Hi folks.
For example, while using Apache Drill, tableau check the attribute DATA_TYPE or pick up sample records to determine data type?
Thanks in advance
Hi Ame,
if your table have datatype defined tableau gives the same data type (hypothetically it will take the same data type format as table)
if you are using any excel or csv with mixed data types tableau follow the below process to check
Tableau determines how to map mixed-value columns to data types by the data types of the first 10,000 rows in an Excel data source, and the first 1,024 rows in a CSV data source. For example, if most of the first 10,000 rows are text values, the entire column is mapped to use the text data type.
Hope this helps
plz mark this answer as correct & helpful to close the thread
BR,
NB
