|  | Argumentos | Izquierdo | Derecho | 
|---|
| !   | int4 |  | int4 | fraction | 
| !!  |  | int4 | int4 | fraction | 
| !!= | int4 | name | bool | not in | 
| !!= | oid | name | bool | not in | 
| !~  | bpchar | text | bool | does not match regex., case-sensitive | 
| !~  | name | text | bool | does not match regex., case-sensitive | 
| !~  | text | text | bool | does not match regex., case-sensitive | 
| !~  | varchar | text | bool | does not match regex., case-sensitive | 
| !~* | bpchar | text | bool | does not match regex., case-insensitive | 
| !~* | name | text | bool | does not match regex., case-insensitive | 
| !~* | text | text | bool | does not match regex., case-insensitive | 
| !~* | varchar | text | bool | does not match regex., case-insensitive | 
| !~~ | bpchar | text | bool | does not match LIKE expression | 
| !~~ | name | text | bool | does not match LIKE expression | 
| !~~ | text | text | bool | does not match LIKE expression | 
| !~~ | varchar | text | bool | does not match LIKE expression | 
| #   |  | path | int4 |  | 
| #   |  | polygon | int4 | number of points in polygon | 
| #   | box | box | box | intersects | 
| #   | line | line | point | intersection point | 
| #   | lseg | lseg | point |  | 
| ##  | line | box | point | closest point to line on box | 
| ##  | line | lseg | point | closest point to line on line segment | 
| ##  | lseg | box | point | closest point to line segment on box | 
| ##  | lseg | line | point | closest point to line segment on line | 
| ##  | lseg | lseg | point | closest point to line segment on line seg | 
| ##  | point | box | point | closest point on box | 
| ##  | point | line | point | closest point on line | 
| ##  | point | lseg | point | closest point on line segment | 
| #<  | tinterval | reltime | bool | length less-than | 
| #<= | tinterval | reltime | bool | length less-than-or-equal | 
| #<> | tinterval | reltime | bool | length not equal to | 
| #=  | tinterval | reltime | bool | length equal | 
| #>  | tinterval | reltime | bool | length greater-than | 
| #>= | tinterval | reltime | bool | length greater-than-or-equal | 
| %  |  | float8 | float8 | truncate to integer | 
| %  | float8 |  | float8 | truncate to integer | 
| %  | int2 | int2 | int2 | modulus | 
| %  | int2 | int4 | int4 | modulus | 
| %  | int4 | int2 | int4 | modulus | 
| %  | int4 | int4 | int4 | modulus | 
| %  | numeric | numeric | numeric | modulus | 
| && | box | box | bool | overlaps | 
| && | circle | circle | bool | overlaps | 
| && | polygon | polygon | bool | overlaps | 
| && | tinterval | tinterval | bool | overlaps | 
| &< | box | box | bool | overlaps, but does not extend to right of | 
| &< | circle | circle | bool | overlaps, but does not extend to right of | 
| &< | polygon | polygon | bool | overlaps, but does not extend to right of | 
| &> | box | box | bool | overlaps, but does not extend to left of | 
| &> | circle | circle | bool |  | 
| &> | polygon | polygon | bool | overlaps, but does not extend to left of | 
| *   | box | point | box | multiply box by point (scale) | 
| *   | char | char | char | multiply | 
| *   | circle | point | circle | multiply | 
| *   | float4 | float4 | float4 | multiply | 
| *   | float4 | float8 | float8 | multiply | 
| *   | float4 | money | money | multiply | 
| *   | float8 | float4 | float8 | multiply | 
| *   | float8 | float8 | float8 | multiply | 
| *   | float8 | money | money | multiply | 
| *   | int2 | int2 | int2 | multiply | 
