We created a MySql data link in which the framework can display the table structure, but when we executed the SQL statement, the result was not returned for a long time.
Can you provide more information about your setup? What version of Redash are you running? When you execute the SQL through a different application does the query take a similarly long time to execute? How many rows of data are being returned?
Versions used: 7.0 beta and 6.0 official.
Test data source: postgresql, MySQL, SqlServer
Each data source creates a test library table with only two rows of data in it. The query panel using redash cannot query the result. The performance is always in the query, that is, there is no return value, even if it is an error message.
Client queries provided using their respective data sources are very fast