
break;