DropGeometryColumn — 从空间表中删除几何图形列。
text DropGeometryColumn(
varchar table_name, varchar column_name)
;
text DropGeometryColumn(
varchar schema_name, varchar table_name, varchar column_name)
;
text DropGeometryColumn(
varchar catalog_name, varchar schema_name, varchar table_name, varchar column_name)
;
从空间表中删除几何图形列。请注意,SCHEMA_NAME需要与GEOMETRY_COLUMNS表中表行的f_TABLE_SCHEMA字段匹配。
This method implements the OGC Simple Features Implementation Specification for SQL 1.1.
This function supports 3d and will not drop the z-index.
This method supports Circular Strings and Curves
已更改:2.0.0提供此函数是为了向后兼容。既然GEOMETRY_COLUMNS现在是系统编目的视图,您就可以像删除任何其他表列一样使用 |
SELECT DropGeometryColumn ('my_schema','my_spatial_table','geom'); ----RESULT output --- dropgeometrycolumn ------------------------------------------------------ my_schema.my_spatial_table.geom effectively removed. -- In PostGIS 2.0+ the above is also equivalent to the standard -- the standard alter table. Both will deregister from geometry_columns ALTER TABLE my_schema.my_spatial_table DROP column geom;