From these lines at https://github.com/getredash/redash/blob/c49dccf254268fb8d0725338e09b09dd36fc606e/client/app/visualizations/index.js#L120-L122

When we opened the query, the filter takes first value from the arrays. Normally I have to click “Select All” manually, but how should I modify the code if I want all to be selected (if it is possible) ?

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This would definitely be a useful feature. It isn’t currently supported Redash. There’s a feature request for it here on the forum. It will help draw attention to it if you like (or heart) that feature request.

If you are able to solve the issue by modifying the Javascript you may consider opening a PR on the open source repository.

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I found a way to do this using Query Parameters and wrote about it here.

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