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Return NULL from json_object_agg if it gets no rows.

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This makes it consistent with the docs and with all other builtin
aggregates apart from count().
This commit is contained in:
Andrew Dunstan 2014-09-25 08:18:18 -04:00
parent b0d81adea6
commit ecacbdbcee
1 changed files with 1 additions and 1 deletions
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2
src/backend/utils/adt/json.c
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@ -1948,7 +1948,7 @@ json_object_agg_finalfn(PG_FUNCTION_ARGS)
state = PG_ARGISNULL(0) ? NULL : (StringInfo) PG_GETARG_POINTER(0);
if (state == NULL)
PG_RETURN_TEXT_P(cstring_to_text("{}"));
PG_RETURN_NULL();
appendStringInfoString(state, " }");