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Implement a psql command "\ef" to edit the definition of a function.

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In support of that, create a backend function pg_get_functiondef().
The psql command is functional but maybe a bit rough around the edges...

Abhijit Menon-Sen
This commit is contained in:
Tom Lane
2008-09-06 00:01:25 +00:00
parent 2cdcf459ba
commit 2c863ca818
7 changed files with 407 additions and 59 deletions
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13
doc/src/sgml/func.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.443 2008/07/21 04:47:00 tgl Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.444 2008/09/06 00:01:21 tgl Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@ -11562,6 +11562,10 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
<primary>pg_get_ruledef</primary>
</indexterm>
<indexterm>
<primary>pg_get_functiondef</primary>
</indexterm>
<indexterm>
<primary>pg_get_function_arguments</primary>
</indexterm>
@ -11643,6 +11647,11 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
<entry>decompile internal form of an expression, assuming that any Vars
in it refer to the relation indicated by the second parameter</entry>
</row>
<row>
<entry><literal><function>pg_get_functiondef</function>(<parameter>func_oid</parameter>)</literal></entry>
<entry><type>text</type></entry>
<entry>get definition of a function</entry>
</row>
<row>
<entry><literal><function>pg_get_function_arguments</function>(<parameter>func_oid</parameter>)</literal></entry>
<entry><type>text</type></entry>
@ -11756,6 +11765,8 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
</para>
<para>
<function>pg_get_functiondef</> returns a complete
<command>CREATE OR REPLACE FUNCTION</> statement for a function.
<function>pg_get_function_arguments</function> returns the argument list
of a function, in the form it would need to appear in within
<command>CREATE FUNCTION</>.

25
doc/src/sgml/ref/psql-ref.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.209 2008/07/03 03:37:16 tgl Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.210 2008/09/06 00:01:21 tgl Exp $
PostgreSQL documentation
-->
@ -1195,6 +1195,29 @@ testdb=&gt;
</varlistentry>
<varlistentry>
<term><literal>\ef <replaceable class="parameter">function_description</replaceable> </literal></term>
<listitem>
<para>
This command fetches and edits the definition of the named function,
in the form of a <command>CREATE OR REPLACE FUNCTION</> command.
Editing is done in the same way as for <literal>\e</>.
After the editor exits, the updated command waits in the query buffer;
type semicolon or <literal>\g</> to send it, or <literal>\r</>
to cancel.
</para>
<para>
The target function can be specified by name alone, or by name
and arguments, for example <literal>foo(integer, text)</>.
The argument types must be given if there is more
than one function of the same name.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>\echo <replaceable class="parameter">text</replaceable> [ ... ]</literal></term>
<listitem>