65.2. Built-in Operator Classes
The core PostgreSQL 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.
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https://www.postgresql.org/docs/13/spgist-builtin-opclasses.html