We created a MySql data link And a sqlserver data link, in which the framework can display the table structure, but when we executed the SQL statement, return no data.

Did you figure this out? If not, I have a few questions.

  1. Do any of your queries return data? What happens if you run SELECT 1 as [value] in your SQL server data source?
  2. What do you mean by “the framework can display the table structure”? Do you mean that your table schemas appear in the schema browser from the query screen?
  3. What version of Redash are you running? SaaS or hosted? If hosted, where are you hosting it?