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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2002-04-11 20:00:18 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2002-04-11 20:00:18 +0000 |
| commit | 902a6a0a4bc62d619a5ccd1ef0ff7fb3a5d897f1 (patch) | |
| tree | c5cc85818d8a3ffae03a23bacd3e679945a41dbd /doc/src/sgml/ref/create_aggregate.sgml | |
| parent | 3f6299df6c7d905bdef44eb3a4b19f248ebc14dc (diff) | |
| download | postgresql-902a6a0a4bc62d619a5ccd1ef0ff7fb3a5d897f1.tar.gz | |
Restructure representation of aggregate functions so that they have pg_proc
entries, per pghackers discussion. This fixes aggregates to live in
namespaces, and also simplifies/speeds up lookup in parse_func.c.
Also, add a 'proimplicit' flag to pg_proc that controls whether a type
coercion function may be invoked implicitly, or only explicitly. The
current settings of these flags are more permissive than I would like,
but we will need to debate and refine the behavior; for now, I avoided
breaking regression tests as much as I could.
Diffstat (limited to 'doc/src/sgml/ref/create_aggregate.sgml')
| -rw-r--r-- | doc/src/sgml/ref/create_aggregate.sgml | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/doc/src/sgml/ref/create_aggregate.sgml b/doc/src/sgml/ref/create_aggregate.sgml index 8c5e3f7f48..6a421c2a5f 100644 --- a/doc/src/sgml/ref/create_aggregate.sgml +++ b/doc/src/sgml/ref/create_aggregate.sgml @@ -1,5 +1,5 @@ <!-- -$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_aggregate.sgml,v 1.16 2001/12/08 03:24:34 thomas Exp $ +$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_aggregate.sgml,v 1.17 2002/04/11 19:59:55 tgl Exp $ PostgreSQL documentation --> @@ -168,8 +168,9 @@ CREATE <para> An aggregate function is identified by its name and input data type. Two aggregates can have the same name if they operate on different - input types. To avoid confusion, do not make an ordinary function - of the same name and input data type as an aggregate. + input types. The + name and input data type of an aggregate must also be distinct from + the name and input data type of every ordinary function. </para> <para> An aggregate function is made from one or two ordinary |