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Replace ALTER TABLE ... SET STATISTICS DISTINCT with a more general mechanism.

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Attributes can now have options, just as relations and tablespaces do, and
the reloptions code is used to parse, validate, and store them.  For
simplicity and because these options are not performance critical, we store
them in a separate cache rather than the main relcache.

Thanks to Alex Hunsaker for the review.
This commit is contained in:
Robert Haas
2010-01-22 16:40:19 +00:00
parent 9ca0989037
commit 76a47c0e74
19 changed files with 267 additions and 223 deletions
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6
src/include/access/reloptions.h
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@@ -12,7 +12,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/reloptions.h,v 1.18 2010/01/05 21:53:59 rhaas Exp $
* $PostgreSQL: pgsql/src/include/access/reloptions.h,v 1.19 2010/01/22 16:40:19 rhaas Exp $
*
*-------------------------------------------------------------------------
*/
@@ -40,7 +40,8 @@ typedef enum relopt_kind
RELOPT_KIND_HASH = (1 << 3),
RELOPT_KIND_GIN = (1 << 4),
RELOPT_KIND_GIST = (1 << 5),
RELOPT_KIND_TABLESPACE = (1 << 6),
RELOPT_KIND_ATTRIBUTE = (1 << 6),
RELOPT_KIND_TABLESPACE = (1 << 7),
/* if you add a new kind, make sure you update "last_default" too */
RELOPT_KIND_LAST_DEFAULT = RELOPT_KIND_TABLESPACE,
/* some compilers treat enums as signed ints, so we can't use 1 << 31 */
@@ -266,6 +267,7 @@ extern bytea *default_reloptions(Datum reloptions, bool validate,
extern bytea *heap_reloptions(char relkind, Datum reloptions, bool validate);
extern bytea *index_reloptions(RegProcedure amoptions, Datum reloptions,
bool validate);
extern bytea *attribute_reloptions(Datum reloptions, bool validate);
extern bytea *tablespace_reloptions(Datum reloptions, bool validate);
#endif /* RELOPTIONS_H */