11.17.4.5. Fetching Spatial Data

Geometry values stored in a table can be fetched in internal format. You can also convert them into WKT or WKB format.

  • Fetching spatial data in internal format:

    Fetching geometry values using internal format can be useful in table-to-table transfers:

    CREATE TABLE geom2 (g GEOMETRY) SELECT g FROM geom;
    
  • Fetching spatial data in WKT format:

    The AsText() function converts a geometry from internal format into a WKT string.

    SELECT AsText(g) FROM geom;
    
  • Fetching spatial data in WKB format:

    The AsBinary() function converts a geometry from internal format into a BLOB containing the WKB value.

    SELECT AsBinary(g) FROM geom;
    
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