| *   | int2 | int4 | int4 | multiply | 
| *   | int2 | money | money | multiply | 
| *   | int4 | int2 | int4 | multiply | 
| *   | int4 | int4 | int4 | multiply | 
| *   | int4 | int8 | int8 | multiply | 
| *   | int4 | money | money | multiply | 
| *   | int8 | int4 | int8 | multiply | 
| *   | int8 | int8 | int8 | multiply | 
| *   | money | float4 | money | multiply | 
| *   | money | float8 | money | multiply | 
| *   | money | int2 | money | multiply | 
| *   | money | int4 | money | multiply | 
| *   | numeric | numeric | numeric | multiply | 
| *   | path | point | path | multiply | 
| *   | point | point | point | multiply points (scale/rotate) | 
| +   | _aclitem | aclitem | _aclitem | addition | 
| +   | abstime | reltime | abstime | addition | 
| +   | box | point | box | add point to box (translate) | 
| +   | char | char | char | addition | 
| +   | circle | point | circle | addition | 
| +   | date | int4 | date | addition | 
| +   | datetime | timespan | datetime | plus | 
| +   | float4 | float4 | float4 | addition | 
| +   | float4 | float8 | float8 | addition | 
| +   | float8 | float4 | float8 | addition | 
| +   | float8 | float8 | float8 | addition | 
| +   | int2 | int2 | int2 | addition | 
| +   | int2 | int4 | int4 | addition | 
| +   | int4 | int2 | int4 | addition | 
| +   | int4 | int4 | int4 | addition | 
| +   | int4 | int8 | int8 | addition | 
| +   | int8 | int4 | int8 | addition | 
| +   | int8 | int8 | int8 | addition | 
| +   | money | money | money | addition | 
| +   | numeric | numeric | numeric | addition | 
| +   | path | path | path | addition | 
| +   | path | point | path | addition | 
| +   | point | point | point | add points (translate) | 
| +   | timespan | timespan | timespan | addition | 
| -   |  | float4 | float4 | subtract | 
| -   |  | float8 | float8 | subtract | 
| -   |  | int2 | int2 | subtract | 
| -   |  | int4 | int4 | subtract | 
| -   |  | int8 | int8 | unary minus | 
| -   |  | timespan | timespan | subtract | 
| -   | _aclitem | aclitem | _aclitem | subtract | 
| -   | abstime | reltime | abstime | subtract | 
| -   | box | point | box | subtract point from box (translate) | 
| -   | char | char | char | subtract | 
| -   | circle | point | circle | subtract | 
| -   | date | date | int4 | subtract | 
| -   | date | int4 | date | subtract | 
| -   | datetime | datetime | timespan | subtract | 
| -   | datetime | timespan | datetime | minus | 
| -   | float4 | float4 | float4 | subtract | 
| -   | float4 | float8 | float8 | subtract | 
| -   | float8 | float4 | float8 | subtract | 
| -   | float8 | float8 | float8 | subtract | 
| -   | int2 | int2 | int2 | subtract | 
| -   | int2 | int4 | int4 | subtract | 
| -   | int4 | int2 | int4 | subtract | 
| -   | int4 | int4 | int4 | subtract | 
| -   | int4 | int8 | int8 | subtraction | 
| -   | int8 | int4 | int8 | subtraction | 
| -   | int8 | int8 | int8 | subtraction | 
| -   | money | money | money | subtract | 
| -   | numeric | numeric | numeric | subtract | 
| -   | path | point | path | subtract | 
| -   | point | point | point | subtract points (translate) | 
| -   | timespan | timespan | timespan | subtract | 
| /   | box | point | box | divide box by point (scale) | 
| /   | char | char | char | divide | 
| /   | circle | point | circle | divide | 
| /   | float4 | float4 | float4 | divide | 
| /   | float4 | float8 | float8 | divide | 
| /   | float8 | float4 | float8 | divide | 
| /   | float8 | float8 | float8 | divide | 
