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MySQL 5.7 Reference Manual
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MySQL 5.7 Reference Manual  /  ...  /  Fetching Spatial Data

12.5.3.4 Fetching Spatial Data

Geometry values stored in a table can be fetched in internal format. You can also convert them to 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 ST_AsText() function converts a geometry from internal format to a WKT string.

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

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

    SELECT ST_AsBinary(g) FROM geom;
    

User Comments
  Posted by Alberto M. on June 28, 2006
A little but basic note: at the end of SELECT put a LIMIT. Without it nothing seems to work.
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