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Change the notation for calling functions with named parameters from

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"val AS name" to "name := val", as per recent discussion.

This patch catches everything in the original named-parameters patch,
but I'm not certain that no other dependencies snuck in later (grepping
the source tree for all uses of AS soon proved unworkable).

In passing I note that we've dropped the ball at least once on keeping
ecpg's lexer (as opposed to parser) in sync with the backend.  It would
be a good idea to go through all of pgc.l and see if it's in sync now.
I didn't attempt that at the moment.
This commit is contained in:
Tom Lane
2010-05-30 18:10:41 +00:00
parent 2bde07c198
commit b12b7a9038
11 changed files with 105 additions and 102 deletions
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15
doc/src/sgml/syntax.sgml
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@@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/syntax.sgml,v 1.144 2010/05/27 18:23:47 petere Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/syntax.sgml,v 1.145 2010/05/30 18:10:40 tgl Exp $ -->
<chapter id="sql-syntax">
<title>SQL Syntax</title>
@@ -2285,10 +2285,11 @@ SELECT concat_lower_or_upper('Hello', 'World');
</indexterm>
<para>
In named notation, each argument's name is specified using the
<literal>AS</literal> keyword. For example:
In named notation, each argument's name is specified using
<literal>:=</literal> to separate it from the argument expression.
For example:
<screen>
SELECT concat_lower_or_upper('Hello' AS a, 'World' AS b);
SELECT concat_lower_or_upper(a := 'Hello', b := 'World');
concat_lower_or_upper
-----------------------
hello world
@@ -2299,13 +2300,13 @@ SELECT concat_lower_or_upper('Hello' AS a, 'World' AS b);
using named notation is that the arguments may be specified in any
order, for example:
<screen>
SELECT concat_lower_or_upper('Hello' AS a, 'World' AS b, true AS uppercase);
SELECT concat_lower_or_upper(a := 'Hello', b := 'World', uppercase := true);
concat_lower_or_upper
-----------------------
HELLO WORLD
(1 row)
SELECT concat_lower_or_upper('Hello' AS a, true AS uppercase, 'World' AS b);
SELECT concat_lower_or_upper(a := 'Hello', uppercase := true, b := 'World');
concat_lower_or_upper
-----------------------
HELLO WORLD
@@ -2327,7 +2328,7 @@ SELECT concat_lower_or_upper('Hello' AS a, true AS uppercase, 'World' AS b);
already mentioned, named arguments cannot precede positional arguments.
For example:
<screen>
SELECT concat_lower_or_upper('Hello', 'World', true AS uppercase);
SELECT concat_lower_or_upper('Hello', 'World', uppercase := true);
concat_lower_or_upper
-----------------------
HELLO WORLD