| /   | int2 | int2 | int2 | divide | 
| /   | int2 | int4 | int4 | divide | 
| /   | int4 | int2 | int4 | divide | 
| /   | int4 | int4 | int4 | divide | 
| /   | int4 | int8 | int8 | divide | 
| /   | int8 | int4 | int8 | divide | 
| /   | int8 | int8 | int8 | divide | 
| /   | money | float4 | money | divide | 
| /   | money | float8 | money | divide | 
| /   | money | int2 | money | divide | 
| /   | money | int4 | money | divide | 
| /   | numeric | numeric | numeric | divide | 
| /   | path | point | path | divide | 
| /   | point | point | point | divide points (scale/rotate) | 
| /   | timespan | float8 | timespan | divide | 
| :   |  | float8 | float8 | exponential | 
| ;   |  | float8 | float8 | natural logarithm (in psql, protect with | 
| <   | abstime | abstime | bool | less-than | 
| <   | bool | bool | bool | less-than | 
| <   | box | box | bool | less-than | 
| <   | bpchar | bpchar | bool | less-than | 
| <   | char | char | bool | less-than | 
| <   | cidr | cidr | bool | less-than | 
| <   | circle | circle | bool | less-than | 
| <   | date | date | bool | less-than | 
| <   | datetime | datetime | bool | less-than | 
| <   | float4 | float4 | bool | less-than | 
| <   | float4 | float8 | bool | less-than | 
| <   | float8 | float4 | bool | less-than | 
| <   | float8 | float8 | bool | less-than | 
| <   | inet | inet | bool | less-than | 
| <   | int2 | int2 | bool | less-than | 
| <   | int2 | int4 | bool | less-than | 
| <   | int4 | int2 | bool | less-than | 
| <   | int4 | int4 | bool | less-than | 
| <   | int4 | int8 | bool | less-than | 
| <   | int8 | int4 | bool | less-than | 
| <   | int8 | int8 | bool | less-than | 
| <   | lseg | lseg | bool | less-than | 
| <   | macaddr | macaddr | bool | less-than | 
| <   | money | money | bool | less-than | 
| <   | name | name | bool | less-than | 
| <   | numeric | numeric | bool | lower-than | 
| <   | oid | oid | bool | less-than | 
| <   | oid8 | oid8 | bool | less-than | 
| <   | path | path | bool | less-than | 
| <   | reltime | reltime | bool | less-than | 
| <   | text | text | bool | less-than | 
| <   | time | time | bool | less-than | 
| <   | timespan | timespan | bool | less-than | 
| <   | timestamp | timestamp | bool | less-than | 
| <   | tinterval | tinterval | bool | less-than | 
| <   | varchar | varchar | bool | less-than | 
| <#> | abstime | abstime | tinterval | convert to interval | 
| <-> | box | box | float8 | distance between | 
| <-> | circle | circle | float8 | distance between | 
| <-> | circle | polygon | float8 | distance between | 
| <-> | line | box | float8 | distance between | 
| <-> | line | line | float8 | distance between | 
| <-> | lseg | box | float8 | distance between | 
| <-> | lseg | line | float8 | distance between | 
| <-> | lseg | lseg | float8 | distance between | 
| <-> | path | path | float8 | distance between | 
| <-> | point | box | float8 | distance between | 
| <-> | point | circle | float8 | distance between | 
| <-> | point | line | float8 | distance between | 
| <-> | point | lseg | float8 | distance between | 
| <-> | point | path | float8 | distance between | 
| <-> | point | point | float8 | distance between | 
| <-> | polygon | polygon | float8 | distance between | 
| <<  | box | box | bool | is left of | 
| <<  | cidr | cidr | bool | is-subnet | 
| <<  | circle | circle | bool | is left of | 
| <<  | inet | inet | bool | is-subnet | 
| <<  | point | point | bool | is left of | 
