ST_Buffer() ST_Buffer_Strategy() ST_Centroid() ST_Collect( ST_Collect() ST_Contains() ST_ConvexHull() ST_Crosses() ST_Difference() ST_Dimension() ST_Disjoint() ST_Distance() ST_Distance_Sphere() ST_EndPoint() ST_Envelope() 5708 Section 12.17.8, “Spatial Operator Functions” Section 5.1.8, “Server System Variables” Section 12.17.8, “Spatial Operator Functions” Section 12.17.7.4, “Polygon and MultiPolygon Property Functions” Section 12.17.12, “Spatial Aggregate Functions” Section 12.17.12, “Spatial Aggregate Functions” Section 12.17.9.1, “Spatial Relation Functions That Use Object Shapes” Section 12.17.8, “Spatial Operator Functions” Section 12.17.9.1, “Spatial Relation Functions That Use Object Shapes” Section 12.17.8, “Spatial Operator Functions” Section 12.17.7.1, “General Geometry Property Functions” Section 12.17.9.1, “Spatial Relation Functions That Use Object Shapes” Section 12.17.13, “Spatial Convenience Functions” Section 12.17.9.1, “Spatial Relation Functions That Use Object Shapes” Section 26.3.37, “The INFORMATION_SCHEMA ST_UNITS_OF_MEASURE Table” Section 12.17.13, “Spatial Convenience Functions” Section 12.17.9.1, “Spatial Relation Functions That Use Object Shapes” Section 12.17.7.3, “LineString and MultiLineString Property Functions” Section 12.17.8, “Spatial Operator Functions” Section 12.17.7.1, “General Geometry Property Functions” Section 12.17.8, “Spatial Operator Functions”