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| |
| # ST_Dimension |
| |
| Introduction: Return the topological dimension of this Geometry object, which must be less than or equal to the coordinate dimension. OGC SPEC s2.1.1.1 - returns 0 for POINT, 1 for LINESTRING, 2 for POLYGON, and the largest dimension of the components of a GEOMETRYCOLLECTION. If the dimension is unknown (e.g. for an empty GEOMETRYCOLLECTION) 0 is returned. |
| |
|  |
| |
| Format: `ST_Dimension (A: Geometry) | ST_Dimension (C: Geometrycollection)` |
| |
| Return type: `Integer` |
| |
| Since: `v1.5.0` |
| |
| SQL Example |
| |
| ```sql |
| SELECT ST_Dimension('GEOMETRYCOLLECTION(LINESTRING(1 1,0 0),POINT(0 0))'); |
| ``` |
| |
| Output: |
| |
| ``` |
| 1 |
| ``` |
