This patch refactors away some duplicated code in the index AM build

methods: they all invoke UpdateStats() since they have computed the
number of heap tuples, so I created a function in catalog/index.c that
each AM now calls.

Author: Neil Conway

src/backend/access/gist/gist.c

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/gist/gist.c,v 1.113 2005/03/21 01:23:56 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/gist/gist.c,v 1.114 2005/05/11 06:24:50 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -184,27 +184,8 @@ gistbuild(PG_FUNCTION_ARGS)
 
 	/* okay, all heap tuples are indexed */
 
-	/*
-	 * Since we just counted the tuples in the heap, we update its stats
-	 * in pg_class to guarantee that the planner takes advantage of the
-	 * index we just created.  But, only update statistics during normal
-	 * index definitions, not for indices on system catalogs created
-	 * during bootstrap processing.  We must close the relations before
-	 * updating statistics to guarantee that the relcache entries are
-	 * flushed when we increment the command counter in UpdateStats(). But
-	 * we do not release any locks on the relations; those will be held
-	 * until end of transaction.
-	 */
-	if (IsNormalProcessingMode())
-	{
-		Oid			hrelid = RelationGetRelid(heap);
-		Oid			irelid = RelationGetRelid(index);
-
-		heap_close(heap, NoLock);
-		index_close(index);
-		UpdateStats(hrelid, reltuples);
-		UpdateStats(irelid, buildstate.indtuples);
-	}
+	/* since we just counted the # of tuples, may as well update stats */
+	IndexCloseAndUpdateStats(heap, reltuples, index, buildstate.indtuples);
 
 	freeGISTstate(&buildstate.giststate);
 #ifdef GISTDEBUG

src/backend/access/hash/hash.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/hash/hash.c,v 1.78 2005/03/27 23:52:57 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/hash/hash.c,v 1.79 2005/05/11 06:24:51 neilc Exp $
  *
  * NOTES
  *	  This file contains only the public interface routines.
@@ -72,27 +72,8 @@ hashbuild(PG_FUNCTION_ARGS)
 	reltuples = IndexBuildHeapScan(heap, index, indexInfo,
 								hashbuildCallback, (void *) &buildstate);
 
-	/*
-	 * Since we just counted the tuples in the heap, we update its stats
-	 * in pg_class to guarantee that the planner takes advantage of the
-	 * index we just created.  But, only update statistics during normal
-	 * index definitions, not for indices on system catalogs created
-	 * during bootstrap processing.  We must close the relations before
-	 * updating statistics to guarantee that the relcache entries are
-	 * flushed when we increment the command counter in UpdateStats(). But
-	 * we do not release any locks on the relations; those will be held
-	 * until end of transaction.
-	 */
-	if (IsNormalProcessingMode())
-	{
-		Oid			hrelid = RelationGetRelid(heap);
-		Oid			irelid = RelationGetRelid(index);
-
-		heap_close(heap, NoLock);
-		index_close(index);
-		UpdateStats(hrelid, reltuples);
-		UpdateStats(irelid, buildstate.indtuples);
-	}
+	/* since we just counted the # of tuples, may as well update stats */
+	IndexCloseAndUpdateStats(heap, reltuples, index, buildstate.indtuples);
 
 	PG_RETURN_VOID();
 }

src/backend/access/nbtree/nbtree.c

@@ -12,7 +12,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/nbtree/nbtree.c,v 1.129 2005/05/07 21:32:23 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/nbtree/nbtree.c,v 1.130 2005/05/11 06:24:53 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -148,27 +148,8 @@ btbuild(PG_FUNCTION_ARGS)
 	}
 #endif   /* BTREE_BUILD_STATS */
 
-	/*
-	 * Since we just counted the tuples in the heap, we update its stats
-	 * in pg_class to guarantee that the planner takes advantage of the
-	 * index we just created.  But, only update statistics during normal
-	 * index definitions, not for indices on system catalogs created
-	 * during bootstrap processing.  We must close the relations before
-	 * updating statistics to guarantee that the relcache entries are
-	 * flushed when we increment the command counter in UpdateStats(). But
-	 * we do not release any locks on the relations; those will be held
-	 * until end of transaction.
-	 */
-	if (IsNormalProcessingMode())
-	{
-		Oid			hrelid = RelationGetRelid(heap);
-		Oid			irelid = RelationGetRelid(index);
-
-		heap_close(heap, NoLock);
-		index_close(index);
-		UpdateStats(hrelid, reltuples);
-		UpdateStats(irelid, buildstate.indtuples);
-	}
+	/* since we just counted the # of tuples, may as well update stats */
+	IndexCloseAndUpdateStats(heap, reltuples, index, buildstate.indtuples);
 
