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NAME="SPGIST-BUILTIN-OPCLASSES"
>57.2. Built-in Operator Classes</A
></H1
><P
> The core <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> distribution
includes the <ACRONYM
CLASS="ACRONYM"
>SP-GiST</ACRONYM
> operator classes shown in
<A
HREF="spgist-builtin-opclasses.html#SPGIST-BUILTIN-OPCLASSES-TABLE"
>Table 57-1</A
>.
</P
><DIV
CLASS="TABLE"
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NAME="SPGIST-BUILTIN-OPCLASSES-TABLE"
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><P
><B
>Table 57-1. Built-in <ACRONYM
CLASS="ACRONYM"
>SP-GiST</ACRONYM
> Operator Classes</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><COL><THEAD
><TR
><TH
>Name</TH
><TH
>Indexed Data Type</TH
><TH
>Indexable Operators</TH
></TR
></THEAD
><TBODY
><TR
><TD
><TT
CLASS="LITERAL"
>kd_point_ops</TT
></TD
><TD
><TT
CLASS="TYPE"
>point</TT
></TD
><TD
> <TT
CLASS="LITERAL"
><<</TT
>
<TT
CLASS="LITERAL"
><@</TT
>
<TT
CLASS="LITERAL"
><^</TT
>
<TT
CLASS="LITERAL"
>>></TT
>
<TT
CLASS="LITERAL"
>>^</TT
>
<TT
CLASS="LITERAL"
>~=</TT
>
</TD
></TR
><TR
><TD
><TT
CLASS="LITERAL"
>quad_point_ops</TT
></TD
><TD
><TT
CLASS="TYPE"
>point</TT
></TD
><TD
> <TT
CLASS="LITERAL"
><<</TT
>
<TT
CLASS="LITERAL"
><@</TT
>
<TT
CLASS="LITERAL"
><^</TT
>
<TT
CLASS="LITERAL"
>>></TT
>
<TT
CLASS="LITERAL"
>>^</TT
>
<TT
CLASS="LITERAL"
>~=</TT
>
</TD
></TR
><TR
><TD
><TT
CLASS="LITERAL"
>range_ops</TT
></TD
><TD
>any range type</TD
><TD
> <TT
CLASS="LITERAL"
>&&</TT
>
<TT
CLASS="LITERAL"
>&<</TT
>
<TT
CLASS="LITERAL"
>&></TT
>
<TT
CLASS="LITERAL"
>-|-</TT
>
<TT
CLASS="LITERAL"
><<</TT
>
<TT
CLASS="LITERAL"
><@</TT
>
<TT
CLASS="LITERAL"
>=</TT
>
<TT
CLASS="LITERAL"
>>></TT
>
<TT
CLASS="LITERAL"
>@></TT
>
</TD
></TR
><TR
><TD
><TT
CLASS="LITERAL"
>text_ops</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
> <TT
CLASS="LITERAL"
><</TT
>
<TT
CLASS="LITERAL"
><=</TT
>
<TT
CLASS="LITERAL"
>=</TT
>
<TT
CLASS="LITERAL"
>></TT
>
<TT
CLASS="LITERAL"
>>=</TT
>
<TT
CLASS="LITERAL"
>~<=~</TT
>
<TT
CLASS="LITERAL"
>~<~</TT
>
<TT
CLASS="LITERAL"
>~>=~</TT
>
<TT
CLASS="LITERAL"
>~>~</TT
>
</TD
></TR
></TBODY
></TABLE
></DIV
><P
> Of the two operator classes for type <TT
CLASS="TYPE"
>point</TT
>,
<TT
CLASS="LITERAL"
>quad_point_ops</TT
> is the default. <TT
CLASS="LITERAL"
>kd_point_ops</TT
>
supports the same operators but uses a different index data structure which
may offer better performance in some applications.
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