SQL/JSON: Correctly enforce the default ON EMPTY behavior
Currently, when the ON EMPTY clause is not present, the ON ERROR
clause (implicit or explicit) dictates the behavior when jsonpath
evaluation in ExecEvalJsonExprPath() results in an empty sequence.
That is an oversight in the commit 6185c97
SQL/JSON: Correct jsonpath variable name matching
Previously, GetJsonPathVar() allowed a jsonpath expression to
reference any prefix of a PASSING variable's name. For example, the
following query would incorrectly work:
SELECT JSON_QUERY(context_item, jsonpath '$xy' PASSING val AS xyz);
The fix
Fix comment in pg_upgrade.h.
Contrary to what the comment for the "check" struct member claims,
'pg_upgrade --check' performs only the checks and does not ask the
user for permission to make changes.
Reviewed-by: Daniel Gustafsson
Discussion: https://postgr.es/m/ZnHk7ci5IuTWVc_c%40nathan
Branch
