diff options
Diffstat (limited to 'src/backend/access/gist/gistscan.c')
| -rw-r--r-- | src/backend/access/gist/gistscan.c | 56 |
1 files changed, 24 insertions, 32 deletions
diff --git a/src/backend/access/gist/gistscan.c b/src/backend/access/gist/gistscan.c index 9c1c92a880a..8a23b9b115c 100644 --- a/src/backend/access/gist/gistscan.c +++ b/src/backend/access/gist/gistscan.c @@ -8,7 +8,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/access/gist/gistscan.c,v 1.43 2002/06/20 20:29:24 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/access/gist/gistscan.c,v 1.44 2003/03/23 23:01:02 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -78,28 +78,14 @@ gistrescan(PG_FUNCTION_ARGS) ItemPointerSetInvalid(&s->currentItemData); ItemPointerSetInvalid(&s->currentMarkData); - if (s->numberOfKeys > 0) - { - memmove(s->keyData, - key, - s->numberOfKeys * sizeof(ScanKeyData)); - } - p = (GISTScanOpaque) s->opaque; if (p != (GISTScanOpaque) NULL) { + /* rescan an existing indexscan --- reset state */ gistfreestack(p->s_stack); gistfreestack(p->s_markstk); p->s_stack = p->s_markstk = (GISTSTACK *) NULL; p->s_flags = 0x0; - for (i = 0; i < s->numberOfKeys; i++) - { - s->keyData[i].sk_procedure - = RelationGetGISTStrategy(s->indexRelation, - s->keyData[i].sk_attno, - s->keyData[i].sk_procedure); - s->keyData[i].sk_func = p->giststate->consistentFn[s->keyData[i].sk_attno - 1]; - } } else { @@ -110,22 +96,28 @@ gistrescan(PG_FUNCTION_ARGS) s->opaque = p; p->giststate = (GISTSTATE *) palloc(sizeof(GISTSTATE)); initGISTstate(p->giststate, s->indexRelation); - if (s->numberOfKeys > 0) - - /* - * * Play games here with the scan key to use the Consistent * - * function for all comparisons: * 1) the sk_procedure field - * will now be used to hold the * strategy number * 2) the - * sk_func field will point to the Consistent function - */ - for (i = 0; i < s->numberOfKeys; i++) - { - s->keyData[i].sk_procedure = - RelationGetGISTStrategy(s->indexRelation, - s->keyData[i].sk_attno, - s->keyData[i].sk_procedure); - s->keyData[i].sk_func = p->giststate->consistentFn[s->keyData[i].sk_attno - 1]; - } + } + + /* Update scan key, if a new one is given */ + if (key && s->numberOfKeys > 0) + { + memmove(s->keyData, + key, + s->numberOfKeys * sizeof(ScanKeyData)); + /* + * Play games here with the scan key to use the Consistent + * function for all comparisons: 1) the sk_procedure field + * will now be used to hold the strategy number 2) the + * sk_func field will point to the Consistent function + */ + for (i = 0; i < s->numberOfKeys; i++) + { + s->keyData[i].sk_procedure = + RelationGetGISTStrategy(s->indexRelation, + s->keyData[i].sk_attno, + s->keyData[i].sk_procedure); + s->keyData[i].sk_func = p->giststate->consistentFn[s->keyData[i].sk_attno - 1]; + } } PG_RETURN_VOID(); |