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Update information_schema documentation to match system tables.

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Backpatch to 8.2.X.
This commit is contained in:
Bruce Momjian
2007-02-20 18:47:34 +00:00
parent 57bcfe0065
commit 6f9027372b
1 changed files with 4 additions and 13 deletions
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17
doc/src/sgml/information_schema.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/information_schema.sgml,v 1.29 2006/10/23 18:10:31 petere Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/information_schema.sgml,v 1.29.2.1 2007/02/20 18:47:34 momjian Exp $ -->
<chapter id="information-schema">
<title>The Information Schema</title>
@ -1876,7 +1876,7 @@
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.array_type_identifier))
= (e.object_catalog, e.object_schema, e.object_name, e.object_type, e.dtd_identifier))
WHERE c.table_schema = '...' AND c.table_name = '...'
ORDER BY c.ordinal_position;
</programlisting>
@ -1936,13 +1936,11 @@ ORDER BY c.ordinal_position;
</row>
<row>
<entry><literal>array_type_identifier</literal></entry>
<entry><literal>dtd_identifier</literal></entry>
<entry><type>sql_identifier</type></entry>
<entry>
The identifier of the data type descriptor of the array being
described. Use this to join with the
<literal>dtd_identifier</literal> columns of other information
schema views.
described
</entry>
</row>
@ -2097,13 +2095,6 @@ 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>