ST_MultiSurfaceAggr( ST_Surface ) method

Syntax

ST_MultiSurface::ST_MultiSurfaceAggr( ST_Surface geometry_column)

Parameters

• geometry_column – The geometry values to generate the collection. Typically this is a column.

Returns

ST_MultiSurface Returns a multisurface that contains all of the geometries in a group.

Examples

• Example 1 – The following example returns a single value which combines all geometries of type ST_Surface from the SpatialShapes table into a single collection of type ST_MultiSurface. If the Shape column was of type ST_Surface then the TREAT function and WHERE clause would not be necessary.

  SELECT ST_MultiSurface::ST_MultiSurfaceAggr( TREAT( Shape AS ST_Surface ) )
  FROM SpatialShapes WHERE Shape IS OF( ST_Surface )

Standards

SQL/MM (ISO/IEC 13249-3: 2006) Vendor extension