_SPI_execute_plan failed to return result tuple table to caller in

the ProcessUtility case, resulting in an intratransaction memory leak
if a utility command actually did return any tuples, as reported by
Dmitry Karasik.  Fix this and also make the behavior more consistent
for cases involving nested SPI operations and multiple query trees,
by ensuring that we store the state locally until it is ready to be
returned to the caller.

src/include/executor/spi_priv.h

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/executor/spi_priv.h,v 1.22 2004/12/31 22:03:29 pgsql Exp $
+ * $PostgreSQL: pgsql/src/include/executor/spi_priv.h,v 1.23 2005/10/01 18:43:19 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -18,8 +18,11 @@
 
 typedef struct
 {
+	/* current results */
 	uint32		processed;		/* by Executor */
+	Oid			lastoid;
 	SPITupleTable *tuptable;
+
 	MemoryContext procCxt;		/* procedure context */
 	MemoryContext execCxt;		/* executor context */
 	MemoryContext savedcxt;