"invalid LRS segment" when querying an Oracle Spatial DB

Question

I have a table of GIS segments in an Oracle Spatial database. I'm using C# and ODP to connect to the database. For a given measure from the start of a segment, I want to find the GPS coordinates for that point. I'm running the following query:
select g.geom.sdo_ordinates ord_array from
*(select sdo_lrs.locate_pt(shape,0.02,0) as geom from test_schema.test_table*
where route='ABC' and segmentnum='101.1') g
where shape is of type SDO_GEOMETRY. I'm getting the following error:
ORA-13331: invalid LRS segment
Is there a problem with how I'm passing shape to locate_pt()? The Oracle Spatial documentation says the argument should be SDO_geometry, so that seems ok.
Edited by: 964844 on Oct 11, 2012 2:10 PM

Answer 1

I'm using C# with ODP.NET.
Here is the current version of the code that is failing:
var param = new OracleParameter("geom", OracleDbType.Object);
param.UdtTypeName = "MDSYS.SDO_GEOMETRY";
param.Direction = ParameterDirection.Input;
OracleCommand oCmd = new OracleCommand();
oCmd.Connection = this.oConn;
oCmd.CommandText = queryStr;
oCmd.CommandType = CommandType.Text;
oCmd.Parameters.Add(param);
OracleDataAdapter da = new OracleDataAdapter(oCmd);
DataTable dt = new DataTable();
da.Fill(dt);
The exception is generated by the da.Fill(dt) line.