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doc: clarify how dropping of extensions affects dependent objs. 

Clarify that functions/procedures are dropped when any extension that
depends on them is dropped.

Reported-by: David G. Johnston

Discussion: https://postgr.es/m/CAKFQuwbPSHMDGkisRUmewopweC1bFvytVqB=a=X4GFg=4ZWxPA@mail.gmail.com

Backpatch-through: 13
This commit is contained in:
Bruce Momjian 2022-07-14 17:41:03 -04:00
parent 2d4c6437c8
commit ef9d0cf19c
3 changed files with 16 additions and 7 deletions
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6
doc/src/sgml/ref/alter_function.sgml
View File

@ -160,8 +160,10 @@ ALTER FUNCTION <replaceable>name</replaceable> [ ( [ [ <replaceable class="param
<para>
This form marks the function as dependent on the extension, or no longer
dependent on that extension if <literal>NO</literal> is specified.
A function that's marked as dependent on an extension is automatically
dropped when the extension is dropped.
A function that's marked as dependent on an extension is dropped when the
extension is dropped, even if <literal>CASCADE</literal> is not specified.
A function can depend upon multiple extensions, and will be dropped when
any one of those extensions is dropped.
</para>
</listitem>
</varlistentry>

7
doc/src/sgml/ref/alter_procedure.sgml
View File

@ -144,7 +144,12 @@ ALTER PROCEDURE <replaceable>name</replaceable> [ ( [ [ <replaceable class="para
<term><replaceable class="parameter">extension_name</replaceable></term>
<listitem>
<para>
The name of the extension that the procedure is to depend on.
This form marks the procedure as dependent on the extension, or no longer
dependent on the extension if <literal>NO</literal> is specified.
A procedure that's marked as dependent on an extension is dropped when the
extension is dropped, even if cascade is not specified.
A procedure can depend upon multiple extensions, and will be dropped when
any one of those extensions is dropped.
</para>
</listitem>
</varlistentry>

10
doc/src/sgml/ref/drop_extension.sgml
View File

@ -30,7 +30,9 @@ DROP EXTENSION [ IF EXISTS ] <replaceable class="parameter">name</replaceable> [
<para>
<command>DROP EXTENSION</command> removes extensions from the database.
Dropping an extension causes its component objects to be dropped as well.
Dropping an extension causes its component objects, and other explicitly
dependent routines (see <xref linkend="sql-alterroutine"/>,
the depends on extension action), to be dropped as well.
</para>
<para>
@ -77,9 +79,9 @@ DROP EXTENSION [ IF EXISTS ] <replaceable class="parameter">name</replaceable> [
<term><literal>RESTRICT</literal></term>
<listitem>
<para>
Refuse to drop the extension if any objects depend on it (other than
its own member objects and other extensions listed in the same
<command>DROP</command> command). This is the default.
This option prevents the specified extensions from being dropped
if there exists non-extension-member objects that depends on any
the extensions. This is the default.
</para>
</listitem>
</varlistentry>