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Commite4128ee

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SQL procedures
This adds a new object type "procedure" that is similar to a functionbut does not have a return type and is invoked by the new CALL statementinstead of SELECT or similar. This implementation is aligned with theSQL standard and compatible with or similar to other SQL implementations.This commit adds new commands CALL, CREATE/ALTER/DROP PROCEDURE, as wellas ALTER/DROP ROUTINE that can refer to either a function or aprocedure (or an aggregate function, as an extension to SQL). There isalso support for procedures in various utility commands such as COMMENTand GRANT, as well as support in pg_dump and psql. Support for definingprocedures is available in all the languages supplied by the coredistribution.While this commit is mainly syntax sugar around existing functionality,future features will rely on having procedures as a separate objecttype.Reviewed-by: Andrew Dunstan <andrew.dunstan@2ndquadrant.com>
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‎doc/src/sgml/catalogs.sgml‎

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@@ -5241,7 +5241,7 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
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<entry><structfield>prorettype</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-type"><structname>pg_type</structname></link>.oid</literal></entry>
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<entry>Data type of the return value</entry>
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<entry>Data type of the return value, or null for a procedure</entry>
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</row>
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<row>

‎doc/src/sgml/ddl.sgml‎

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@@ -3947,7 +3947,7 @@ EXPLAIN SELECT count(*) FROM measurement WHERE logdate &gt;= DATE '2008-01-01';
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<listitem>
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<para>
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Functions and operators
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Functions, procedures, and operators
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</para>
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</listitem>
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‎doc/src/sgml/ecpg.sgml‎

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@@ -4778,7 +4778,9 @@ EXEC SQL WHENEVER <replaceable>condition</replaceable> <replaceable>action</repl
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<term><literal>DO <replaceable>name</replaceable> (<replaceable>args</replaceable>)</literal></term>
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<listitem>
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<para>
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Call the specified C functions with the specified arguments.
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Call the specified C functions with the specified arguments. (This
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use is different from the meaning of <literal>CALL</literal>
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and <literal>DO</literal> in the normal PostgreSQL grammar.)
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</para>
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</listitem>
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</varlistentry>

‎doc/src/sgml/information_schema.sgml‎

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@@ -3972,8 +3972,8 @@ ORDER BY c.ordinal_position;
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<title><literal>routines</literal></title>
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<para>
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The view <literal>routines</literal> contains all functions in the
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current database. Only those functions are shown that the current
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The view <literal>routines</literal> contains all functionsand proceduresin the
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current database. Only those functionsand proceduresare shown that the current
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user has access to (by way of being the owner or having some
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privilege).
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</para>
@@ -4037,8 +4037,8 @@ ORDER BY c.ordinal_position;
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<entry><literal>routine_type</literal></entry>
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<entry><type>character_data</type></entry>
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<entry>
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Always<literal>FUNCTION</literal>(In the future there might
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be other types of routines.)
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<literal>FUNCTION</literal>for a
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function, <literal>PROCEDURE</literal> for a procedure
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</entry>
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</row>
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@@ -4087,7 +4087,7 @@ ORDER BY c.ordinal_position;
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the view <literal>element_types</literal>), else
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<literal>USER-DEFINED</literal> (in that case, the type is
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identified in <literal>type_udt_name</literal> and associated
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columns).
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columns). Null for a procedure.
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</entry>
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</row>
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@@ -4180,7 +4180,7 @@ ORDER BY c.ordinal_position;
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<entry><type>sql_identifier</type></entry>
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<entry>
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Name of the database that the return data type of the function
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is defined in (always the current database)
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is defined in (always the current database). Null for a procedure.
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</entry>
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</row>
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@@ -4189,15 +4189,15 @@ ORDER BY c.ordinal_position;
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<entry><type>sql_identifier</type></entry>
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<entry>
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Name of the schema that the return data type of the function is
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defined in
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defined in. Null for a procedure.
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</entry>
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</row>
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<row>
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<entry><literal>type_udt_name</literal></entry>
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<entry><type>sql_identifier</type></entry>
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<entry>
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Name of the return data type of the function
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Name of the return data type of the function. Null for a procedure.
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</entry>
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</row>
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@@ -4314,7 +4314,7 @@ ORDER BY c.ordinal_position;
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<entry>
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If the function automatically returns null if any of its
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arguments are null, then <literal>YES</literal>, else
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<literal>NO</literal>.
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<literal>NO</literal>. Null for a procedure.
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</entry>
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</row>
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‎doc/src/sgml/plperl.sgml‎

