diff options
Diffstat (limited to 'src/backend/optimizer/util/plancat.c')
| -rw-r--r-- | src/backend/optimizer/util/plancat.c | 56 |
1 files changed, 39 insertions, 17 deletions
diff --git a/src/backend/optimizer/util/plancat.c b/src/backend/optimizer/util/plancat.c index 353f2debe4c..9150f1d936f 100644 --- a/src/backend/optimizer/util/plancat.c +++ b/src/backend/optimizer/util/plancat.c @@ -9,7 +9,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.130 2007/01/05 22:19:33 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.131 2007/01/09 02:14:13 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -142,7 +142,6 @@ get_relation_info(PlannerInfo *root, Oid relationObjectId, bool inhparent, IndexOptInfo *info; int ncolumns; int i; - int16 amorderstrategy; /* * Extract info from the relation descriptor for the index. @@ -169,12 +168,15 @@ get_relation_info(PlannerInfo *root, Oid relationObjectId, bool inhparent, info->ncolumns = ncolumns = index->indnatts; /* - * Need to make opfamily and ordering arrays large enough to put - * a terminating 0 at the end of each one. + * Need to make opfamily array large enough to put a terminating + * zero at the end. */ info->indexkeys = (int *) palloc(sizeof(int) * ncolumns); info->opfamily = (Oid *) palloc0(sizeof(Oid) * (ncolumns + 1)); - info->ordering = (Oid *) palloc0(sizeof(Oid) * (ncolumns + 1)); + /* initialize these to zeroes in case index is unordered */ + info->fwdsortop = (Oid *) palloc0(sizeof(Oid) * ncolumns); + info->revsortop = (Oid *) palloc0(sizeof(Oid) * ncolumns); + info->nulls_first = (bool *) palloc0(sizeof(bool) * ncolumns); for (i = 0; i < ncolumns; i++) { @@ -189,22 +191,42 @@ get_relation_info(PlannerInfo *root, Oid relationObjectId, bool inhparent, /* * Fetch the ordering operators associated with the index, if any. */ - amorderstrategy = indexRelation->rd_am->amorderstrategy; - if (amorderstrategy > 0) + if (indexRelation->rd_am->amorderstrategy > 0) { - int oprindex = amorderstrategy - 1; - - /* - * Index AM must have a fixed set of strategies for it to - * make sense to specify amorderstrategy, so we need not - * allow the case amstrategies == 0. - */ - Assert(oprindex < indexRelation->rd_am->amstrategies); + int nstrat = indexRelation->rd_am->amstrategies; for (i = 0; i < ncolumns; i++) { - info->ordering[i] = indexRelation->rd_operator[oprindex]; - oprindex += indexRelation->rd_am->amstrategies; + int16 opt = indexRelation->rd_indoption[i]; + int fwdstrat; + int revstrat; + + if (opt & INDOPTION_DESC) + { + fwdstrat = indexRelation->rd_am->amdescorder; + revstrat = indexRelation->rd_am->amorderstrategy; + } + else + { + fwdstrat = indexRelation->rd_am->amorderstrategy; + revstrat = indexRelation->rd_am->amdescorder; + } + /* + * Index AM must have a fixed set of strategies for it + * to make sense to specify amorderstrategy, so we + * need not allow the case amstrategies == 0. + */ + if (fwdstrat > 0) + { + Assert(fwdstrat <= nstrat); + info->fwdsortop[i] = indexRelation->rd_operator[i * nstrat + fwdstrat - 1]; + } + if (revstrat > 0) + { + Assert(revstrat <= nstrat); + info->revsortop[i] = indexRelation->rd_operator[i * nstrat + revstrat - 1]; + } + info->nulls_first[i] = (opt & INDOPTION_NULLS_FIRST) != 0; } } |