| title | STIsSimple (geometry Data Type) | ||
|---|---|---|---|
| description | STIsSimple (geometry Data Type) | ||
| author | MladjoA | ||
| ms.author | mlandzic | ||
| ms.date | 08/03/2017 | ||
| ms.service | sql | ||
| ms.subservice | t-sql | ||
| ms.topic | reference | ||
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| monikerRange | =azuresqldb-current || >=sql-server-2016 || >=sql-server-linux-2017 || =azuresqldb-mi-current || =fabric-sqldb |
[!INCLUDE SQL Server Azure SQL Database Azure SQL Managed Instance FabricSQLDB]
Returns 1 if a geometry instance is simple, as defined by the Open Geospatial Consortium (OGC). Returns 0 if a geometry instance is not simple.
.STIsSimple ( )
[!INCLUDEssNoVersion] return type: bit
CLR return type: SqlBoolean
To be simple, a geometry instance must meet all of the following requirements:
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Each figure of the instance must not intersect itself, except at its endpoints.
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No two figures of the instance can intersect each other at a point that is not in both of their boundaries.
The following example creates a nonsimple LineString instance that intersects itself and uses STIsSimple() to test whether the LineString is simple.
DECLARE @g geometry;
SET @g = geometry::STGeomFromText('LINESTRING(0 0, 2 2, 0 2, 2 0)', 0);
SELECT @g.STIsSimple();