mirror of
https://git.postgresql.org/git/postgresql.git
synced 2026-02-06 10:27:31 +08:00
1fd0c59e25
to plan nodes, not vice-versa. All executor state nodes now inherit from struct PlanState. Copying of plan trees has been simplified by not storing a list of SubPlans in Plan nodes (eliminating duplicate links). The executor still needs such a list, but it can build it during ExecutorStart since it has to scan the plan tree anyway. No initdb forced since no stored-on-disk structures changed, but you will need a full recompile because of node-numbering changes.
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* execdesc.h
|
|
* plan and query descriptor accessor macros used by the executor
|
|
* and related modules.
|
|
*
|
|
*
|
|
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
* $Id: execdesc.h,v 1.21 2002/12/05 15:50:36 tgl Exp $
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
#ifndef EXECDESC_H
|
|
#define EXECDESC_H
|
|
|
|
#include "nodes/parsenodes.h"
|
|
#include "nodes/execnodes.h"
|
|
#include "tcop/dest.h"
|
|
|
|
|
|
/* ----------------
|
|
* query descriptor:
|
|
*
|
|
* a QueryDesc encapsulates everything that the executor
|
|
* needs to execute the query
|
|
* ---------------------
|
|
*/
|
|
typedef struct QueryDesc
|
|
{
|
|
/* These fields are provided by CreateQueryDesc */
|
|
CmdType operation; /* CMD_SELECT, CMD_UPDATE, etc. */
|
|
Query *parsetree; /* rewritten parsetree */
|
|
Plan *plantree; /* planner's output */
|
|
CommandDest dest; /* the destination output of the execution */
|
|
const char *portalName; /* name of portal, or NULL */
|
|
ParamListInfo params; /* param values being passed in */
|
|
bool doInstrument; /* TRUE requests runtime instrumentation */
|
|
|
|
/* These fields are set by ExecutorStart */
|
|
TupleDesc tupDesc; /* descriptor for result tuples */
|
|
EState *estate; /* executor's query-wide state */
|
|
PlanState *planstate; /* tree of per-plan-node state */
|
|
} QueryDesc;
|
|
|
|
/* in pquery.c */
|
|
extern QueryDesc *CreateQueryDesc(Query *parsetree, Plan *plantree,
|
|
CommandDest dest, const char *portalName,
|
|
ParamListInfo params,
|
|
bool doInstrument);
|
|
|
|
#endif /* EXECDESC_H */
|