Postgres95 1.01 Distribution - Virgin Sources

src/backend/optimizer/prep/archive.c

@@ -0,0 +1,66 @@
+/*-------------------------------------------------------------------------
+ *
+ * archive.c--
+ *    Support for planning scans on archived relations
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ *    $Header: /cvsroot/pgsql/src/backend/optimizer/prep/Attic/archive.c,v 1.1.1.1 1996/07/09 06:21:38 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#include <stdio.h>		/* for sprintf() */
+#include <sys/types.h>		/* for u_int in relcache.h */
+#include "postgres.h"
+
+#include "utils/rel.h"
+#include "utils/elog.h"
+#include "utils/palloc.h"
+#include "utils/relcache.h"
+#include "catalog/pg_class.h"
+#include "nodes/pg_list.h"
+#include "nodes/parsenodes.h"
+#include "optimizer/prep.h"
+#include "commands/creatinh.h"
+
+void
+plan_archive(List *rt)
+{
+    List *rtitem;
+    RangeTblEntry *rte;
+    TimeRange *trange;
+    Relation r;
+    Oid reloid;
+
+    foreach(rtitem, rt) {
+	rte = lfirst(rtitem);
+	trange = rte->timeRange;
+	if (trange) {
+	    reloid = rte->relid;
+	    r = RelationIdGetRelation(reloid);
+	    if (r->rd_rel->relarch != 'n') {
+		rte->archive = true;
+	    }
+	}
+    }
+}
+
+
+/*
+ *  find_archive_rels -- Given a particular relid, find the archive
+ *			 relation's relid.
+ */
+List *
+find_archive_rels(Oid relid)
+{
+    Relation arel;
+    char *arelName;
+
+    arelName = MakeArchiveName(relid);
+    arel = RelationNameGetRelation(arelName);
+    pfree(arelName);
+
+    return lconsi(arel->rd_id, lconsi(relid, NIL));
+}