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Don't needlessly check the partition contraint twice

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Starting with commit f0e44751d7, ExecConstraints was in charge of
running the partition constraint; commit 19c47e7c82 modified that so
that caller could request to skip that checking depending on some
conditions, but that commit and 15ce775faa together introduced a small
bug there which caused ExecInsert to request skipping the constraint
check but have this not be honored -- in effect doing the check twice.
This could have been fixed in a very small patch, but on further
analysis of the involved function and its callsites, it turns out to be
simpler to give the responsibility of checking the partition constraint
fully to the caller, and return ExecConstraints to its original
(pre-partitioning) shape where it only checked tuple descriptor-related
constraints.  Each caller must do partition constraint checking on its
own schedule, which is more convenient after commit 2f17844104 anyway.

Reported-by: David Rowley
Author: David Rowley, Álvaro Herrera
Reviewed-by: Amit Langote, Amit Khandekar, Simon Riggs
Discussion: https://postgr.es/m/CAKJS1f8w8+awsxgea8wt7_UX8qzOQ=Tm1LD+U1fHqBAkXxkW2w@mail.gmail.com
This commit is contained in:
Alvaro Herrera
2018-06-11 16:53:33 -04:00
parent 85dd744a70
commit 5b0c7e2f75
6 changed files with 56 additions and 62 deletions
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8
src/backend/executor/execReplication.c
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@ -413,7 +413,9 @@ ExecSimpleRelationInsert(EState *estate, TupleTableSlot *slot)
/* Check the constraints of the tuple */
if (rel->rd_att->constr)
ExecConstraints(resultRelInfo, slot, estate, true);
ExecConstraints(resultRelInfo, slot, estate);
if (resultRelInfo->ri_PartitionCheck)
ExecPartitionCheck(resultRelInfo, slot, estate, true);
/* Store the slot into tuple that we can inspect. */
tuple = ExecMaterializeSlot(slot);
@ -478,7 +480,9 @@ ExecSimpleRelationUpdate(EState *estate, EPQState *epqstate,
/* Check the constraints of the tuple */
if (rel->rd_att->constr)
ExecConstraints(resultRelInfo, slot, estate, true);
ExecConstraints(resultRelInfo, slot, estate);
if (resultRelInfo->ri_PartitionCheck)
ExecPartitionCheck(resultRelInfo, slot, estate, true);
/* Store the slot into tuple that we can write. */
tuple = ExecMaterializeSlot(slot);