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Code review for CREATE OR REPLACE VIEW patch. Do things in a saner order to

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result in hopefully-less-confusing error messages when the new definition
isn't compatible with the old; minor other cleanup.
This commit is contained in:
Tom Lane
2008-12-15 21:35:31 +00:00
parent 78b25fd2e9
commit 4da65a23e7
4 changed files with 56 additions and 46 deletions
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13
doc/src/sgml/ref/create_view.sgml
View File

@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/create_view.sgml,v 1.38 2008/12/06 23:22:46 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/create_view.sgml,v 1.39 2008/12/15 21:35:31 tgl Exp $
PostgreSQL documentation
-->
@ -38,9 +38,10 @@ CREATE [ OR REPLACE ] [ TEMP | TEMPORARY ] VIEW <replaceable class="PARAMETER">n
<para>
<command>CREATE OR REPLACE VIEW</command> is similar, but if a view
of the same name already exists, it is replaced. The new query must
generate all of the same columns that were generated by the original query
in the same order and with the same data types, but may add additional
columns to the end of the list.
generate the same columns that were generated by the existing view query
(that is, the same column names in the same order and with the same data
types), but it may add additional columns to the end of the list. The
calculations giving rise to the output columns may be completely different.
</para>
<para>
@ -77,7 +78,7 @@ CREATE [ OR REPLACE ] [ TEMP | TEMPORARY ] VIEW <replaceable class="PARAMETER">n
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">name</replaceable></term>
<listitem>
@ -164,7 +165,7 @@ CREATE VIEW comedies AS
</programlisting>
</para>
</refsect1>
<refsect1>
<title>Compatibility</title>