From 7d43ae6713223164be017be6e866868d1d7a8430 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter_e@gmx.net>
Date: Thu, 9 Jun 2011 07:24:14 +0300
Subject: [PATCH] Fix documentation of information_schema.element_types
The documentation of the columns collection_type_identifier and
dtd_identifier was wrong. This effectively reverts commits
8e1ccad51901e83916dae297cd9afa450957a36c and
57352df66d3a0885899d39c04c067e63c7c0ba30 and updates the name
array_type_identifier (the name in SQL:1999) to
collection_type_identifier.
closes bug #5926
---
doc/src/sgml/information_schema.sgml | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/doc/src/sgml/information_schema.sgml b/doc/src/sgml/information_schema.sgml
index a60014267ea..6df69db4aad 100644
--- a/doc/src/sgml/information_schema.sgml
+++ b/doc/src/sgml/information_schema.sgml
@@ -2159,7 +2159,7 @@
SELECT c.column_name, c.data_type, e.data_type AS element_type
FROM information_schema.columns c LEFT JOIN information_schema.element_types e
ON ((c.table_catalog, c.table_schema, c.table_name, 'TABLE', c.dtd_identifier)
- = (e.object_catalog, e.object_schema, e.object_name, e.object_type, e.dtd_identifier))
+ = (e.object_catalog, e.object_schema, e.object_name, e.object_type, e.collection_type_identifier))
WHERE c.table_schema = '...' AND c.table_name = '...'
ORDER BY c.ordinal_position;
</programlisting>
@@ -2219,11 +2219,13 @@ ORDER BY c.ordinal_position;
</row>
<row>
- <entry><literal>dtd_identifier</literal></entry>
+ <entry><literal>collection_type_identifier</literal></entry>
<entry><type>sql_identifier</type></entry>
<entry>
The identifier of the data type descriptor of the array being
- described
+ described. Use this to join with the
+ <literal>dtd_identifier</literal> columns of other information
+ schema views.
</entry>
</row>
@@ -2378,6 +2380,14 @@ ORDER BY c.ordinal_position;
<entry>Always null, because arrays always have unlimited maximum cardinality in <productname>PostgreSQL</></entry>
</row>
+ <row>
+ <entry><literal>dtd_identifier</literal></entry>
+ <entry><type>sql_identifier</type></entry>
+ <entry>
+ An identifier of the data type descriptor of the element. This
+ is currently not useful.
+ </entry>
+ </row>
</tbody>
</tgroup>
</table>
--
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