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Why do I see Limit 0 queries on the AtScale Query screen?

AtScale shows Limit 0 queries before issuing a real query.

For example:

  • 1st query: SELECT * FROM ([The Actual Query]) LIMIT_ZERO LIMIT 0
  • 2nd query: The Actual Query

RESOLUTION

Tableau is issuing this query to get metadata for the real query.  

More information can be found here:
https://community.tableau.com/thread/230908