Returns the geometry which is the topological union of the specified geometric objects. Using Oracle Retorna la geometría que es la unión topologica de los objetos geométricos especificados. Usando Oracle, must be taken into account that the value of tolerance can affect the topology of the obtained geometry.

1 geo.aggrUnion

<geo.aggrUnion
    ora_isline='y|n'
    ora_tol='ora_tol'
    pg_collect='y'
>
    <geometry_column /> *
</geo.aggrUnion>

Attributes
Name	Type	Required	Default	Description
Aora_isline	string			n	Allows to specify that the input topology are lines. It is only used in oracle and it serves to use a more efficient function.
Aora_tol	decimal			0.05	Tolerance. It is only used in oracle.
Apg_collect	string			n	It serves to indicate that in Postgres must be used the ST_Collect function instead of ST_Union.

Arguments
Name	Type	Required	Unique	Nullable	Description
Egeometry_column	geometry

Example

Copy

<select>
    <columns>
       <geo.aggrUnion pg_collect='y'>a.type, a.geometry_col</geo.aggrUnion>
    </columns>
    <from table='buildings' alias='a' >
    </from>
    <group>a.type</group>
</select>