| <<  | polygon | polygon | bool | is left of | 
| <<  | tinterval | tinterval | bool | less-than | 
| <<= | cidr | cidr | bool | is-subnet-or-equal | 
| <<= | inet | inet | bool | is-subnet-or-equal | 
| <=  | abstime | abstime | bool | less-than-or-equal | 
| <=  | box | box | bool | less-than-or-equal | 
| <=  | bpchar | bpchar | bool | less-than-or-equal | 
| <=  | char | char | bool | less-than-or-equal | 
| <=  | cidr | cidr | bool | less-than-or-equal | 
| <=  | circle | circle | bool | less-than-or-equal | 
| <=  | date | date | bool | less-than-or-equal | 
| <=  | datetime | datetime | bool | less-than-or-equal | 
| <=  | float4 | float4 | bool | less-than-or-equal | 
| <=  | float4 | float8 | bool | less-than-or-equal | 
| <=  | float8 | float4 | bool | less-than-or-equal | 
| <=  | float8 | float8 | bool | less-than-or-equal | 
| <=  | inet | inet | bool | less-than-or-equal | 
| <=  | int2 | int2 | bool | less-than-or-equal | 
| <=  | int2 | int4 | bool | less-than-or-equal | 
| <=  | int4 | int2 | bool | less-than-or-equal | 
| <=  | int4 | int4 | bool | less-than-or-equal | 
| <=  | int4 | int8 | bool | less-than-or-equal | 
| <=  | int8 | int4 | bool | less-than-or-equal | 
| <=  | int8 | int8 | bool | less-than-or-equal | 
| <=  | lseg | lseg | bool | less-than-or-equal | 
| <=  | macaddr | macaddr | bool | less-than-or-equal | 
| <=  | money | money | bool | less-than-or-equal | 
| <=  | name | name | bool | less-than-or-equal | 
| <=  | numeric | numeric | bool | lower-than-or-equal | 
| <=  | oid | oid | bool | less-than-or-equal | 
| <=  | oid8 | oid8 | bool | less-than-or-equal | 
| <=  | path | path | bool | less-than-or-equal | 
| <=  | reltime | reltime | bool | less-than-or-equal | 
| <=  | text | text | bool | less-than-or-equal | 
| <=  | time | time | bool | less-than-or-equal | 
| <=  | timespan | timespan | bool | less-than-or-equal | 
| <=  | timestamp | timestamp | bool | less-than-or-equal | 
| <=  | tinterval | tinterval | bool | less-than-or-equal | 
| <=  | varchar | varchar | bool | less-than-or-equal | 
| <>  | abstime | abstime | bool | not equal | 
| <>  | bool | bool | bool | not equal | 
| <>  | bpchar | bpchar | bool | not equal | 
| <>  | char | char | bool | not equal | 
| <>  | cidr | cidr | bool | not equal | 
| <>  | circle | circle | bool | not equal | 
| <>  | date | date | bool | not equal | 
| <>  | datetime | datetime | bool | not equal | 
| <>  | float4 | float4 | bool | not equal | 
| <>  | float4 | float8 | bool | not equal | 
| <>  | float8 | float4 | bool | not equal | 
| <>  | float8 | float8 | bool | not equal | 
| <>  | inet | inet | bool | not equal | 
| <>  | int2 | int2 | bool | not equal | 
| <>  | int2 | int4 | bool | not equal | 
| <>  | int4 | int2 | bool | not equal | 
| <>  | int4 | int4 | bool | not equal | 
| <>  | int4 | int8 | bool | not equal | 
| <>  | int8 | int4 | bool | not equal | 
| <>  | int8 | int8 | bool | not equal | 
| <>  | lseg | lseg | bool | not equal | 
| <>  | macaddr | macaddr | bool | not equal | 
| <>  | money | money | bool | not equal | 
| <>  | name | name | bool | not equal | 
| <>  | numeric | numeric | bool | not equal | 
| <>  | oid | oid | bool | not equal | 
| <>  | oid8 | oid8 | bool | less-than | 
| <>  | reltime | reltime | bool | not equal | 
| <>  | text | text | bool | not equal | 
| <>  | time | time | bool | not equal | 
| <>  | timespan | timespan | bool | not equal | 
| <>  | timestamp | timestamp | bool | not equal | 
