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Adjust the order of the prechecks in pgrowlocks()

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4b8266415 added a precheck to pgrowlocks() to ensure the given object's
pg_class.relam is HEAP_TABLE_AM_OID, however, that check was put before
another check which was checking if the given object was a partitioned
table.  Since the pg_class.relam is always InvalidOid for partitioned
tables, if pgrowlocks() was called passing a partitioned table, then the
"only heap AM is supported" error would be raised instead of the intended
error about the given object being a partitioned table.

Here we simply move the pg_class.relam check to after the check that
verifies that we are in fact working with a normal (non-partitioned)
table.

Reported-by: jian he
Discussion: https://postgr.es/m/CACJufxFaSp_WguFCf0X98951zFVX+dXFnF1mxAb-G3g1HiHOow@mail.gmail.com
Backpatch-through: 12, where 4b8266415 was introduced.
This commit is contained in:
David Rowley 2023-10-31 16:42:08 +13:00
parent 13503eb590
commit 73635b6d63
1 changed files with 4 additions and 4 deletions
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8
contrib/pgrowlocks/pgrowlocks.c
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@ -81,10 +81,6 @@ pgrowlocks(PG_FUNCTION_ARGS)
relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname));
rel = relation_openrv(relrv, AccessShareLock);
if (rel->rd_rel->relam != HEAP_TABLE_AM_OID)
ereport(ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("only heap AM is supported")));
if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
@ -96,6 +92,10 @@ pgrowlocks(PG_FUNCTION_ARGS)
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
errmsg("\"%s\" is not a table",
RelationGetRelationName(rel))));
else if (rel->rd_rel->relam != HEAP_TABLE_AM_OID)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("only heap AM is supported")));
/*
* check permissions: must have SELECT on table or be in