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Fix obsolete claim that only btree indexes support multiple columns; 

GiST does now, too.  (Someone needs to write a description of GiST
to add to this chapter.  I don't know enough about it ...)
This commit is contained in:
Tom Lane 2001-11-18 00:59:00 +00:00
parent 0729c4a61f
commit 5906d7e096
1 changed files with 4 additions and 4 deletions
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8
doc/src/sgml/indices.sgml
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@ -1,4 +1,4 @@
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/indices.sgml,v 1.25 2001/11/08 23:34:33 petere Exp $ -->
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/indices.sgml,v 1.26 2001/11/18 00:59:00 tgl Exp $ -->
<chapter id="indexes">
<title id="indexes-title">Indexes</title>
@ -105,7 +105,7 @@ CREATE INDEX test1_id_index ON test1 (id);
<para>
<productname>Postgres</productname> provides several index types:
B-tree, R-tree, and Hash. Each index type is more appropriate for
B-tree, R-tree, GiST, and Hash. Each index type is more appropriate for
a particular query type because of the algorithm it uses.
<indexterm>
<primary>indexes</primary>
@ -235,7 +235,7 @@ CREATE INDEX test2_mm_idx ON test2 (major, minor);
</para>
<para>
Currently, only the B-tree implementation supports multicolumn
Currently, only the B-tree and GiST implementations support multicolumn
indexes. Up to 16 columns may be specified. (This limit can be
altered when building <productname>Postgres</productname>; see the
file <filename>pg_config.h</filename>.)
@ -291,7 +291,7 @@ SELECT name FROM test2 WHERE major = <replaceable>constant</replaceable> OR mino
<synopsis>
CREATE UNIQUE INDEX <replaceable>name</replaceable> ON <replaceable>table</replaceable> (<replaceable>column</replaceable> <optional>, ...</optional>);
</synopsis>
Only B-tree indexes can be declared unique.
Currently, only B-tree indexes can be declared unique.
</para>
<para>