Mega Code Archive
Using the POLYGON object in the variable
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mysql>
mysql> CREATE TABLE cities (
-> id int(11) ,
-> pt point NOT NULL default '',
-> zip int(11) default NULL,
-> country varchar(10) default NULL,
-> state char(2) default NULL,
-> city varchar(100) default NULL,
-> district varchar(100) default NULL
-> );
Query OK, 0 rows affected, 1 warning (0.01 sec)
mysql>
mysql>
mysql>
mysql> SET @d0 = 30000;
Query OK, 0 rows affected (0.00 sec)
mysql> SET @str = CONCAT('MULTIPOINT(', @x0-@d0, ' ', @y0-@d0, ', ',@x0+@d0, ' ', @y0+@d0, ')');
Query OK, 0 rows affected (0.00 sec)
mysql> SET @bbox = ENVELOPE(GEOMFROMTEXT(@str));
Query OK, 0 rows affected (0.00 sec)
mysql> SELECT @str;
+------+
| @str |
+------+
| NULL |
+------+
1 row in set (0.00 sec)
mysql>
mysql>
mysql> SELECT city, X(pt), Y(pt) FROM cities WHERE MBRCONTAINS(@bbox, pt);
Empty set (0.00 sec)
mysql>
mysql> drop table cities;
Query OK, 0 rows affected (0.00 sec)
mysql>
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