| <>  | tinterval | tinterval | bool | not equal | 
| <>  | varchar | varchar | bool | not equal | 
| <?> | abstime | tinterval | bool | abstime in tinterval | 
| <^  | box | box | bool | is below | 
| <^  | circle | circle | bool | is below | 
| <^  | point | point | bool | is below | 
| =   | _abstime | _abstime | bool | equal | 
| =   | _aclitem | _aclitem | bool | equal | 
| =   | _bool | _bool | bool | equal | 
| =   | _box | _box | bool | equal | 
| =   | _bytea | _bytea | bool | equal | 
| =   | _char | _char | bool | equal | 
| =   | _cid | _cid | bool | equal | 
| =   | _filename | _filename | bool | equal | 
| =   | _float4 | _float4 | bool | equal | 
| =   | _float8 | _float8 | bool | equal | 
| =   | _int2 | _int2 | bool | equal | 
| =   | _int28 | _int28 | bool | equal | 
| =   | _int4 | _int4 | bool | equal | 
| =   | _lseg | _lseg | bool | equal | 
| =   | _name | _name | bool | equal | 
| =   | _oid | _oid | bool | equal | 
| =   | _oid8 | _oid8 | bool | equal | 
| =   | _path | _path | bool | equal | 
| =   | _point | _point | bool | equal | 
| =   | _polygon | _polygon | bool | equal | 
| =   | _regproc | _regproc | bool | equal | 
| =   | _reltime | _reltime | bool | equal | 
| =   | _text | _text | bool | equal | 
| =   | _tid | _tid | bool | equal | 
| =   | _tinterval | _tinterval | bool | equal | 
| =   | _xid | _xid | bool | equal | 
| =   | abstime | abstime | bool | equal | 
| =   | bool | bool | bool | equal | 
| =   | box | box | bool | equal | 
| =   | bpchar | bpchar | bool | equal | 
| =   | char | char | bool | equal | 
| =   | cidr | cidr | bool | equal | 
| =   | circle | circle | bool | equal | 
| =   | date | date | bool | equal | 
| =   | datetime | datetime | bool | equal | 
| =   | float4 | float4 | bool | equal | 
| =   | float4 | float8 | bool | equal | 
| =   | float8 | float4 | bool | equal | 
| =   | float8 | float8 | bool | equal | 
| =   | inet | inet | bool | equal | 
| =   | int2 | int2 | bool | equal | 
| =   | int2 | int4 | bool | equal | 
| =   | int4 | int2 | bool | equal | 
| =   | int4 | int4 | bool | equal | 
| =   | int4 | int8 | bool | equal | 
| =   | int4 | oid | bool | equal | 
| =   | int8 | int4 | bool | equal | 
| =   | int8 | int8 | bool | equal | 
| =   | line | line | bool | lines equal? | 
| =   | lseg | lseg | bool | equal | 
| =   | macaddr | macaddr | bool | equal | 
| =   | money | money | bool | equal | 
| =   | name | name | bool | equal | 
| =   | numeric | numeric | bool | equal | 
| =   | oid | int4 | bool | equal | 
| =   | oid | oid | bool | equal | 
| =   | oid8 | oid8 | bool | equal | 
| =   | path | path | bool | equal | 
| =   | reltime | reltime | bool | equal | 
| =   | text | text | bool | equal | 
| =   | time | time | bool | equal | 
| =   | timespan | timespan | bool | equal | 
| =   | timestamp | timestamp | bool | equal | 
| =   | tinterval | tinterval | bool | equal | 
| =   | varchar | varchar | bool | equal | 
| >   | abstime | abstime | bool | greater-than | 
| >   | bool | bool | bool | greater-than | 
| >   | box | box | bool | greater-than | 
| >   | bpchar | bpchar | bool | greater-than | 
| >   | char | char | bool | greater-than | 
| >   | cidr | cidr | bool | greater-than | 
| >   | circle | circle | bool | greater-than | 
| >   | date | date | bool | greater-than | 
| >   | datetime | datetime | bool | greater-than | 
| >   | float4 | float4 | bool | greater-than | 
| >   | float4 | float8 | bool | greater-than | 
| >   | float8 | float4 | bool | greater-than | 
