MySQL 5.6 Reference Manual Including MySQL NDB Cluster 7.3-7.4 Reference Guide
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 AsText()
function
converts a geometry from internal format to a WKT string.
SELECT AsText(g) FROM geom;
Fetching spatial data in WKB format:
The AsBinary()
function
converts a geometry from internal format to a
BLOB
containing the WKB
value.
SELECT AsBinary(g) FROM geom;