upstream/postgresql
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2026-02-03 20:40:14 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions
postgresql/src/include/executor/nodeRecursiveunion.h

25 lines
895 B
C
Raw Normal View History

Implement SQL-standard WITH clauses, including WITH RECURSIVE. There are some unimplemented aspects: recursive queries must use UNION ALL (should allow UNION too), and we don't have SEARCH or CYCLE clauses. These might or might not get done for 8.4, but even without them it's a pretty useful feature. There are also a couple of small loose ends and definitional quibbles, which I'll send a memo about to pgsql-hackers shortly. But let's land the patch now so we can get on with other development. Yoshiyuki Asaba, with lots of help from Tatsuo Ishii and Tom Lane
2008-10-04 17:56:55 -04:00
/*-------------------------------------------------------------------------
*
* nodeRecursiveunion.h
*
*
*
Update copyright for the year 2010.
2010-01-02 11:58:17 -05:00
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
Implement SQL-standard WITH clauses, including WITH RECURSIVE. There are some unimplemented aspects: recursive queries must use UNION ALL (should allow UNION too), and we don't have SEARCH or CYCLE clauses. These might or might not get done for 8.4, but even without them it's a pretty useful feature. There are also a couple of small loose ends and definitional quibbles, which I'll send a memo about to pgsql-hackers shortly. But let's land the patch now so we can get on with other development. Yoshiyuki Asaba, with lots of help from Tatsuo Ishii and Tom Lane
2008-10-04 17:56:55 -04:00
* Portions Copyright (c) 1994, Regents of the University of California
*
Update copyright for the year 2010.
2010-01-02 11:58:17 -05:00
* $PostgreSQL: pgsql/src/include/executor/nodeRecursiveunion.h,v 1.4 2010/01/02 16:58:03 momjian Exp $
Implement SQL-standard WITH clauses, including WITH RECURSIVE. There are some unimplemented aspects: recursive queries must use UNION ALL (should allow UNION too), and we don't have SEARCH or CYCLE clauses. These might or might not get done for 8.4, but even without them it's a pretty useful feature. There are also a couple of small loose ends and definitional quibbles, which I'll send a memo about to pgsql-hackers shortly. But let's land the patch now so we can get on with other development. Yoshiyuki Asaba, with lots of help from Tatsuo Ishii and Tom Lane
2008-10-04 17:56:55 -04:00
*
*-------------------------------------------------------------------------
*/
#ifndef NODERECURSIVEUNION_H
#define NODERECURSIVEUNION_H
#include "nodes/execnodes.h"
extern RecursiveUnionState *ExecInitRecursiveUnion(RecursiveUnion *node, EState *estate, int eflags);
extern TupleTableSlot *ExecRecursiveUnion(RecursiveUnionState *node);
extern void ExecEndRecursiveUnion(RecursiveUnionState *node);
extern void ExecRecursiveUnionReScan(RecursiveUnionState *node, ExprContext *exprCtxt);
#endif /* NODERECURSIVEUNION_H */
Reference in a new issue Copy permalink