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| |
| # ST_IsValidDetail |
| |
| Introduction: Returns a row, containing a boolean `valid` stating if a geometry is valid, a string `reason` stating why it is invalid and a geometry `location` pointing out where it is invalid. |
| |
| This function is a combination of [ST_IsValid](ST_IsValid.md) and [ST_IsValidReason](ST_IsValidReason.md). |
| |
| The flags parameter is a bitfield with the following options: |
| |
| - 0 (default): Use usual OGC SFS (Simple Features Specification) validity semantics. |
| - 1: "ESRI flag", Accepts certain self-touching rings as valid, which are considered invalid under OGC standards. |
| |
|  |
| |
| Formats: |
| |
| ```sql |
| ST_IsValidDetail(geom: Geometry) |
| ``` |
| |
| ```sql |
| ST_IsValidDetail(geom: Geometry, flag: Integer) |
| ``` |
| |
| Return type: `Struct<valid: Boolean, reason: String, location: Geometry>` |
| |
| Since: `v1.6.1` |
| |
| SQL Example: |
| |
| ```sql |
| SELECT ST_IsValidDetail(ST_GeomFromWKT('POLYGON ((30 10, 40 40, 20 40, 30 10, 10 20, 30 10))')) |
| ``` |
| |
| Output: |
| |
| ``` |
| +-----+---------------------------------------------------------+-------------+ |
| |valid|reason |location | |
| +-----+---------------------------------------------------------+-------------+ |
| |false|Ring Self-intersection at or near point (30.0, 10.0, NaN)|POINT (30 10)| |
| +-----+---------------------------------------------------------+-------------+ |
| ``` |
