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Implement the width_bucket() function, per SQL2003. This commit only adds

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a variant of the function for the 'numeric' datatype; it would be possible
to add additional variants for other datatypes, but I haven't done so yet.

This commit includes regression tests and minimal documentation; if we
want developers to actually use this function in applications, we'll
probably need to document what it does more fully.
This commit is contained in:
Neil Conway
2004-05-14 21:42:30 +00:00
parent 19a495caaa
commit 0079547bcb
10 changed files with 272 additions and 23 deletions
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3
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 1.237 2004/05/05 04:48:47 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.238 2004/05/14 21:42:30 neilc Exp $
*
*-------------------------------------------------------------------------
*/
@@ -758,6 +758,7 @@ extern Datum int8_sum(PG_FUNCTION_ARGS);
extern Datum int2_avg_accum(PG_FUNCTION_ARGS);
extern Datum int4_avg_accum(PG_FUNCTION_ARGS);
extern Datum int8_avg(PG_FUNCTION_ARGS);
extern Datum width_bucket_numeric(PG_FUNCTION_ARGS);
/* ri_triggers.c */
extern Datum RI_FKey_check_ins(PG_FUNCTION_ARGS);