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Accept empty tsquery in binary input.

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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 <roji@roji.org>
Author: Ayush Tiwari <ayushtiwari.slg01@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/19778-1befc1fba593ab1b@postgresql.org
Backpatch-through: 14
This commit is contained in:
Tom Lane
2026-10-22 13:51:27 -04:00
parent 58998c33d1
commit 6c4172b34d
1 changed files with 6 additions and 3 deletions
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9
src/backend/utils/adt/tsquery.c
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@@ -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++)