diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/xindex.sgml | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/doc/src/sgml/xindex.sgml b/doc/src/sgml/xindex.sgml index 333a36c4562..745b4d5619a 100644 --- a/doc/src/sgml/xindex.sgml +++ b/doc/src/sgml/xindex.sgml @@ -436,7 +436,8 @@ </table> <para> - Hash indexes require one support function, shown in <xref + Hash indexes require one support function, and allow a second one to be + supplied at the operator class author's option, as shown in <xref linkend="xindex-hash-support-table">. </para> @@ -451,9 +452,17 @@ </thead> <tbody> <row> - <entry>Compute the hash value for a key</entry> + <entry>Compute the 32-bit hash value for a key</entry> <entry>1</entry> </row> + <row> + <entry> + Compute the 64-bit hash value for a key given a 64-bit salt; if + the salt is 0, the low 32 bits will match the value that would + have been computed by function 1 + </entry> + <entry>2</entry> + </row> </tbody> </tgroup> </table> |