database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-08-28 18:48:04 +03:00
Code Activity

Second phase of committing Rod Taylor's pg_depend/pg_constraint patch.

Browse Source 
pg_relcheck is gone; CHECK, UNIQUE, PRIMARY KEY, and FOREIGN KEY
constraints all have real live entries in pg_constraint.  pg_depend
exists, and RESTRICT/CASCADE options work on most kinds of DROP;
however, pg_depend is not yet very well populated with dependencies.
(Most of the ones that are present at this point just replace formerly
hardwired associations, such as the implicit drop of a relation's pg_type
entry when the relation is dropped.)  Need to add more logic to create
dependency entries, improve pg_dump to dump constraints in place of
indexes and triggers, and add some regression tests.
This commit is contained in:
Tom Lane
2002-07-12 18:43:19 +00:00
parent 791a40f943
commit 7c6df91dda
77 changed files with 4074 additions and 1987 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
doc/src/sgml/ref/drop_table.sgml
View File

@@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_table.sgml,v 1.15 2002/05/18 15:44:47 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_table.sgml,v 1.16 2002/07/12 18:43:13 tgl Exp $
PostgreSQL documentation
-->
@@ -21,7 +21,8 @@ PostgreSQL documentation
<date>1999-07-20</date>
</refsynopsisdivinfo>
<synopsis>
DROP TABLE <replaceable class="PARAMETER">name</replaceable> [, ...]
DROP TABLE <replaceable class="PARAMETER">name</replaceable> [, ...] [ CASCADE | RESTRICT ]
</synopsis>
<refsect2 id="R2-SQL-DROPTABLE-1">
@@ -41,6 +42,24 @@ DROP TABLE <replaceable class="PARAMETER">name</replaceable> [, ...]
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>CASCADE</term>
<listitem>
<para>
Automatically drop objects that depend on the table
(such as views).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RESTRICT</term>
<listitem>
<para>
Refuse to drop the table if there are any dependent objects.
This is the default.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>
@@ -136,44 +155,11 @@ DROP TABLE films, distributors;
</title>
<refsect2 id="R2-SQL-DROPTABLE-4">
<refsect2info>
<date>1998-09-22</date>
</refsect2info>
<title>
SQL92
</title>
<para>
SQL92 specifies some additional capabilities for DROP TABLE:
</para>
<synopsis>
DROP TABLE <replaceable class="parameter">table</replaceable> { RESTRICT | CASCADE }
</synopsis>
<variablelist>
<varlistentry>
<term>RESTRICT</term>
<listitem>
<para>
Ensures that only a table with no dependent views or
integrity constraints can be destroyed.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>CASCADE</term>
<listitem>
<para>
Any referencing views or integrity constraints
will also be dropped.
</para>
</listitem>
</varlistentry>
</variablelist>
<tip>
<para>
At present, to remove a referencing view you must drop
it explicitly.
</para>
</tip>
</refsect2>
</refsect1>
</refentry>