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MySQL-specific Geography Tasks

Description

MySQL examples for creating and dropping tables with geometry columns, inserting location data values, inserting line data values, and inserting polygon data values.

In the samples below, :SRID indicates the optional spatial reference identifier argument. For MySQL, the default is 4326.

Creating and Dropping Tables with Geometry Columns

Creating a table with geometry columns:

CREATE TABLE GeogTest
(
KeyValue	varchar(25)	NOT NULL,
Location	GEOMETRY	NOT NULL,
PRIMARY KEY (KeyValue)) ENGINE = InnoDB

Dropping a table:

DROP TABLE GeogTest

Inserting Location Data Values

Inserting location data using Portable SQL Syntax:

INSERT INTO GeogTest (KeyValue, Location) 
    values('Item1', GeogCreateLocation(-70, 42, :SRID))

Inserting location data using Native syntax:

INSERT INTO GeogTest  (KeyValue, Location) 
    VALUES ('Item1', PointFromText(CONCAT('POINT(', 
    CAST( - 70 as CHAR(32)), ' ', 
    CAST(42 as CHAR(32)), ')'), :SRID))

Inserting Line Data Values

Inserting line data values using Portable SQL Syntax:

INSERT INTO GeogTest (KeyValue, Location) 
    values('Item2', GeogCreateLine(-70, 42, -70, 38, :SRID))

Inserting line data values using Native SQL Syntax:

INSERT INTO GeogTest  (KeyValue, Location) 
    VALUES ('Item2', LineStringFromText(CONCAT('LINESTRING(', 
    CAST( - 70 as CHAR(32)), ' ' , CAST(42 as CHAR(32)), ', ', 
    CAST( - 70 as CHAR(32)), ' ' , CAST(38 as CHAR(32)), ')'),:SRID))

Inserting Polygon Data Values

Inserting polygon values using Portable SQL Syntax:

INSERT INTO GeogTest (KeyValue, Location) 
    values('Item3', GeogCreatePolygon(-70, 42, -70, 32, -60, 
              32, -60, 42, -70, 42, :SRID))

Inserting polygon values using Native SQL Syntax:

INSERT INTO GeogTest  (KeyValue, Location) 
    VALUES ('Item3', PolygonFromText(
    CONCAT('POLYGON((',CAST( - 70 as CHAR(32)), ' ', 
    CAST(42 as CHAR(32)), ', ', CAST( - 70 as CHAR(32)), ' ', 
    CAST(32 as CHAR(32)), ', ', CAST( - 60 as CHAR(32)), ' ', 
    CAST(32 as CHAR(32)), ', ', CAST( - 60 as CHAR(32)), ' ', 
    CAST(42 as CHAR(32)), ', ', CAST( - 70 as CHAR(32)), ' ', 
    CAST(42 as CHAR(32)), '))'),:SRID))

See Also