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Final stage of psort reconstruction work: replace psort.c with

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a generalized module 'tuplesort.c' that can sort either HeapTuples or
IndexTuples, and is not tied to execution of a Sort node.  Clean up
memory leakages in sorting, and replace nbtsort.c's private implementation
of mergesorting with calls to tuplesort.c.
This commit is contained in:
Tom Lane
1999-10-17 22:15:09 +00:00
parent 59ed74e60b
commit 26c48b5e8c
10 changed files with 1763 additions and 1034 deletions
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20
src/include/nodes/execnodes.h
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@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: execnodes.h,v 1.36 1999/09/26 21:21:04 tgl Exp $
* $Id: execnodes.h,v 1.37 1999/10/17 22:15:07 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -597,17 +597,9 @@ typedef struct GroupState
/* ----------------
* SortState information
*
*| sort nodes are really just a kind of a scan since
*| we implement sorts by retrieving the entire subplan
*| into a temp relation, sorting the temp relation into
*| another sorted relation, and then preforming a simple
*| unqualified sequential scan on the sorted relation..
*| -cim 10/15/89
*
* Flag indicated whether relation has been sorted
* Keys scan key structures used to keep info on sort keys
* TempRelation temporary relation containing result of executing
* the subplan.
* sort_Done indicates whether sort has been performed yet
* sort_Keys scan key structures describing the sort keys
* tuplesortstate private state of tuplesort.c
*
* CommonScanState information
*
@ -628,9 +620,9 @@ typedef struct GroupState
typedef struct SortState
{
CommonScanState csstate; /* its first field is NodeTag */
bool sort_Flag;
bool sort_Done;
ScanKey sort_Keys;
bool cleaned;
void *tuplesortstate;
} SortState;
/* ----------------