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SQL2003-standard statistical aggregates, by Sergey Koposov. I've added only

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the float8 versions of the aggregates, which is all that the standard requires.
Sergey's original patch also provided versions using numeric arithmetic,
but given the size and slowness of the code, I doubt we ought to include
those in core.
This commit is contained in:
Tom Lane
2006-07-28 18:33:04 +00:00
parent 0fd087af83
commit 1249cf8f38
12 changed files with 880 additions and 103 deletions
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24
src/backend/utils/adt/int8.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/int8.c,v 1.60 2006/03/05 15:58:42 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/int8.c,v 1.61 2006/07/28 18:33:04 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -694,6 +694,28 @@ int8inc(PG_FUNCTION_ARGS)
}
}
/*
* These functions are exactly like int8inc but are used for aggregates that
* count only non-null values. Since the functions are declared strict,
* the null checks happen before we ever get here, and all we need do is
* increment the state value. We could actually make these pg_proc entries
* point right at int8inc, but then the opr_sanity regression test would
* complain about mismatched entries for a built-in function.
*/
Datum
int8inc_any(PG_FUNCTION_ARGS)
{
return int8inc(fcinfo);
}
Datum
int8inc_float8_float8(PG_FUNCTION_ARGS)
{
return int8inc(fcinfo);
}
Datum
int8larger(PG_FUNCTION_ARGS)
{