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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2013-11-13 13:26:33 -0500 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2013-11-13 13:26:40 -0500 |
| commit | a1c29c1fe153302c41c6c90815a5d73f2ceeb8a5 (patch) | |
| tree | ba95891ae1e9c3940904f3a6ea62771b3323cc7e /doc/src/sgml/ref/create_function.sgml | |
| parent | 2720c55c0986dd6368653579b93c369f7b477741 (diff) | |
Clarify CREATE FUNCTION documentation about handling of typmods.
The previous text was a bit misleading, as well as unnecessarily vague
about what information would be discarded. Per gripe from Craig Skinner.
Diffstat (limited to 'doc/src/sgml/ref/create_function.sgml')
| -rw-r--r-- | doc/src/sgml/ref/create_function.sgml | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/doc/src/sgml/ref/create_function.sgml b/doc/src/sgml/ref/create_function.sgml index a679a853a99..81278bb2f81 100644 --- a/doc/src/sgml/ref/create_function.sgml +++ b/doc/src/sgml/ref/create_function.sgml @@ -579,12 +579,13 @@ CREATE FUNCTION foo(int, int default 42) ... <para> The full <acronym>SQL</acronym> type syntax is allowed for - input arguments and return value. However, some details of the - type specification (e.g., the precision field for - type <type>numeric</type>) are the responsibility of the - underlying function implementation and are silently swallowed - (i.e., not recognized or - enforced) by the <command>CREATE FUNCTION</command> command. + declaring a function's arguments and return value. However, + parenthesized type modifiers (e.g., the precision field for + type <type>numeric</type>) are discarded by <command>CREATE FUNCTION</>. + Thus for example + <literal>CREATE FUNCTION foo (varchar(10)) ...</> + is exactly the same as + <literal>CREATE FUNCTION foo (varchar) ...</>. </para> <para> |