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@@ -67,6 +67,10 @@ $$ LANGUAGE plperl;
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as discussed below.
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</para>
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<para>
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In a PL/Perl procedure, any return value from the Perl code is ignored.
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</para>
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<para>
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PL/Perl also supports anonymous code blocks called with the
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<xref linkend="sql-do"/> statement:

‎doc/src/sgml/plpgsql.sgml‎

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@@ -156,7 +156,8 @@
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<para>
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Finally, a <application>PL/pgSQL</application> function can be declared to return
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<type>void</type> if it has no useful return value.
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<type>void</type> if it has no useful return value. (Alternatively, it
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could be written as a procedure in that case.)
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</para>
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<para>
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</sect3>
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</sect2>
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<sect2 id="plpgsql-statements-returning-procedure">
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<title>Returning From a Procedure</title>
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<para>
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A procedure does not have a return value. A procedure can therefore end
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without a <command>RETURN</command> statement. If
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a <command>RETURN</command> statement is desired to exit the code early,
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then <symbol>NULL</symbol> must be returned. Returning any other value
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will result in an error.
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</para>
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</sect2>
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<sect2 id="plpgsql-conditionals">
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<title>Conditionals</title>
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@@ -5244,7 +5257,7 @@ show errors;
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<para>
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Here is how this function would end up in <productname>PostgreSQL</productname>:
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<programlisting>
5247-
CREATE OR REPLACEFUNCTION cs_update_referrer_type_proc() RETURNS void AS $func$
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CREATE OR REPLACEPROCEDURE cs_update_referrer_type_proc() AS $func$
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DECLARE
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referrer_keys CURSOR IS
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SELECT * FROM cs_referrer_keys

‎doc/src/sgml/plpython.sgml‎

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@@ -207,7 +207,11 @@ $$ LANGUAGE plpythonu;
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<literal>yield</literal> (in case of a result-set statement). If
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you do not provide a return value, Python returns the default
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<symbol>None</symbol>. <application>PL/Python</application> translates
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Python's <symbol>None</symbol> into the SQL null value.
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Python's <symbol>None</symbol> into the SQL null value. In a procedure,
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the result from the Python code must be <symbol>None</symbol> (typically
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achieved by ending the procedure without a <literal>return</literal>
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statement or by using a <literal>return</literal> statement without
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argument); otherwise, an error will be raised.
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</para>
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<para>

‎doc/src/sgml/pltcl.sgml‎

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@@ -97,7 +97,8 @@ $$ LANGUAGE pltcl;
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Tcl script as variables named <literal>1</literal>
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... <literal><replaceable>n</replaceable></literal>. The result is
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returned from the Tcl code in the usual way, with
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a <literal>return</literal> statement.
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a <literal>return</literal> statement. In a procedure, the return value
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from the Tcl code is ignored.
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</para>
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<para>

