Mega Code Archive
Find the most westerly and easterly points
<![CDATA[
mysql>
mysql>
mysql>
mysql>
mysql> CREATE TABLE mytable (
-> id INT NOT NULL PRIMARY KEY,
-> border POLYGON NOT NULL,
-> ela LINESTRING NOT NULL,
-> ref POINT NOT NULL,
-> name VARCHAR(20),
-> SPATIAL KEY(border),
-> SPATIAL KEY(ela),
-> SPATIAL KEY(ref) );
Query OK, 0 rows affected (0.00 sec)
mysql>
mysql>
mysql> INSERT INTO mytable VALUES ( 1,
-> GEOMFROMTEXT('POLYGON(
'> (25 15,10 25,25 35,30 50,30 60,
'> 35 65,40 55,45 30,55 20,25 15),
'> (3395 2827,3861 2840,4094 2374,3395 2594,3395 2827)
'> )'),
-> GEOMFROMTEXT('LINESTRING(25 35, 45 30)'),
-> GEOMFROMTEXT('POINT(2850 2350)'), 'gl_1');
Query OK, 1 row affected (0.00 sec)
mysql>
mysql>
mysql> INSERT INTO mytable VALUES ( 2,
-> GEOMFROMTEXT('POLYGON((70 20,55 20,65 30,
'> 65 50,70 55,80 50,85 40,80 30,
'> 85 25,70 20))'),
-> GEOMFROMTEXT('LINESTRING(65 35, 80 30)'),
-> GEOMFROMTEXT('POINT(7250 2750)'), 'gl_2');
Query OK, 1 row affected (0.00 sec)
mysql>
mysql>
mysql>
mysql>
mysql> SELECT MIN(X(ref)), MAX(X(ref)) FROM mytable;
+-------------+-------------+
| MIN(X(ref)) | MAX(X(ref)) |
+-------------+-------------+
| 2850 | 7250 |
+-------------+-------------+
1 row in set (0.00 sec)
mysql>
mysql> drop table mytable;
Query OK, 0 rows affected (0.00 sec)
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