Restrict to string column for query parameter
Restrict to string column for query parameter

moritz9/redash,getredash/redash,44px/redash,44px/redash,denisov-vlad/redash,getredash/redash,44px/redash,moritz9/redash,crowdworks/redash,chriszs/redash,getredash/redash,rockwotj/redash,denisov-vlad/redash,getredash/redash,getredash/redash,chriszs/redash,denisov-vlad/redash,hudl/redash,moritz9/redash,alexanderlz/redash,alexanderlz/redash,chriszs/redash,crowdworks/redash,crowdworks/redash,rockwotj/redash,hudl/redash,44px/redash,hudl/redash,rockwotj/redash,denisov-vlad/redash,alexanderlz/redash,hudl/redash,denisov-vlad/redash,rockwotj/redash,moritz9/redash,crowdworks/redash,alexanderlz/redash,chriszs/redash