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/*-------------------------------------------------------------------------
*
* indexnode.c--
* Routines to find all indices on a relation
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/util/Attic/indexnode.c,v 1.2 1996/10/31 10:59:37 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#include <sys/types.h>
#include "postgres.h"
#include "nodes/plannodes.h"
#include "nodes/parsenodes.h"
#include "nodes/relation.h"
#include "optimizer/internal.h"
#include "optimizer/plancat.h"
#include "optimizer/pathnode.h" /* where the decls go */
static List *find_secondary_index(Query *root, Oid relid);
/*
* find-relation-indices--
* Returns a list of index nodes containing appropriate information for
* each (secondary) index defined on a relation.
*
*/
List *
find_relation_indices(Query *root, Rel *rel)
{
if (rel->indexed) {
return (find_secondary_index(root, lfirsti(rel->relids)));
} else {
return (NIL);
}
}
/*
* find-secondary-index--
* Creates a list of index path nodes containing information for each
* secondary index defined on a relation by searching through the index
* catalog.
*
* 'relid' is the OID of the relation for which indices are being located
*
* Returns a list of new index nodes.
*
*/
static List *
find_secondary_index(Query *root, Oid relid)
{
IdxInfoRetval indexinfo;
List *indexes = NIL;
bool first = TRUE;
while (index_info(root, first, relid,&indexinfo)) {
Rel *indexnode = makeNode(Rel);
indexnode->relids = lconsi(indexinfo.relid,NIL);
indexnode->relam = indexinfo.relam;
indexnode->pages = indexinfo.pages;
indexnode->tuples = indexinfo.tuples;
indexnode->indexkeys = indexinfo.indexkeys;
indexnode->ordering = indexinfo.orderOprs;
indexnode->classlist = indexinfo.classlist;
indexnode->indproc= indexinfo.indproc;
indexnode->indpred = (List*)indexinfo.indpred;
indexnode->indexed= false; /* not indexed itself */
indexnode->size = 0;
indexnode->width= 0;
indexnode->targetlist= NIL;
indexnode->pathlist= NIL;
indexnode->unorderedpath= NULL;
indexnode->cheapestpath= NULL;
indexnode->pruneable= true;
indexnode->clauseinfo= NIL;
indexnode->joininfo= NIL;
indexnode->innerjoin= NIL;
indexes = lcons(indexnode, indexes);
first = FALSE;
}
return indexes;
}
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