Are the dates in your Teradata database INTERVAL types? Interval types are currently limited in how they are brought into Tableau--they are recognized as strings. However, a calculated field field using RAWSQL can be used as a possible workaround. Hopefully, creating a calculated field similar to the following will help resolve the issue:
RAWSQL_REAL("CAST(EXTRACT(DAY FROM %1) AS DOUBLE PRECISION) + CAST(EXTRACT(HOUR FROM %1) AS DOUBLE PRECISION)/24 + CAST(EXTRACT(MINUTE FROM %1) AS DOUBLE PRECISION)/(24*60) + CAST(EXTRACT(SECOND FROM %1) AS DOUBLE PRECISION)/(24*3600)",[field name])
Hope you are doing well.
I am also having the issue while connecting to Teradata. Did this issue get solved?
If yes could you please guide me in solving this issue.