These operators test whether the bounding boxes of their arguments satisfy the predicate and result in a Boolean value. As stated in Chapter 3, *Temporal Types*, the bounding box associated to a temporal type depends on the base type: It is the `period`

type for the `tbool`

and `ttext`

types, the `tbox`

type for the `tint`

and `tfloat`

types, and the `stbox`

type for the `tgeompoint`

and `tgeogpoint`

types. Furthermore, as seen in the section called “Casting”, many PostgreSQL, PostGIS, or MobilityDB types can be cast to the `tbox`

and `stbox`

types. For example, numeric and range types can be casted to type `tbox`

, types `geometry`

and `geography`

can be casted to type `stbox`

, and time types and temporal types can be casted to types `tbox`

and `stbox`

.

A first set of operators consider the topological relationships between the bounding boxes. There are five topological operators: overlaps (`&&`

), contains (`@>`

), contained (`<@`

), same (`~=`

), and adjacent (`-|-`

). The arguments of these operators can be a base type, a box, or a temporal type and the operators verify the topological relationship taking into account the value and/or the time dimension depending on the type of the arguments.

Another set of operators consider the relative position of the bounding boxes. The operators `<<`

, `>>`

, `&<`

, and `&>`

consider the value dimension for `tint`

and `tfloat`

types and the X coordinates for the `tgeompoint`

and `tgeogpoint`

types, the operators `<<|`

, `|>>`

, `&<|`

, and `|&>`

consider the Y coordinates for the `tgeompoint`

and `tgeogpoint`

types, the operators `<</`

, `/>>`

, `&</`

, and `/&>`

consider the Z coordinates for the `tgeompoint`

and `tgeogpoint`

types, and the operators `<<#`

, `#>>`

, `#&<`

, and `#&>`

consider the time dimension for all temporal types.

We refer to the section called “Topological Operators” and the section called “Relative Position Operators” for the bounding box operators.