public override void Describe()
{
lock (this.db)
{
// Update structure
this.fields = new Descriptor(this.fields.ActualCount);
// Marshal structures to pointer
XsqldaMarshaler marshaler = XsqldaMarshaler.GetInstance();
IntPtr sqlda = marshaler.MarshalManagedToNative(this.db.Charset, fields);
int[] statusVector = FesConnection.GetNewStatusVector();
int stmtHandle = this.handle;
FbClient.isc_dsql_describe(
statusVector,
ref stmtHandle,
IscCodes.SQLDA_VERSION1,
sqlda);
// Marshal Pointer
Descriptor descriptor = marshaler.MarshalNativeToManaged(this.db.Charset, sqlda);
// Free memory
marshaler.CleanUpNativeData(ref sqlda);
// Parse status vector
this.db.ParseStatusVector(statusVector);
// Update field descriptor
this.fields = descriptor;
}
}