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-rw-r--r--doc/src/sgml/information_schema.sgml16
1 files changed, 13 insertions, 3 deletions
diff --git a/doc/src/sgml/information_schema.sgml b/doc/src/sgml/information_schema.sgml
index b6e143c5da5..8fa3f85190a 100644
--- a/doc/src/sgml/information_schema.sgml
+++ b/doc/src/sgml/information_schema.sgml
@@ -1878,7 +1878,7 @@
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>
@@ -1938,11 +1938,13 @@ 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>
@@ -2097,6 +2099,14 @@ 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>