PostgreSQL

69.2. Built-in Operator Classes
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69.2. Built-in Operator Classes #

The core PostgreSQL distribution includes the SP-GiST operator classes shown in Table 69.1.

Table 69.1. Built-in SP-GiST Operator Classes

Name Indexable Operators Ordering Operators

box_ops

<< (box,box)

<-> (box,point)

&< (box,box)

&> (box,box)

>> (box,box)

<@ (box,box)

@> (box,box)

~= (box,box)

&& (box,box)

`+<<

(box,box)+`

`+&<

(box,box)+`

&> (box,box)+`

>> (box,box)+`

inet_ops

<< (inet,inet)

<<= (inet,inet)

>> (inet,inet)

>>= (inet,inet)

= (inet,inet)

<> (inet,inet)

< (inet,inet)

<= (inet,inet)

> (inet,inet)

>= (inet,inet)

&& (inet,inet)

kd_point_ops

>> (point,point)+`

<-> (point,point)

<< (point,point)

>> (point,point)

`+<<

(point,point)+`

~= (point,point)

<@ (point,box)

poly_ops

<< (polygon,polygon)

<-> (polygon,point)

&< (polygon,polygon)

&> (polygon,polygon)

>> (polygon,polygon)

<@ (polygon,polygon)

@> (polygon,polygon)

~= (polygon,polygon)

&& (polygon,polygon)

`+<<

(polygon,polygon)+`

`+&<

(polygon,polygon)+`

>> (polygon,polygon)+`

&> (polygon,polygon)+`

quad_point_ops

>> (point,point)+`

<-> (point,point)

<< (point,point)

>> (point,point)

`+<<

(point,point)+`

~= (point,point)

<@ (point,box)

range_ops

= (anyrange,anyrange)

&& (anyrange,anyrange)

@> (anyrange,anyelement)

@> (anyrange,anyrange)

<@ (anyrange,anyrange)

<< (anyrange,anyrange)

>> (anyrange,anyrange)

&< (anyrange,anyrange)

&> (anyrange,anyrange)

`+-

- (anyrange,anyrange)+`

text_ops

= (text,text)

< (text,text)

<= (text,text)

> (text,text)

>= (text,text)

~<~ (text,text)

~<=~ (text,text)

~>=~ (text,text)

~>~ (text,text)

^@ (text,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.

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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