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The added aggregates are:

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(1) boolean-and and boolean-or aggregates named bool_and and bool_or.
    they (SHOULD;-) correspond to standard sql every and some/any aggregates.
    they do not have the right name as there is a problem with
    the standard and the parser for some/any. Tom also think that
    the standard name is misleading because NULL are ignored.
    Also add 'every' aggregate.

(2) bitwise integer aggregates named bit_and and bit_or for
    int2, int4, int8 and bit types. They are not standard, but I find
    them useful. I needed them once.


The patches adds:

- 2 new very short strict functions for boolean aggregates in
  src/backed/utils/adt/bool.c,
  src/include/utils/builtins.h and src/include/catalog/pg_proc.h

- the new aggregates declared in src/include/catalog/pg_proc.h and
  src/include/catalog/pg_aggregate.h

- some documentation and validation about these new aggregates.

Fabien COELHO
This commit is contained in:
Bruce Momjian
2004-05-26 15:26:28 +00:00
parent 3dc37cd8d6
commit 8096fe45ce
8 changed files with 444 additions and 7 deletions
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4
src/include/utils/builtins.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.238 2004/05/14 21:42:30 neilc Exp $
* $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.239 2004/05/26 15:26:18 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -68,6 +68,8 @@ extern Datum istrue(PG_FUNCTION_ARGS);
extern Datum isfalse(PG_FUNCTION_ARGS);
extern Datum isnottrue(PG_FUNCTION_ARGS);
extern Datum isnotfalse(PG_FUNCTION_ARGS);
extern Datum booland_statefunc(PG_FUNCTION_ARGS);
extern Datum boolor_statefunc(PG_FUNCTION_ARGS);
/* char.c */
extern Datum charin(PG_FUNCTION_ARGS);