From 774c47de1b3bfdd022c0ba9ec0ed77c0d62c805b Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Thu, 22 Oct 2026 13:51:27 -0400 Subject: [PATCH] Accept empty tsquery in binary input. tsqueryrecv() calls findoprnd() even when the input has no query items, so it fails on an empty tsquery, which is legal data. This breaks, for example, binary COPY of a table containing an empty tsquery. Skip the operand walk for an empty query, as parse_tsquery() does. Bug: #19778 Reported-by: Shay Rojansky Author: Ayush Tiwari Reviewed-by: Tom Lane Discussion: https://postgr.es/m/19778-1befc1fba593ab1b@postgresql.org Backpatch-through: 14 --- src/backend/utils/adt/tsquery.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/src/backend/utils/adt/tsquery.c b/src/backend/utils/adt/tsquery.c index 7f305235951..6c1e2312189 100644 --- a/src/backend/utils/adt/tsquery.c +++ b/src/backend/utils/adt/tsquery.c @@ -1343,10 +1343,13 @@ tsqueryrecv(PG_FUNCTION_ARGS) * Fill in the left-pointers. Checks that the tree is well-formed as a * side-effect. */ - findoprnd(item, size, &needcleanup); + if (size > 0) + { + findoprnd(item, size, &needcleanup); - /* Can't have found any QI_VALSTOP nodes */ - Assert(!needcleanup); + /* Can't have found any QI_VALSTOP nodes */ + Assert(!needcleanup); + } /* Copy operands to output struct */ for (i = 0; i < size; i++)