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ALTER TABLE SET/DROP NOT NULL, from Christopher Kings-Lynne.

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This commit is contained in:
Tom Lane
2002-04-01 04:35:40 +00:00
parent 838fe25a95
commit 9b77f61930
9 changed files with 510 additions and 49 deletions
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18
doc/src/sgml/ref/alter_table.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.40 2002/03/06 20:42:38 momjian Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.41 2002/04/01 04:35:37 tgl Exp $
PostgreSQL documentation
-->
@ -28,6 +28,8 @@ ALTER TABLE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> [ * ]
ALTER TABLE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> [ * ]
ALTER [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> { SET DEFAULT <replaceable
class="PARAMETER">value</replaceable> | DROP DEFAULT }
ALTER TABLE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> [ * ]
ALTER [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> { SET | DROP } NOT NULL
ALTER TABLE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> [ * ]
ALTER [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> SET STATISTICS <replaceable class="PARAMETER">integer</replaceable>
ALTER TABLE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> [ * ]
@ -168,6 +170,9 @@ ALTER TABLE <replaceable class="PARAMETER">table</replaceable>
allow you to set or remove the default for the column. Note that defaults
only apply to subsequent <command>INSERT</command> commands; they do not
cause rows already in the table to change.
The <literal>ALTER COLUMN SET/DROP NOT NULL</literal> forms allow you to
change whether a column is marked to allow NULL values or to reject NULL
values.
The <literal>ALTER COLUMN SET STATISTICS</literal> form allows you to
set the statistics-gathering target for subsequent
<xref linkend="sql-analyze" endterm="sql-analyze-title"> operations.
@ -279,6 +284,17 @@ ALTER TABLE distributors RENAME TO suppliers;
</programlisting>
</para>
<para>
To add a NOT NULL constraint to a column:
<programlisting>
ALTER TABLE distributors ALTER COLUMN street SET NOT NULL;
</programlisting>
To remove a NOT NULL constraint from a column:
<programlisting>
ALTER TABLE distributors ALTER COLUMN street DROP NOT NULL;
</programlisting>
</para>
<para>
To add a check constraint to a table:
<programlisting>

3
doc/src/sgml/release.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.128 2002/03/25 21:24:08 momjian Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.129 2002/04/01 04:35:37 tgl Exp $
-->
<appendix id="release">
@ -24,6 +24,7 @@ CDATA means the content is "SGML-free", so you can write without
worries about funny characters.
-->
<literallayout><![CDATA[
ALTER TABLE ALTER COLUMN SET/DROP NOT NULL
EXPLAIN output comes out as a query result, not a NOTICE message
DOMAINs (types that are constrained versions of base types)
Access privileges on functions