 	PG_RETURN_VOID();
 }

src/backend/access/rtree/rtree.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/access/rtree/rtree.c,v 1.88 2005/03/21 01:24:00 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/access/rtree/rtree.c,v 1.89 2005/05/11 06:24:54 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -142,27 +142,8 @@ rtbuild(PG_FUNCTION_ARGS)
 
 	/* okay, all heap tuples are indexed */
 
-	/*
-	 * Since we just counted the tuples in the heap, we update its stats
-	 * in pg_class to guarantee that the planner takes advantage of the
-	 * index we just created.  But, only update statistics during normal
-	 * index definitions, not for indices on system catalogs created
-	 * during bootstrap processing.  We must close the relations before
-	 * updating statistics to guarantee that the relcache entries are
-	 * flushed when we increment the command counter in UpdateStats(). But
-	 * we do not release any locks on the relations; those will be held
-	 * until end of transaction.
-	 */
-	if (IsNormalProcessingMode())
-	{
-		Oid			hrelid = RelationGetRelid(heap);
-		Oid			irelid = RelationGetRelid(index);
-
-		heap_close(heap, NoLock);
-		index_close(index);
-		UpdateStats(hrelid, reltuples);
-		UpdateStats(irelid, buildstate.indtuples);
-	}
+	/* since we just counted the # of tuples, may as well update stats */
+	IndexCloseAndUpdateStats(heap, reltuples, index, buildstate.indtuples);
 
 	PG_RETURN_VOID();
 }

src/backend/catalog/index.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/catalog/index.c,v 1.254 2005/05/06 17:24:52 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/catalog/index.c,v 1.255 2005/05/11 06:24:54 neilc Exp $
  *
  *
  * INTERFACE ROUTINES
@@ -62,6 +62,7 @@ static void UpdateIndexRelation(Oid indexoid, Oid heapoid,
 					Oid *classOids,
 					bool primary);
 static Oid	IndexGetRelation(Oid indexId);
+static void UpdateStats(Oid relid, double reltuples);
 
 
 /*
@@ -1149,6 +1150,36 @@ setNewRelfilenode(Relation relation)
 }
 
 
+/*
+ * This is invoked by the various index AMs once they have finished
+ * constructing an index. Constructing an index involves counting the
+ * number of tuples in both the relation and the index, so we take
+ * advantage of the opportunity to update pg_class to ensure that the
+ * planner takes advantage of the index we just created.  But, only
+ * update statistics during normal index definitions, not for indices
+ * on system catalogs created during bootstrap processing.  We must
+ * close the relations before updating statistics to guarantee that
+ * the relcache entries are flushed when we increment the command
+ * counter in UpdateStats(). But we do not release any locks on the
+ * relations; those will be held until end of transaction.
+ */
+void
+IndexCloseAndUpdateStats(Relation heap, double heapTuples,
+						 Relation index, double indexTuples)
+{
+	Oid		hrelid = RelationGetRelid(heap);
+	Oid		irelid = RelationGetRelid(index);
+
+	if (!IsNormalProcessingMode())
+		return;
+
+	heap_close(heap, NoLock);
+	index_close(index);
+	UpdateStats(hrelid, heapTuples);
+	UpdateStats(irelid, indexTuples);
+}
+
+
 /* ----------------
  *		UpdateStats
  *
@@ -1157,7 +1188,7 @@ setNewRelfilenode(Relation relation)
  * in the context of VACUUM, only CREATE INDEX.
  * ----------------
  */
-void
+static void
 UpdateStats(Oid relid, double reltuples)
 {
 	Relation	whichRel;

src/include/catalog/index.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/catalog/index.h,v 1.62 2005/04/14 01:38:20 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/index.h,v 1.63 2005/05/11 06:24:55 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -52,7 +52,8 @@ extern void FormIndexDatum(IndexInfo *indexInfo,
 			   Datum *values,
 			   bool *isnull);
 
-extern void UpdateStats(Oid relid, double reltuples);
+extern void IndexCloseAndUpdateStats(Relation heap, double heapTuples,
+									 Relation index, double indexTuples);
 
 extern void setRelhasindex(Oid relid, bool hasindex,
 			   bool isprimary, Oid reltoastidxid);