PostgreSQL

65.2. Built-in Operator Classes
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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

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`	`&&` `>>` `>>=` `>` `>=` `<>` `<<` `<<=` `<` `<=` `=`

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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