How to store geotrace type question with more than 255 characters?

Greetings all,

I am trying to collect points GPS coordinate points using geotrace type question. I was taking points for every 5 seconds in 2 minutes. But when i was trying to upload those collected points i was not able to do it as the database column by default taking 255 characters only . I read that by default every field in ODK aggregate is truncated after 255 . So , i have added ' odk:length="6000" ' in the bind nodeset as suggested here https://opendatakit.org/help/form-design/guidelines/ . Then also the data is being truncated after 255 characters. I have seen that this question was asked previously also but there was no response . I am sharing the link where this question was asked previously https://groups.google.com/forum/#!topic/geoodk-community/kW66ELDHhvU . Please help me with it .

Thanks and Regards,
SGSC.