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c#multithreadingsqlgeometry

Is SqlGeometry.STUnion method thread safe?

Is SqlGeometry.STUnion method thread safe in .Net? MSDN

Solution

  • Decompiled body from sql 11.0 assembly using JustDecompile:

        [SqlMethod(IsDeterministic=true, IsPrecise=false)]
    public SqlGeometry STUnion(SqlGeometry other)
    {
        if (this.IsNull || other == null || other.IsNull || this.Srid != other.Srid)
        {
            return SqlGeometry.Null;
        }
        this.ThrowIfInvalid();
        other.ThrowIfInvalid();
        return SqlGeometry.Construct(GLNativeMethods.Union(this.GeoData, other.GeoData), this.Srid);
    }

    where SqlGeography.Construct and GLNativeMethods.GeodeticUnion are static methods, while others can't be deadlocked anywhere. None of the methods used is modifying the calling object, so yes - it's thread safe.