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.

Finally, it is worth noting that the bounding box operators allow to mix 2D/3D geometries but in that case, the computation is only performed on 2D.

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