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Some minor code cleanup, falling out from the removal of rtree. SK_NEGATE

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isn't being used anywhere anymore, and there seems no point in a generic
index_keytest() routine when two out of three remaining access methods
aren't using it.  Also, add a comment documenting a convention for
letting access methods define private flag bits in ScanKey sk_flags.
There are no such flags at the moment but I'm thinking about changing
btree's handling of "required keys" to use flag bits in the keys
rather than a count of required key positions.  Also, if some AM did
still want SK_NEGATE then it would be reasonable to treat it as a private
flag bit.
This commit is contained in:
Tom Lane
2006-01-14 22:03:35 +00:00
parent 7930e627d8
commit f7ea931287
7 changed files with 57 additions and 131 deletions
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11
src/include/access/skey.h
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@ -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/access/skey.h,v 1.29 2005/06/24 00:18:52 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/skey.h,v 1.30 2006/01/14 22:03:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -69,10 +69,15 @@ typedef struct ScanKeyData
typedef ScanKeyData *ScanKey;
/* ScanKeyData sk_flags */
/*
* ScanKeyData sk_flags
*
* sk_flags bits 0-15 are reserved for system-wide use (symbols for those
* bits should be defined here). Bits 16-31 are reserved for use within
* individual index access methods.
*/
#define SK_ISNULL 0x0001 /* sk_argument is NULL */
#define SK_UNARY 0x0002 /* unary operator (currently unsupported) */
#define SK_NEGATE 0x0004 /* must negate the function result */
/*