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Don't choke when exec_move_row assigns a synthesized null to a column

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that happens to be composite itself.  Per bug #5314 from Oleg Serov.

Backpatch to 8.0 --- 7.4 has got too many other shortcomings in
composite-type support to make this worth worrying about in that branch.
This commit is contained in:
Tom Lane 2010-02-12 19:37:36 +00:00
parent 1b04b8f1bc
commit 3ad7dbb1b9
1 changed files with 18 additions and 13 deletions
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31
src/pl/plpgsql/src/pl_exec.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/pl/plpgsql/src/pl_exec.c,v 1.254 2010/01/19 01:35:31 tgl Exp $
* $PostgreSQL: pgsql/src/pl/plpgsql/src/pl_exec.c,v 1.255 2010/02/12 19:37:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -3520,11 +3520,6 @@ exec_assign_value(PLpgSQL_execstate *estate,
*/
PLpgSQL_row *row = (PLpgSQL_row *) target;
/* Source must be of RECORD or composite type */
if (!type_is_rowtype(valtype))
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("cannot assign non-composite value to a row variable")));
if (*isNull)
{
/* If source is null, just assign nulls to the row */
@ -3538,7 +3533,12 @@ exec_assign_value(PLpgSQL_execstate *estate,
TupleDesc tupdesc;
HeapTupleData tmptup;
/* Else source is a tuple Datum, safe to do this: */
/* Source must be of RECORD or composite type */
if (!type_is_rowtype(valtype))
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("cannot assign non-composite value to a row variable")));
/* Source is a tuple Datum, so safe to do this: */
td = DatumGetHeapTupleHeader(value);
/* Extract rowtype info and find a tupdesc */
tupType = HeapTupleHeaderGetTypeId(td);
@ -3562,11 +3562,6 @@ exec_assign_value(PLpgSQL_execstate *estate,
*/
PLpgSQL_rec *rec = (PLpgSQL_rec *) target;
/* Source must be of RECORD or composite type */
if (!type_is_rowtype(valtype))
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("cannot assign non-composite value to a record variable")));
if (*isNull)
{
/* If source is null, just assign nulls to the record */
@ -3580,7 +3575,13 @@ exec_assign_value(PLpgSQL_execstate *estate,
TupleDesc tupdesc;
HeapTupleData tmptup;
/* Else source is a tuple Datum, safe to do this: */
/* Source must be of RECORD or composite type */
if (!type_is_rowtype(valtype))
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("cannot assign non-composite value to a record variable")));
/* Source is a tuple Datum, so safe to do this: */
td = DatumGetHeapTupleHeader(value);
/* Extract rowtype info and find a tupdesc */
tupType = HeapTupleHeaderGetTypeId(td);
@ -4759,6 +4760,10 @@ exec_move_row(PLpgSQL_execstate *estate,
{
value = (Datum) 0;
isnull = true;
/*
* InvalidOid is OK because exec_assign_value doesn't care
* about the type of a source NULL
*/
valtype = InvalidOid;
}