From b3cb74e43d438f8bd23dac6784a2907db8215fc5 Mon Sep 17 00:00:00 2001 From: sohardforaname Date: Fri, 11 Sep 2026 15:23:11 +0800 Subject: [PATCH 1/2] Return early from repeat() for empty results Avoid entering the copy loop when the repeat count is zero or the source string is empty. --- src/backend/utils/adt/oracle_compat.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/backend/utils/adt/oracle_compat.c b/src/backend/utils/adt/oracle_compat.c index 7422a454397..fe33a0729e4 100644 --- a/src/backend/utils/adt/oracle_compat.c +++ b/src/backend/utils/adt/oracle_compat.c @@ -1186,6 +1186,10 @@ repeat(PG_FUNCTION_ARGS) SET_VARSIZE(result, tlen); cp = VARDATA(result); sp = VARDATA_ANY(string); + + if (count == 0 || slen == 0) + PG_RETURN_TEXT_P(result); + for (i = 0; i < count; i++) { memcpy(cp, sp, slen); -- 2.34.1