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Fix style violations in syscache lookups.

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Project style is to check the success of SearchSysCacheN and friends
by applying HeapTupleIsValid to the result.  A tiny minority of calls
creatively did it differently.  Bring them into line with the rest.

This is just cosmetic, since HeapTupleIsValid is indeed just a null
check at the moment ... but that may not be true forever, and in any
case it puts a mental burden on readers who may wonder why these
call sites are not like the rest.

Back-patch to v11 just to keep the branches in sync.  (The bulk of these
errors seem to have originated in v11 or v12, though a few are old.)

Per searching to see if anyplace else had made the same error
repaired in 62148c352.
This commit is contained in:
Tom Lane
2019-05-05 13:10:07 -04:00
parent 030ad0acfa
commit 000f557c31
6 changed files with 11 additions and 12 deletions
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2
src/backend/optimizer/util/plancat.c
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@ -1335,7 +1335,7 @@ get_relation_statistics(RelOptInfo *rel, Relation relation)
int i;
htup = SearchSysCache1(STATEXTOID, ObjectIdGetDatum(statOid));
if (!htup)
if (!HeapTupleIsValid(htup))
elog(ERROR, "cache lookup failed for statistics object %u", statOid);
staForm = (Form_pg_statistic_ext) GETSTRUCT(htup);