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| |
| # ST_Contains |
| |
| Introduction: Return true if geography A fully contains geography B. |
| |
|  |
| |
| Format: |
| |
| `ST_Contains (geogA: Geography, geogB: Geography)` |
| |
| Return type: `Boolean` |
| |
| Since: `v1.9.1` |
| |
| Polygon ring roles follow the simple-features structure: the first ring is a shell and subsequent rings are holes, regardless of input winding. Sedona preserves the submitted coordinate order for structural output such as `ST_AsText`, while normalizing only the S2-facing traversal used by spherical operations. |
| |
| Each Geography polygon shell is normalized to an area of at most one hemisphere. A shell intended to represent more than half the sphere is therefore interpreted as its complement; reversing the ring's coordinate sequence does not select the larger region. |
| |
| SQL Example: |
| |
| ```sql |
| SELECT ST_Contains(ST_GeogFromWKT('POLYGON ((0 0, 2 0, 2 2, 0 2, 0 0))', 4326), ST_GeogFromWKT('POINT (1 1)', 4326)) |
| ``` |
| |
| Output: |
| |
| ``` |
| true |
| ``` |
