doc: fix description of backward_scan

The description of the index property backward_scan was incorrect and misleading; rectify. Backpatch to 9.6 where the amutils functionality was introduced.
7 years ago · 93f6c6328d
parent 91ff29f036
commit 93f6c6328d
1 changed files with 3 additions and 1 deletions
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@ -17519,7 +17519,9 @@ SELECT currval(pg_get_serial_sequence('sometable', 'id'));
     </row>
     <row>
      <entry><literal>backward_scan</literal></entry>
-      <entry>Can the index be scanned backwards?
+      <entry>Can the scan direction be changed in mid-scan (to
+             support <literal>FETCH BACKWARD</literal> on a cursor without
+             needing materialization)?
      </entry>
     </row>
    </tbody>