‎doc/src/sgml/ref/allfiles.sgml‎

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@@ -26,8 +26,10 @@ Complete list of usable sgml source files in this directory.
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<!ENTITY alterOperatorClass SYSTEM "alter_opclass.sgml">
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<!ENTITY alterOperatorFamily SYSTEM "alter_opfamily.sgml">
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<!ENTITY alterPolicy SYSTEM "alter_policy.sgml">
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<!ENTITY alterProcedure SYSTEM "alter_procedure.sgml">
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<!ENTITY alterPublication SYSTEM "alter_publication.sgml">
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<!ENTITY alterRole SYSTEM "alter_role.sgml">
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<!ENTITY alterRoutine SYSTEM "alter_routine.sgml">
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<!ENTITY alterRule SYSTEM "alter_rule.sgml">
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<!ENTITY alterSchema SYSTEM "alter_schema.sgml">
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<!ENTITY alterServer SYSTEM "alter_server.sgml">
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<!ENTITY alterView SYSTEM "alter_view.sgml">
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<!ENTITY analyze SYSTEM "analyze.sgml">
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<!ENTITY begin SYSTEM "begin.sgml">
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<!ENTITY call SYSTEM "call.sgml">
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<!ENTITY checkpoint SYSTEM "checkpoint.sgml">
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<!ENTITY close SYSTEM "close.sgml">
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<!ENTITY cluster SYSTEM "cluster.sgml">
@@ -75,6 +78,7 @@ Complete list of usable sgml source files in this directory.
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<!ENTITY createOperatorClass SYSTEM "create_opclass.sgml">
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<!ENTITY createOperatorFamily SYSTEM "create_opfamily.sgml">
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<!ENTITY createPolicy SYSTEM "create_policy.sgml">
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<!ENTITY createProcedure SYSTEM "create_procedure.sgml">
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<!ENTITY createPublication SYSTEM "create_publication.sgml">
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<!ENTITY createRole SYSTEM "create_role.sgml">
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<!ENTITY createRule SYSTEM "create_rule.sgml">
@@ -122,8 +126,10 @@ Complete list of usable sgml source files in this directory.
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<!ENTITY dropOperatorFamily SYSTEM "drop_opfamily.sgml">
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<!ENTITY dropOwned SYSTEM "drop_owned.sgml">
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<!ENTITY dropPolicy SYSTEM "drop_policy.sgml">
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<!ENTITY dropProcedure SYSTEM "drop_procedure.sgml">
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<!ENTITY dropPublication SYSTEM "drop_publication.sgml">
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<!ENTITY dropRole SYSTEM "drop_role.sgml">
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<!ENTITY dropRoutine SYSTEM "drop_routine.sgml">
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<!ENTITY dropRule SYSTEM "drop_rule.sgml">
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<!ENTITY dropSchema SYSTEM "drop_schema.sgml">
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<!ENTITY dropSequence SYSTEM "drop_sequence.sgml">

‎doc/src/sgml/ref/alter_default_privileges.sgml‎

Lines changed: 9 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -39,7 +39,7 @@ GRANT { { USAGE | SELECT | UPDATE }
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TO { [ GROUP ] <replaceable class="parameter">role_name</replaceable> | PUBLIC } [, ...] [ WITH GRANT OPTION ]
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4141
GRANT { EXECUTE | ALL [ PRIVILEGES ] }
42-
ON FUNCTIONS
42+
ON{FUNCTIONS | ROUTINES }
4343
TO { [ GROUP ] <replaceable class="parameter">role_name</replaceable> | PUBLIC } [, ...] [ WITH GRANT OPTION ]
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4545
GRANT { USAGE | ALL [ PRIVILEGES ] }
@@ -66,7 +66,7 @@ REVOKE [ GRANT OPTION FOR ]
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6767
REVOKE [ GRANT OPTION FOR ]
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{ EXECUTE | ALL [ PRIVILEGES ] }
69-
ON FUNCTIONS
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ON{FUNCTIONS | ROUTINES }
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FROM { [ GROUP ] <replaceable class="parameter">role_name</replaceable> | PUBLIC } [, ...]
7171
[ CASCADE | RESTRICT ]
7272

@@ -93,7 +93,13 @@ REVOKE [ GRANT OPTION FOR ]
9393
affect privileges assigned to already-existing objects.) Currently,
9494
only the privileges for schemas, tables (including views and foreign
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tables), sequences, functions, and types (including domains) can be
96-
altered.
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altered. For this command, functions include aggregates and procedures.
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The words <literal>FUNCTIONS</literal> and <literal>ROUTINES</literal> are
98+
equivalent in this command. (<literal>ROUTINES</literal> is preferred
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going forward as the standard term for functions and procedures taken
100+
together. In earlier PostgreSQL releases, only the
101+
word <literal>FUNCTIONS</literal> was allowed. It is not possible to set
102+
default privileges for functions and procedures separately.)
97103
</para>
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99105
<para>

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