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Fix documentation of information_schema.element_types

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The documentation of the columns collection_type_identifier and
dtd_identifier was wrong.  This effectively reverts commits
8e1ccad519 and
57352df66d and updates the name
array_type_identifier (the name in SQL:1999) to
collection_type_identifier.

closes bug #5926
This commit is contained in:
Peter Eisentraut 2011-06-09 07:24:14 +03:00
parent cb252c2acd
commit ffa653b945
1 changed files with 13 additions and 3 deletions
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16
doc/src/sgml/information_schema.sgml
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@ -1884,7 +1884,7 @@
SELECT c.column_name, c.data_type, e.data_type AS element_type 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 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) 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 = '...' WHERE c.table_schema = '...' AND c.table_name = '...'
ORDER BY c.ordinal_position; ORDER BY c.ordinal_position;
</programlisting> </programlisting>
@ -1944,11 +1944,13 @@ ORDER BY c.ordinal_position;
</row> </row>
<row> <row>
<entry><literal>dtd_identifier</literal></entry> <entry><literal>collection_type_identifier</literal></entry>
<entry><type>sql_identifier</type></entry> <entry><type>sql_identifier</type></entry>
<entry> <entry>
The identifier of the data type descriptor of the array being 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> </entry>
</row> </row>
@ -2103,6 +2105,14 @@ ORDER BY c.ordinal_position;
<entry>Always null, because arrays always have unlimited maximum cardinality in <productname>PostgreSQL</></entry> <entry>Always null, because arrays always have unlimited maximum cardinality in <productname>PostgreSQL</></entry>
</row> </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> </tbody>
</tgroup> </tgroup>
</table> </table>