I am bit not clear on Hyper Columnar database which is used to store 'Extract' rows as column.
I have seen that Tableau bought 'Hyper' Engine/Database on 2016.
PostGre Database is used as repository? is this Columnar database?
is Hyper Data Engine ? or Columnar Database?
If Engine, is Hyper sit on top of PostGre Database?
If both are different, is there any link between Hyper & PostGre SQL?
The Tableau Server repository is stored in a PostgreSQL database (see Collect Data with the Tableau Server Repository ). Hyper is an in-memory data engine. Tableau extracts are stored in a Hyper file, which can then be easily read and processed using the Hyper engine. They are both used in Tableau Server, but have different purposes.