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Mention in docs that you can create SP-GiST indexes on range types.

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This is new in 9.3devel.
This commit is contained in:
Heikki Linnakangas 2013-04-22 21:51:14 +03:00
parent 4f8799a948
commit ae7363999f
1 changed files with 6 additions and 6 deletions
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12
doc/src/sgml/rangetypes.sgml
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@ -371,9 +371,9 @@ SELECT '[1.234, 5.678]'::floatrange;
</para>
<para>
In addition, any range type that is meant to be used with GiST indexes
In addition, any range type that is meant to be used with GiST or SP-GiST indexes
should define a subtype difference, or <literal>subtype_diff</>, function.
(A GiST index will still work without <literal>subtype_diff</>, but it is
(the index will still work without <literal>subtype_diff</>, but it is
likely to be considerably less efficient than if a difference function is
provided.) The subtype difference function takes two input values of the
subtype, and returns their difference (i.e., <replaceable>X</> minus
@ -394,7 +394,7 @@ SELECT '[1.234, 5.678]'::floatrange;
</para>
</sect2>
<sect2 id="rangetypes-gist">
<sect2 id="rangetypes-indexing">
<title>Indexing</title>
<indexterm>
@ -403,12 +403,12 @@ SELECT '[1.234, 5.678]'::floatrange;
</indexterm>
<para>
GiST indexes can be created for table columns of range types.
For instance:
GiST and SP-GiST indexes can be created for table columns of range types.
For instance, to create a GiST index:
<programlisting>
CREATE INDEX reservation_idx ON reservation USING gist (during);
</programlisting>
A GiST index can accelerate queries involving these range operators:
A GiST or SP-GiST index can accelerate queries involving these range operators:
<literal>=</>,
<literal>&amp;&amp;</>,
<literal>&lt;@</>,