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Expose more cursor-related functionality in SPI: specifically, allow

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access to the planner's cursor-related planning options, and provide new
FETCH/MOVE routines that allow access to the full power of those commands.
Small refactoring of planner(), pg_plan_query(), and pg_plan_queries()
APIs to make it convenient to pass the planning options down from SPI.

This is the core-code portion of Pavel Stehule's patch for scrollable
cursor support in plpgsql; I'll review and apply the plpgsql changes
separately.
This commit is contained in:
Tom Lane
2007-04-16 01:14:58 +00:00
parent fa92d21a48
commit 66888f7424
15 changed files with 435 additions and 71 deletions
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13
src/include/nodes/parsenodes.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.345 2007/04/12 06:53:48 neilc Exp $
* $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.346 2007/04/16 01:14:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1429,11 +1429,12 @@ typedef struct CommentStmt
* Declare Cursor Statement
* ----------------------
*/
#define CURSOR_OPT_BINARY 0x0001
#define CURSOR_OPT_SCROLL 0x0002
#define CURSOR_OPT_NO_SCROLL 0x0004
#define CURSOR_OPT_INSENSITIVE 0x0008
#define CURSOR_OPT_HOLD 0x0010
#define CURSOR_OPT_BINARY 0x0001 /* BINARY */
#define CURSOR_OPT_SCROLL 0x0002 /* SCROLL explicitly given */
#define CURSOR_OPT_NO_SCROLL 0x0004 /* NO SCROLL explicitly given */
#define CURSOR_OPT_INSENSITIVE 0x0008 /* INSENSITIVE (unimplemented) */
#define CURSOR_OPT_HOLD 0x0010 /* WITH HOLD */
#define CURSOR_OPT_FAST_PLAN 0x0020 /* prefer fast-start plan */
typedef struct DeclareCursorStmt
{