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Upgrade ALTER TABLE DROP COLUMN so that it can drop an OID column, and

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remove separate implementation of ALTER TABLE SET WITHOUT OIDS in favor
of doing a regular DROP.  Also, cause CREATE TABLE to account completely
correctly for the inheritance status of the OID column.  This fixes
problems with dropping OID columns that have dependencies, as noted by
Christopher Kings-Lynne, as well as making sure that you can't drop an
OID column that was inherited from a parent.
This commit is contained in:
Tom Lane
2004-03-23 19:35:17 +00:00
parent 446b5476e5
commit 24614a9880
11 changed files with 151 additions and 167 deletions
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13
doc/src/sgml/ref/alter_table.sgml
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@@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.66 2004/03/09 16:57:47 neilc Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.67 2004/03/23 19:35:15 tgl Exp $
PostgreSQL documentation
-->
@@ -150,12 +150,11 @@ ALTER TABLE <replaceable class="PARAMETER">name</replaceable>
<term><literal>SET WITHOUT OIDS</literal></term>
<listitem>
<para>
This form removes the <literal>oid</literal> column from the
table. Removing OIDs from a table does not occur immediately.
The space that the OID uses will be reclaimed when the row is
updated. Without updating the row, both the space and the value
of the OID are kept indefinitely. This is semantically similar
to the <literal>DROP COLUMN</literal> process.
This form removes the <literal>oid</literal> system column from the
table. This is exactly equivalent to
<literal>DROP COLUMN oid RESTRICT</literal>,
except that it will not complain if there is already no
<literal>oid</literal> column.
</para>
<para>