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SQL procedures

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This adds a new object type "procedure" that is similar to a function
but does not have a return type and is invoked by the new CALL statement
instead of SELECT or similar.  This implementation is aligned with the
SQL standard and compatible with or similar to other SQL implementations.

This commit adds new commands CALL, CREATE/ALTER/DROP PROCEDURE, as well
as ALTER/DROP ROUTINE that can refer to either a function or a
procedure (or an aggregate function, as an extension to SQL).  There is
also support for procedures in various utility commands such as COMMENT
and GRANT, as well as support in pg_dump and psql.  Support for defining
procedures is available in all the languages supplied by the core
distribution.

While this commit is mainly syntax sugar around existing functionality,
future features will rely on having procedures as a separate object
type.

Reviewed-by: Andrew Dunstan <andrew.dunstan@2ndquadrant.com>
This commit is contained in:
Peter Eisentraut
2017-11-30 08:46:13 -05:00
parent 1761653bbb
commit e4128ee767
92 changed files with 2952 additions and 306 deletions
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12
doc/src/sgml/ref/alter_extension.sgml
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@@ -45,6 +45,8 @@ ALTER EXTENSION <replaceable class="parameter">name</replaceable> DROP <replacea
OPERATOR CLASS <replaceable class="parameter">object_name</replaceable> USING <replaceable class="parameter">index_method</replaceable> |
OPERATOR FAMILY <replaceable class="parameter">object_name</replaceable> USING <replaceable class="parameter">index_method</replaceable> |
[ PROCEDURAL ] LANGUAGE <replaceable class="parameter">object_name</replaceable> |
PROCEDURE <replaceable class="parameter">procedure_name</replaceable> [ ( [ [ <replaceable class="parameter">argmode</replaceable> ] [ <replaceable class="parameter">argname</replaceable> ] <replaceable class="parameter">argtype</replaceable> [, ...] ] ) ] |
ROUTINE <replaceable class="parameter">routine_name</replaceable> [ ( [ [ <replaceable class="parameter">argmode</replaceable> ] [ <replaceable class="parameter">argname</replaceable> ] <replaceable class="parameter">argtype</replaceable> [, ...] ] ) ] |
SCHEMA <replaceable class="parameter">object_name</replaceable> |
SEQUENCE <replaceable class="parameter">object_name</replaceable> |
SERVER <replaceable class="parameter">object_name</replaceable> |
@@ -170,12 +172,14 @@ ALTER EXTENSION <replaceable class="parameter">name</replaceable> DROP <replacea
<term><replaceable class="parameter">aggregate_name</replaceable></term>
<term><replaceable class="parameter">function_name</replaceable></term>
<term><replaceable class="parameter">operator_name</replaceable></term>
<term><replaceable class="parameter">procedure_name</replaceable></term>
<term><replaceable class="parameter">routine_name</replaceable></term>
<listitem>
<para>
The name of an object to be added to or removed from the extension.
Names of tables,
aggregates, domains, foreign tables, functions, operators,
operator classes, operator families, sequences, text search objects,
operator classes, operator families, procedures, routines, sequences, text search objects,
types, and views can be schema-qualified.
</para>
</listitem>
@@ -204,7 +208,7 @@ ALTER EXTENSION <replaceable class="parameter">name</replaceable> DROP <replacea
<listitem>
<para>
The mode of a function or aggregate
The mode of a function, procedure, or aggregate
argument: <literal>IN</literal>, <literal>OUT</literal>,
<literal>INOUT</literal>, or <literal>VARIADIC</literal>.
If omitted, the default is <literal>IN</literal>.
@@ -222,7 +226,7 @@ ALTER EXTENSION <replaceable class="parameter">name</replaceable> DROP <replacea
<listitem>
<para>
The name of a function or aggregate argument.
The name of a function, procedure, or aggregate argument.
Note that <command>ALTER EXTENSION</command> does not actually pay
any attention to argument names, since only the argument data
types are needed to determine the function's identity.
@@ -235,7 +239,7 @@ ALTER EXTENSION <replaceable class="parameter">name</replaceable> DROP <replacea
<listitem>
<para>
The data type of a function or aggregate argument.
The data type of a function, procedure, or aggregate argument.
</para>
</listitem>
</varlistentry>