diff --git a/src/pl/plpgsql/src/pl_exec.c b/src/pl/plpgsql/src/pl_exec.c
index fd62d73174e..560639a87d3 100644
--- a/src/pl/plpgsql/src/pl_exec.c
+++ b/src/pl/plpgsql/src/pl_exec.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/pl/plpgsql/src/pl_exec.c,v 1.180.2.11 2009/12/29 17:41:25 heikki Exp $
+ *	  $PostgreSQL: pgsql/src/pl/plpgsql/src/pl_exec.c,v 1.180.2.12 2010/02/12 19:38:00 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -3303,12 +3303,6 @@ exec_assign_value(PLpgSQL_execstate *estate,
 				 */
 				PLpgSQL_row *row = (PLpgSQL_row *) target;
 
-				/* Source must be of RECORD or composite type */
-				if (!(valtype == RECORDOID ||
-					  get_typtype(valtype) == 'c'))
-					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 */
@@ -3322,7 +3316,13 @@ 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 (!(valtype == RECORDOID ||
+						  get_typtype(valtype) == 'c'))
+						ereport(ERROR,
+								(errcode(ERRCODE_DATATYPE_MISMATCH),
+								 errmsg("cannot assign non-composite value to a row variable")));
+					/* So source is a tuple Datum, safe to do this: */
 					td = DatumGetHeapTupleHeader(value);
 					/* Extract rowtype info and find a tupdesc */
 					tupType = HeapTupleHeaderGetTypeId(td);
@@ -3346,12 +3346,6 @@ exec_assign_value(PLpgSQL_execstate *estate,
 				 */
 				PLpgSQL_rec *rec = (PLpgSQL_rec *) target;
 
-				/* Source must be of RECORD or composite type */
-				if (!(valtype == RECORDOID ||
-					  get_typtype(valtype) == 'c'))
-					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 */
@@ -3365,7 +3359,13 @@ 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 (!(valtype == RECORDOID ||
+						  get_typtype(valtype) == 'c'))
+						ereport(ERROR,
+								(errcode(ERRCODE_DATATYPE_MISMATCH),
+								 errmsg("cannot assign non-composite value to a record variable")));
+					/* So source is a tuple Datum, safe to do this: */
 					td = DatumGetHeapTupleHeader(value);
 					/* Extract rowtype info and find a tupdesc */
 					tupType = HeapTupleHeaderGetTypeId(td);