diff options
Diffstat (limited to 'src/backend/catalog/namespace.c')
| -rw-r--r-- | src/backend/catalog/namespace.c | 115 |
1 files changed, 1 insertions, 114 deletions
diff --git a/src/backend/catalog/namespace.c b/src/backend/catalog/namespace.c index 0f04bd0ba3c..fe61ee242ee 100644 --- a/src/backend/catalog/namespace.c +++ b/src/backend/catalog/namespace.c @@ -13,7 +13,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/catalog/namespace.c,v 1.80 2005/11/22 18:17:08 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/catalog/namespace.c,v 1.81 2006/02/10 19:01:12 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -912,119 +912,6 @@ OperatorIsVisible(Oid oprid) /* - * OpclassGetCandidates - * Given an index access method OID, retrieve a list of all the - * opclasses for that AM that are visible in the search path. - * - * NOTE: the opcname_tmp field in the returned structs should not be used - * by callers, because it points at syscache entries that we release at - * the end of this routine. If any callers needed the name information, - * we could pstrdup() the names ... but at present it'd be wasteful. - */ -OpclassCandidateList -OpclassGetCandidates(Oid amid) -{ - OpclassCandidateList resultList = NULL; - CatCList *catlist; - int i; - - /* Search syscache by AM OID only */ - catlist = SearchSysCacheList(CLAAMNAMENSP, 1, - ObjectIdGetDatum(amid), - 0, 0, 0); - - recomputeNamespacePath(); - - for (i = 0; i < catlist->n_members; i++) - { - HeapTuple opctup = &catlist->members[i]->tuple; - Form_pg_opclass opcform = (Form_pg_opclass) GETSTRUCT(opctup); - int pathpos = 0; - OpclassCandidateList newResult; - ListCell *nsp; - - /* Consider only opclasses that are in the search path */ - foreach(nsp, namespaceSearchPath) - { - if (opcform->opcnamespace == lfirst_oid(nsp)) - break; - pathpos++; - } - if (nsp == NULL) - continue; /* opclass is not in search path */ - - /* - * Okay, it's in the search path, but does it have the same name as - * something we already accepted? If so, keep only the one that - * appears earlier in the search path. - * - * If we have an ordered list from SearchSysCacheList (the normal - * case), then any conflicting opclass must immediately adjoin this - * one in the list, so we only need to look at the newest result item. - * If we have an unordered list, we have to scan the whole result - * list. - */ - if (resultList) - { - OpclassCandidateList prevResult; - - if (catlist->ordered) - { - if (strcmp(NameStr(opcform->opcname), - resultList->opcname_tmp) == 0) - prevResult = resultList; - else - prevResult = NULL; - } - else - { - for (prevResult = resultList; - prevResult; - prevResult = prevResult->next) - { - if (strcmp(NameStr(opcform->opcname), - prevResult->opcname_tmp) == 0) - break; - } - } - if (prevResult) - { - /* We have a match with a previous result */ - Assert(pathpos != prevResult->pathpos); - if (pathpos > prevResult->pathpos) - continue; /* keep previous result */ - /* replace previous result */ - prevResult->opcname_tmp = NameStr(opcform->opcname); - prevResult->pathpos = pathpos; - prevResult->oid = HeapTupleGetOid(opctup); - prevResult->opcintype = opcform->opcintype; - prevResult->opcdefault = opcform->opcdefault; - prevResult->opckeytype = opcform->opckeytype; - continue; - } - } - - /* - * Okay to add it to result list - */ - newResult = (OpclassCandidateList) - palloc(sizeof(struct _OpclassCandidateList)); - newResult->opcname_tmp = NameStr(opcform->opcname); - newResult->pathpos = pathpos; - newResult->oid = HeapTupleGetOid(opctup); - newResult->opcintype = opcform->opcintype; - newResult->opcdefault = opcform->opcdefault; - newResult->opckeytype = opcform->opckeytype; - newResult->next = resultList; - resultList = newResult; - } - - ReleaseSysCacheList(catlist); - - return resultList; -} - -/* * OpclassnameGetOpcid * Try to resolve an unqualified index opclass name. * Returns OID if opclass found in search path, else InvalidOid. |