Add operator strategy and comparison-value datatype fields to ScanKey.

Remove the 'strategy map' code, which was a large amount of mechanism
that no longer had any use except reverse-mapping from procedure OID to
strategy number.  Passing the strategy number to the index AM in the
first place is simpler and faster.
This is a preliminary step in planned support for cross-datatype index
operations.  I'm committing it now since the ScanKeyEntryInitialize()
API change touches quite a lot of files, and I want to commit those
changes before the tree drifts under me.

1 files changed, 9 insertions, 5 deletions

diff --git a/src/include/nodes/plannodes.h b/src/include/nodes/plannodes.h
index f56dc4653de..2312c0562e3 100644
--- a/src/include/nodes/plannodes.h
+++ b/src/include/nodes/plannodes.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: plannodes.h,v 1.68 2003/08/08 21:42:48 momjian Exp $
+ * $Id: plannodes.h,v 1.69 2003/11/09 21:30:37 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -153,15 +153,19 @@ typedef Scan SeqScan;
 
 /* ----------------
  *		index scan node
+ *
+ * Note: this can actually represent N indexscans, all on the same table
+ * but potentially using different indexes, put together with OR semantics.
  * ----------------
  */
 typedef struct IndexScan
 {
 	Scan		scan;
-	List	   *indxid;
-	List	   *indxqual;
-	List	   *indxqualorig;
-	ScanDirection indxorderdir;
+	List	   *indxid;			/* list of index OIDs (1 per scan) */
+	List	   *indxqual;		/* list of sublists of index quals */
+	List	   *indxqualorig;	/* the same in original form */
+	List	   *indxstrategy;	/* list of sublists of strategy numbers */
+	ScanDirection indxorderdir;	/* forward or backward or don't care */
 } IndexScan;
 
 /* ----------------