57.2. Built-in Operator Classes
The core PostgreSQL distribution includes the SP-GiST operator classes shown in Table 57-1.
Table 57-1. Built-in SP-GiST Operator Classes
| Name | Indexed Data Type | Indexable Operators |
|---|---|---|
kd_point_ops | point |
<< <@ <^ >> >^ ~=
|
quad_point_ops | point |
<< <@ <^ >> >^ ~=
|
range_ops | any range type |
&& &< &> -|- << <@ = >> @>
|
text_ops | text |
< <= = > >= ~<=~ ~<~ ~>=~ ~>~
|
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.
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https://www.postgresql.org/docs/9.4/spgist-builtin-opclasses.html