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are now both invoked once per received SQL command (raw parsetree) from pg_exec_query_string. BeginCommand is actually just an empty routine at the moment --- all its former operations have been pushed into tuple receiver setup routines in printtup.c. This makes for a clean distinction between BeginCommand/EndCommand (once per command) and the tuple receiver setup/teardown routines (once per ExecutorRun call), whereas the old code was quite ad hoc. Along the way, clean up the calling conventions for ExecutorRun a little bit.
46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* execdesc.h
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* plan and query descriptor accessor macros used by the executor
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* and related modules.
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*
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*
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* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: execdesc.h,v 1.18 2002/02/27 19:35:54 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef EXECDESC_H
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#define EXECDESC_H
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#include "nodes/parsenodes.h"
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#include "nodes/plannodes.h"
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#include "tcop/dest.h"
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/* ----------------
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* query descriptor:
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* a QueryDesc encapsulates everything that the executor
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* needs to execute the query
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* ---------------------
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*/
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typedef struct QueryDesc
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{
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CmdType operation; /* CMD_SELECT, CMD_UPDATE, etc. */
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Query *parsetree;
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Plan *plantree;
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CommandDest dest; /* the destination output of the execution */
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const char *portalName; /* name of portal, or NULL */
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TupleDesc tupDesc; /* set by ExecutorStart */
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} QueryDesc;
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/* in pquery.c */
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extern QueryDesc *CreateQueryDesc(Query *parsetree, Plan *plantree,
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CommandDest dest, const char *portalName);
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#endif /* EXECDESC_H */
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