Sophie: postgresql8.4-docs-8.4.12-0.1mdv2010.2 i586

postgresql8.4-docs-8.4.12-0.1mdv2010.2.i586.rpm

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>PostgreSQL 8.4.12 Documentation</TH
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>Appendix F. Additional Supplied Modules</TD
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><A
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>F.4. btree_gist</A
></H1
><A
NAME="AEN114437"
></A
><P
>  <TT
CLASS="FILENAME"
>btree_gist</TT
> provides sample GiST operator classes that
  implement B-Tree equivalent behavior for the data types
  <TT
CLASS="TYPE"
>int2</TT
>, <TT
CLASS="TYPE"
>int4</TT
>, <TT
CLASS="TYPE"
>int8</TT
>, <TT
CLASS="TYPE"
>float4</TT
>,
  <TT
CLASS="TYPE"
>float8</TT
>, <TT
CLASS="TYPE"
>numeric</TT
>, <TT
CLASS="TYPE"
>timestamp with time zone</TT
>,
  <TT
CLASS="TYPE"
>timestamp without time zone</TT
>, <TT
CLASS="TYPE"
>time with time zone</TT
>,
  <TT
CLASS="TYPE"
>time without time zone</TT
>, <TT
CLASS="TYPE"
>date</TT
>, <TT
CLASS="TYPE"
>interval</TT
>,
  <TT
CLASS="TYPE"
>oid</TT
>, <TT
CLASS="TYPE"
>money</TT
>, <TT
CLASS="TYPE"
>char</TT
>,
  <TT
CLASS="TYPE"
>varchar</TT
>, <TT
CLASS="TYPE"
>text</TT
>, <TT
CLASS="TYPE"
>bytea</TT
>, <TT
CLASS="TYPE"
>bit</TT
>,
  <TT
CLASS="TYPE"
>varbit</TT
>, <TT
CLASS="TYPE"
>macaddr</TT
>, <TT
CLASS="TYPE"
>inet</TT
>, and <TT
CLASS="TYPE"
>cidr</TT
>.
 </P
><P
>  In general, these operator classes will not outperform the equivalent
  standard btree index methods, and they lack one major feature of the
  standard btree code: the ability to enforce uniqueness.  However,
  they are useful for GiST testing and as a base for developing other
  GiST operator classes.
 </P
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>F.4.1. Example usage</A
></H2
><PRE
CLASS="PROGRAMLISTING"
>CREATE TABLE test (a int4);
-- create index
CREATE INDEX testidx ON test USING gist (a);
-- query
SELECT * FROM test WHERE a &lt; 10;</PRE
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><A
NAME="AEN114468"
>F.4.2. Authors</A
></H2
><P
>   Teodor Sigaev (<CODE
CLASS="EMAIL"
>&#60;<A
HREF="mailto:teodor@stack.net"
>teodor@stack.net</A
>&#62;</CODE
>) ,
   Oleg Bartunov (<CODE
CLASS="EMAIL"
>&#60;<A
HREF="mailto:oleg@sai.msu.su"
>oleg@sai.msu.su</A
>&#62;</CODE
>), and
   Janko Richter (<CODE
CLASS="EMAIL"
>&#60;<A
HREF="mailto:jankorichter@yahoo.de"
>jankorichter@yahoo.de</A
>&#62;</CODE
>).  See
   <A
HREF="http://www.sai.msu.su/~megera/postgres/gist"
TARGET="_top"
>http://www.sai.msu.su/~megera/postgres/gist</A
>
   for additional information.
  </P
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