| >   | float8 | float8 | bool | greater-than | 
| >   | inet | inet | bool | greater-than | 
| >   | int2 | int2 | bool | greater-than | 
| >   | int2 | int4 | bool | greater-than | 
| >   | int4 | int2 | bool | greater-than | 
| >   | int4 | int4 | bool | greater-than | 
| >   | int4 | int8 | bool | greater-than | 
| >   | int8 | int4 | bool | greater-than | 
| >   | int8 | int8 | bool | greater-than | 
| >   | lseg | lseg | bool | greater-than | 
| >   | macaddr | macaddr | bool | greater-than | 
| >   | money | money | bool | greater-than | 
| >   | name | name | bool | greater-than | 
| >   | numeric | numeric | bool | greater-than | 
| >   | oid | oid | bool | greater-than | 
| >   | oid8 | oid8 | bool | greater-than | 
| >   | path | path | bool | greater-than | 
| >   | reltime | reltime | bool | greater-than | 
| >   | text | text | bool | greater-than | 
| >   | time | time | bool | greater-than | 
| >   | timespan | timespan | bool | greater-than | 
| >   | timestamp | timestamp | bool | greater-than | 
| >   | tinterval | tinterval | bool | greater-than | 
| >   | varchar | varchar | bool | greater-than | 
| >=  | abstime | abstime | bool | greater-than-or-equal | 
| >=  | box | box | bool | greater-than-or-equal | 
| >=  | bpchar | bpchar | bool | greater-than-or-equal | 
| >=  | char | char | bool | greater-than-or-equal | 
| >=  | cidr | cidr | bool | greater-than-or-equal | 
| >=  | circle | circle | bool | greater-than-or-equal | 
| >=  | date | date | bool | greater-than-or-equal | 
| >=  | datetime | datetime | bool | greater-than-or-equal | 
| >=  | float4 | float4 | bool | greater-than-or-equal | 
| >=  | float4 | float8 | bool | greater-than-or-equal | 
| >=  | float8 | float4 | bool | greater-than-or-equal | 
| >=  | float8 | float8 | bool | greater-than-or-equal | 
| >=  | inet | inet | bool | greater-than-or-equal | 
| >=  | int2 | int2 | bool | greater-than-or-equal | 
| >=  | int2 | int4 | bool | greater-than-or-equal | 
| >=  | int4 | int2 | bool | greater-than-or-equal | 
| >=  | int4 | int4 | bool | greater-than-or-equal | 
| >=  | int4 | int8 | bool | greater-than-or-equal | 
| >=  | int8 | int4 | bool | greater-than-or-equal | 
| >=  | int8 | int8 | bool | greater-than-or-equal | 
| >=  | lseg | lseg | bool | greater-than-or-equal | 
| >=  | macaddr | macaddr | bool | greater-than-or-equal | 
| >=  | money | money | bool | greater-than-or-equal | 
| >=  | name | name | bool | greater-than-or-equal | 
| >=  | numeric | numeric | bool | greater-than-or-equal | 
| >=  | oid | oid | bool | greater-than-or-equal | 
| >=  | oid8 | oid8 | bool | greater-than-or-equal | 
| >=  | path | path | bool | greater-than-or-equal | 
| >=  | reltime | reltime | bool | greater-than-or-equal | 
| >=  | text | text | bool | greater-than-or-equal | 
| >=  | time | time | bool | greater-than-or-equal | 
| >=  | timespan | timespan | bool | greater-than-or-equal | 
| >=  | timestamp | timestamp | bool | greater-than-or-equal | 
| >=  | tinterval | tinterval | bool | greater-than-or-equal | 
| >=  | varchar | varchar | bool | greater-than-or-equal | 
| >>  | box | box | bool | is left of | 
| >>  | cidr | cidr | bool | is-supernet | 
| >>  | circle | circle | bool | is left of | 
| >>  | inet | inet | bool | is-supernet | 
| >>  | point | point | bool | is left of | 
| >>  | polygon | polygon | bool | is left of | 
| >>= | cidr | cidr | bool | is-supernet-or-equal | 
| >>= | inet | inet | bool | is-supernet-or-equal | 
