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Allow whole-row Vars to be used in partitioning expressions.

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In the wake of commit 5b9312378, there's no particular reason
for this restriction (previously, it was problematic because of
the implied rowtype reference).  A simple constraint on a whole-row
Var probably isn't that useful, but conceivably somebody would want
to pass one to a function that extracts a partitioning key.  Besides
which, we're expending much more code to enforce the restriction than
we save by having it, since the latter quantity is now zero.
So drop the restriction.

Amit Langote

Discussion: https://postgr.es/m/CA+HiwqFUzjfj9HEsJtYWcr1SgQ_=iCAvQ=O2Sx6aQxoDu4OiHw@mail.gmail.com
This commit is contained in:
Tom Lane
2019-12-25 15:44:15 -05:00
parent 42f74f4936
commit bb4114a4e2
8 changed files with 64 additions and 77 deletions
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11
src/backend/commands/trigger.c
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@ -1144,7 +1144,6 @@ CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
CreateTrigStmt *childStmt;
Relation childTbl;
Node *qual;
bool found_whole_row;
childTbl = table_open(partdesc->oids[i], ShareRowExclusiveLock);
@ -1177,16 +1176,10 @@ CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
qual = copyObject(whenClause);
qual = (Node *)
map_partition_varattnos((List *) qual, PRS2_OLD_VARNO,
childTbl, rel,
&found_whole_row);
if (found_whole_row)
elog(ERROR, "unexpected whole-row reference found in trigger WHEN clause");
childTbl, rel);
qual = (Node *)
map_partition_varattnos((List *) qual, PRS2_NEW_VARNO,
childTbl, rel,
&found_whole_row);
if (found_whole_row)
elog(ERROR, "unexpected whole-row reference found in trigger WHEN clause");
childTbl, rel);
CreateTrigger(childStmt, queryString,
partdesc->oids[i], refRelOid,