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1 | | -<!-- $PostgreSQL: pgsql/doc/src/sgml/xindex.sgml,v 1.50 2006/09/21 15:03:53 teodor Exp $ --> |
| 1 | +<!-- $PostgreSQL: pgsql/doc/src/sgml/xindex.sgml,v 1.51 2006/09/21 15:09:38 teodor Exp $ --> |
2 | 2 |
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3 | 3 | <sect1 id="xindex"> |
4 | 4 | <title>Interfacing Extensions To Indexes</title> |
@@ -822,11 +822,12 @@ CREATE OPERATOR CLASS polygon_ops |
822 | 822 | STORAGE box; |
823 | 823 | </programlisting> |
824 | 824 |
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825 | | - At present, only the GiST index method supports a |
| 825 | + At present, only the GiSTand GINindex method supports a |
826 | 826 | <literal>STORAGE</> type that's different from the column data type. |
827 | 827 | The GiST <literal>compress</> and <literal>decompress</> support |
828 | 828 | routines must deal with data-type conversion when <literal>STORAGE</> |
829 | | - is used. |
| 829 | + is used. Functions named <literal>extractValue</> and <literal>extractQuery</> |
| 830 | + do conversation into internally used types for GIN. |
830 | 831 | </para> |
831 | 832 | </sect2> |
832 | 833 |
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