函数说明
返回几何点的x 位置。
返回值类型:DOUBLE。
示例:
gbase> SELECT GB_X(GB_GeometryFromChar('POINT (5 4)')) from dual;
+------------------------------------------+
| GB_X(GB_GeometryFromChar('POINT (5 4)')) |
+------------------------------------------+
|
5
|
+------------------------------------------+
1 row in set