Fix COPY FROM ... WHERE for negated operators.
COPY FROM runs its WHERE clause through eval_const_expressions(),
which among other things replaces NOT above an operator with the
operator's negator, if it has one (e.g., NOT (a > 0) becomes
a <= 0). The node it builds for the negator has no opfuncid, and
since COPY FROM never calls fix_opfuncids() on the clause, nothing
fills it in before the executor needs it. So
COPY tab FROM stdin WHERE NOT (a > 0)
fails with "cache lookup failed for function 0".
To fix, call fix_opfuncids() on the clause, as the relcache does
for index predicates.
Oversight in commit 31f3817402.
Reviewed-by: Tom Lane <[email protected]>
Discussion: https://postgr.es/m/asPZRTci4oBvxR9A%40nathan
Backpatch-through: 14
Branch
------
REL_16_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/1955fd0b48e2a1251d0a6adb73f0cfd3e4b2a8b5
Modified Files
--------------
src/backend/commands/copy.c | 2 ++
src/test/regress/expected/copy2.out | 7 ++++++-
src/test/regress/sql/copy2.sql | 6 ++++++
3 files changed, 14 insertions(+), 1 deletion(-)