| >^  | box | box | bool | is above | 
| >^  | circle | circle | bool | is above | 
| >^  | point | point | bool | is above | 
| ?#  | box | box | bool | overlaps | 
| ?#  | line | box | bool |  | 
| ?#  | line | line | bool | lines intersect? | 
| ?#  | lseg | box | bool |  | 
| ?#  | lseg | line | bool |  | 
| ?#  | lseg | lseg | bool | intersects | 
| ?#  | path | path | bool |  | 
| ?-  |  | line | bool | lines horizontal? | 
| ?-  |  | lseg | bool | is horizontal | 
| ?-  | point | point | bool | is horizontal | 
| ?-| | line | line | bool | lines perpendicular? | 
| ?-| | lseg | lseg | bool | is perpendicular to | 
| ?|  |  | line | bool | lines vertical? | 
| ?|  |  | lseg | bool | is vertical | 
| ?|  | point | point | bool | is vertical | 
| ?|| | line | line | bool | lines parallel? | 
| ?|| | lseg | lseg | bool | is parallel to | 
| @   |  | float4 | float4 | absolute value | 
| @   |  | float8 | float8 | absolute value | 
| @   |  | numeric | numeric | absolute value | 
| @   | box | box | bool | contained in | 
| @   | circle | circle | bool |  | 
| @   | lseg | box | bool | contained in | 
| @   | lseg | line | bool | contained in | 
| @   | point | box | bool | point is inside | 
| @   | point | circle | bool |  | 
| @   | point | line | bool | contained in | 
| @   | point | lseg | bool | contained in | 
| @   | point | path | bool | contained in | 
| @   | point | polygon | bool | point contained by polygon? | 
| @   | polygon | polygon | bool | contained in | 
| @-@ |  | lseg | float8 | distance between endpoints | 
| @-@ |  | path | float8 | sum of path segments | 
| @@  |  | box | point | center of | 
| @@  |  | circle | point | center of | 
| @@  |  | lseg | point | center of | 
| @@  |  | path | point | center of | 
| @@  |  | polygon | point | center of | 
| ^   | float8 | float8 | float8 | exponentiation | 
| |   |  | tinterval | abstime | start of interval | 
| |/  |  | float8 | float8 | square root | 
| ||  | bpchar | bpchar | text | concatenate | 
| ||  | text | text | text | concatenate | 
| ||  | varchar | varchar | text | concatenate | 
| ||/ |  | float8 | float8 | cube root | 
| ~   | _aclitem | aclitem | bool | matches regex., case-sensitive | 
| ~   | box | box | bool | contains | 
| ~   | bpchar | text | bool | matches regex., case-sensitive | 
| ~   | circle | circle | bool | contains | 
| ~   | circle | point | bool |  | 
| ~   | name | text | bool | matches regex., case-sensitive | 
| ~   | path | point | bool | path contains point? | 
| ~   | polygon | point | bool | polygon contains point? | 
| ~   | polygon | polygon | bool | contains | 
| ~   | text | text | bool | matches regex., case-sensitive | 
| ~   | varchar | text | bool | matches regex., case-sensitive | 
| ~*  | bpchar | text | bool | matches regex., case-insensitive | 
| ~*  | name | text | bool | matches regex., case-insensitive | 
| ~*  | text | text | bool | matches regex., case-insensitive | 
| ~*  | varchar | text | bool | matches regex., case-insensitive | 
| ~=  | box | box | bool | same as | 
| ~=  | circle | circle | bool | same as | 
| ~=  | point | point | bool | same as | 
| ~=  | polygon | polygon | bool | same as | 
| ~=  | tinterval | tinterval | bool | same as | 
| ~~  | bpchar | text | bool | matches LIKE expression | 
| ~~  | name | text | bool | matches LIKE expression | 
| ~~  | text | text | bool | matches LIKE expression | 
| ~~  | varchar | text | bool | matches LIKE expression | 
|  |  |  |  |  | 
|---|