The core LightDB distribution includes the SP-GiST operator classes shown in Table 65.1.
Table 65.1. Built-in SP-GiST Operator Classes
| Name | Indexed Data Type | Indexable Operators | Ordering Operators |
|---|---|---|---|
kd_point_ops | point |
<<
<@
<^
>>
>^
~=
|
<->
|
quad_point_ops | point |
<<
<@
<^
>>
>^
~=
|
<->
|
range_ops | any range type |
&&
&<
&>
-|-
<<
<@
=
>>
@>
| |
box_ops | box |
<<
&<
&&
&>
>>
~=
@>
<@
&<|
<<|
|>>
|&>
|
<->
|
poly_ops | polygon |
<<
&<
&&
&>
>>
~=
@>
<@
&<|
<<|
|>>
|&>
|
<->
|
text_ops | text |
<
<=
=
>
>=
~<=~
~<~
~>=~
~>~
^@
| |
inet_ops | inet, cidr |
&&
>>
>>=
>
>=
<>
<<
<<=
<
<=
=
|
Of the two operator classes for type point,
quad_point_ops is the default. kd_point_ops
supports the same operators but uses a different index data structure that
may offer better performance in some applications.
The quad_point_ops, kd_point_ops and
poly_ops operator classes support the <->
ordering operator, which enables the k-nearest neighbor (k-NN)
search over indexed point or polygon data sets.