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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2009-12-15 17:57:48 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2009-12-15 17:57:48 +0000 |
| commit | 34d26872ed816b299eef2fa4240d55316697f42d (patch) | |
| tree | d7373e29b365c151702c44325f0f5cc9dcc3e17c /src/include/parser/parse_func.h | |
| parent | 6a6efb964092902bf53965649c3ed78b1868b37e (diff) | |
| download | postgresql-34d26872ed816b299eef2fa4240d55316697f42d.tar.gz | |
Support ORDER BY within aggregate function calls, at long last providing a
non-kluge method for controlling the order in which values are fed to an
aggregate function. At the same time eliminate the old implementation
restriction that DISTINCT was only supported for single-argument aggregates.
Possibly release-notable behavioral change: formerly, agg(DISTINCT x)
dropped null values of x unconditionally. Now, it does so only if the
agg transition function is strict; otherwise nulls are treated as DISTINCT
normally would, ie, you get one copy.
Andrew Gierth, reviewed by Hitoshi Harada
Diffstat (limited to 'src/include/parser/parse_func.h')
| -rw-r--r-- | src/include/parser/parse_func.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/include/parser/parse_func.h b/src/include/parser/parse_func.h index 0a38f740b1..8521f25cea 100644 --- a/src/include/parser/parse_func.h +++ b/src/include/parser/parse_func.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/parser/parse_func.h,v 1.66 2009/10/08 02:39:25 tgl Exp $ + * $PostgreSQL: pgsql/src/include/parser/parse_func.h,v 1.67 2009/12/15 17:57:47 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -44,7 +44,8 @@ typedef enum extern Node *ParseFuncOrColumn(ParseState *pstate, List *funcname, List *fargs, - bool agg_star, bool agg_distinct, bool func_variadic, + List *agg_order, bool agg_star, bool agg_distinct, + bool func_variadic, WindowDef *over, bool is_column, int location); extern FuncDetailCode func_get_detail(List *funcname, |