database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-11-22 12:22:45 +03:00
Code Activity

SQL-language functions are now callable in ordinary fmgr contexts ...

Browse Source 
for example, an SQL function can be used in a functional index.  (I make
no promises about speed, but it'll work ;-).)  Clean up and simplify
handling of functions returning sets.
This commit is contained in:
Tom Lane
2000-08-24 03:29:15 +00:00
parent 87523ab8db
commit 782c16c6a1
35 changed files with 889 additions and 921 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
src/include/nodes/execnodes.h
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: execnodes.h,v 1.47 2000/08/22 04:06:22 tgl Exp $
* $Id: execnodes.h,v 1.48 2000/08/24 03:29:13 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -120,6 +120,31 @@ typedef struct ExprContext
List *ecxt_range_table;
} ExprContext;
/*
* Set-result status returned by ExecEvalExpr()
*/
typedef enum
{
ExprSingleResult, /* expression does not return a set */
ExprMultipleResult, /* this result is an element of a set */
ExprEndResult /* there are no more elements in the set */
} ExprDoneCond;
/*
* When calling a function that might return a set (multiple rows),
* a node of this type is passed as fcinfo->resultinfo to allow
* return status to be passed back. A function returning set should
* raise an error if no such resultinfo is provided.
*
* XXX this mechanism is a quick hack and probably needs to be redesigned.
*/
typedef struct ReturnSetInfo
{
NodeTag type;
ExprDoneCond isDone;
} ReturnSetInfo;
/* ----------------
* ProjectionInfo node information
*

6
src/include/nodes/nodes.h
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: nodes.h,v 1.74 2000/08/11 23:46:54 tgl Exp $
* $Id: nodes.h,v 1.75 2000/08/24 03:29:13 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -227,7 +227,9 @@ typedef enum NodeTag
* TAGS FOR FUNCTION-CALL CONTEXT AND RESULTINFO NODES (cf. fmgr.h)
*---------------------
*/
T_TriggerData = 800 /* in commands/trigger.h */
T_TriggerData = 800, /* in commands/trigger.h */
T_ReturnSetInfo /* in nodes/execnodes.h */
} NodeTag;
/*

7
src/include/nodes/primnodes.h
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: primnodes.h,v 1.46 2000/08/08 15:42:59 tgl Exp $
* $Id: primnodes.h,v 1.47 2000/08/24 03:29:13 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -16,7 +16,10 @@
#include "access/attnum.h"
#include "nodes/pg_list.h"
#include "utils/fcache.h"
/* FunctionCache is declared in utils/fcache.h */
typedef struct FunctionCache *FunctionCachePtr;
/* ----------------------------------------------------------------
* node definitions