Saumya,
Thank you for your reply. The datatype for the columns is defined in the MDO as floats. My query is an MDO select query so there is no type assignment there. The error messages in the logs do not affect or manifest themselves at the query or transaction level. The query returns the expected data and everything functions fine. Because of this it actually took a while to figure out where the excessive log messages were coming from.
Regards,
Christian