[#138] store original query text to detect changes
[#138] store original query text to detect changes

rockwotj/redash,pubnative/redash,easytaxibr/redash,easytaxibr/redash,amino-data/redash,moritz9/redash,denisov-vlad/redash,crowdworks/redash,hudl/redash,stefanseifert/redash,chriszs/redash,M32Media/redash,denisov-vlad/redash,getredash/redash,pubnative/redash,alexanderlz/redash,imsally/redash,44px/redash,getredash/redash,moritz9/redash,amino-data/redash,ninneko/redash,useabode/redash,rockwotj/redash,pubnative/redash,alexanderlz/redash,imsally/redash,crowdworks/redash,vishesh92/redash,crowdworks/redash,stefanseifert/redash,ninneko/redash,akariv/redash,guaguadev/redash,akariv/redash,alexanderlz/redash,hudl/redash,rockwotj/redash,hudl/redash,denisov-vlad/redash,easytaxibr/redash,jmvasquez/redashtest,jmvasquez/redashtest,imsally/redash,EverlyWell/redash,M32Media/redash,easytaxibr/redash,ninneko/redash,vishesh92/redash,ninneko/redash,amino-data/redash,hudl/redash,vishesh92/redash,M32Media/redash,useabode/redash,44px/redash,rockwotj/redash,jmvasquez/redashtest,alexanderlz/redash,denisov-vlad/redash,stefanseifert/redash,guaguadev/redash,stefanseifert/redash,getredash/redash,amino-data/redash,chriszs/redash,easytaxibr/redash,M32Media/redash,denisov-vlad/redash,pubnative/redash,44px/redash,guaguadev/redash,crowdworks/redash,moritz9/redash,EverlyWell/redash,getredash/redash,EverlyWell/redash,jmvasquez/redashtest,useabode/redash,imsally/redash,ninneko/redash,akariv/redash,guaguadev/redash,chriszs/redash,pubnative/redash,guaguadev/redash,vishesh92/redash,getredash/redash,chriszs/redash,useabode/redash,stefanseifert/redash,44px/redash,jmvasquez/redashtest,moritz9/redash,akariv/redash,akariv/redash,EverlyWell/redash