DropGeometryColumn
Anterior  7.2. Funções de Gestão  Próxima

Nome

DropGeometryColumn — Remove uma coluna geometria de uma spatial table.

Sinopse

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);

Descrição

Remove uma coluna geometria de uma table espacial. Note que o schema_name precisará combinar com o campo f_table_schema da fila da table na table geometry_columns.

[Atenção]

DropGeometryColumn is retained for backward compatibility and is not recommended for new applications. Use the standard ALTER TABLE ... DROP COLUMN command instead. The geometry_columns view updates automatically from the system catalogs.

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.

Changed: 2.0.0. Retained for backward compatibility after geometry_columns became a view of the system catalogs.

Exemplos

Use standard SQL to drop the geometry column. The geometry_columns view updates automatically.

Code
ALTER TABLE my_schema.my_spatial_table DROP COLUMN geom;

The legacy compatibility function performs the equivalent operation.

Code
SELECT DropGeometryColumn ('my_schema', 'my_spatial_table', 'geom');
Raster Outputs
my_schema.my_spatial_table.geom effectively removed.