Is SqlGeometry.STUnion method thread safe?

Question

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

score 1 · Accepted Answer · answered Apr 23 '14 at 11:17

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.

score 0 · Answer 2 · answered Apr 23 '14 at 10:47

0

How can it not be? SqlGeometry seems to be immutable - so the input of 2 immutable classes should be a determined output.

answered Apr 23 '14 at 10:47

TomTom

61,059
10
88
148

I don't understand very well. I have more than 100 thousand items to make union and it is very slow in one cycle. – Musketyr Apr 23 '14 at 10:51

Is SqlGeometry.STUnion method thread safe?

2 Answers2