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Rechercher dans le manuel MySQL
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https://dev.mysql.com/gis-data-formats.html
Examples of WKT representations of geometry objects: A Point: POINT(15 20) The point coordinates are specified with no separating comma. This differs from the syntax for the SQL Point() function, which requires a comma between the coordinates. For ... Two standard spatial data formats are used to represent geometry objects in queries: Well-Known Text (WKT) format Well-Known Binary (WKB) format Internally, MySQL stores geometry values in a format that is not identical to either WKT or WKB ...
https://dev.mysql.com/spatial-convenience-functions.html
These convenience functions are available: ST_Distance_Sphere(g1, g2 [, radius]) Returns the mimimum spherical distance between Point or MultiPoint arguments on a sphere, in meters. If both geometry parameters are valid Cartesian Point or MultiPoint ... The functions in this section provide convenience operations on geometry ...
https://dev.mysql.com/func-op-summary-ref.html
GTID_SUBTRACT() Return all GTIDs in set that are not in subset. JSON_CONTAINS() Whether JSON document contains specific object at path JSON_CONTAINS_PATH() Whether JSON document contains any data at path JSON_DEPTH() Maximum depth of JSON document ...
https://dev.mysql.com/replication-features-floatvalues.html
Because conversions between decimal and binary representations of them may be approximate, comparisons involving floating-point values are inexact. This is true for operations that use floating-point values explicitly, or that use values that are ...
https://dev.mysql.com/spatial-function-reference.html
The following table lists each spatial function and provides a short description of each one.
https://dev.mysql.com/glossary.html
adaptive flushing An algorithm for InnoDB tables that smooths out the I/O overhead introduced by checkpoints. See Also buffer pool, checkpoint, data files, flush, InnoDB, page, redo log. InnoDB does not use the beta designation, preferring an early ... These terms are commonly used in information about the MySQL database ...
https://dev.mysql.com/server-error-reference.html
There is a chance that your master is inconsistent at this point. Error number: 3042; Symbol: ER_BOOST_GEOMETRY_SELF_INTERSECTION_POINT_EXCEPTION; SQLSTATE: HY000 Message: Analysis procedures of intersection points interrupted unexpectedly in ...
https://dev.mysql.com/spatial-relation-functions-object-shapes.html
ST_Crosses(g1, g2) Two geometries spatially cross if their spatial relation has the following properties: Unless g1 and g2 are both of dimension 1: g1 crosses g2 if the interior of g2 has points in common with the interior of g1, but g2 does not ...
https://dev.mysql.com/type-conversion.html
The arguments are compared as decimal values if the other argument is a decimal or integer value, or as floating-point values if the other argument is a floating-point value. In all other cases, the arguments are compared as floating-point (real) ...
https://dev.mysql.com/gis-linestring-property-functions.html
You can extract particular points of a LineString, count the number of points that it contains, or obtain its length. These functions are available for obtaining linestring properties: ST_EndPoint(ls) Returns the Point that is the endpoint of the ...
Document created the 26/06/2006, last modified the 26/10/2018
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