private string FunctionBeforeQuery <T>(MetadataBuilder builder, ExecutionInformation info, OracleUdtInfo udt, out MetadataBase metadata, out OracleParameter parameter)
{
if (typeof(T).IsBoolean())
{
metadata = _MetadataFactory.CreateBoolean();
parameter = null;
return("ret := ");
}
else if (typeof(T).IsClrType())
{
metadata = new MetadataBase();
parameter = FunctionReturnOracleParameter <T>(info, metadata);
return($"{parameter.ParameterName} := ");
}
else
{
metadata = builder.GetOrRegisterMetadataOracleObject <T>(udt);
parameter = null;
return("ret := ");
}
}