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 | 
|---|---|---|
| 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.