{"id":158611,"date":"2009-10-01T00:00:00","date_gmt":"2009-10-01T00:00:00","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/msr-research-item\/qex-symbolic-sql-query-explorer\/"},"modified":"2018-10-16T19:59:46","modified_gmt":"2018-10-17T02:59:46","slug":"qex-symbolic-sql-query-explorer","status":"publish","type":"msr-research-item","link":"https:\/\/www.microsoft.com\/en-us\/research\/publication\/qex-symbolic-sql-query-explorer\/","title":{"rendered":"Qex: Symbolic SQL Query Explorer"},"content":{"rendered":"<div class=\"asset-content\">\n<p>We describe a technique and a tool called Qex for generating input tables and parameter values for a given parameterized SQL query.  The evaluation semantics of an SQL query is translated into a specific background theory for a satisfiability modulo theories (SMT) solver as a set of equational axioms.  Symbolic evaluation of a goal formula together with the background theory yields a model from which concrete tables and values are extracted.  We use the SMT solver Z3 in the concrete implementation of Qex and provide an evaluation of its performance.<\/p>\n<\/div>\n<p><!-- .asset-content --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>We describe a technique and a tool called Qex for generating input tables and parameter values for a given parameterized SQL query. The evaluation semantics of an SQL query is translated into a specific background theory for a satisfiability modulo theories (SMT) solver as a set of equational axioms. Symbolic evaluation of a goal formula [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","footnotes":""},"msr-content-type":[3],"msr-research-highlight":[],"research-area":[13560],"msr-publication-type":[193718],"msr-product-type":[],"msr-focus-area":[],"msr-platform":[],"msr-download-source":[],"msr-locale":[268875],"msr-post-option":[],"msr-field-of-study":[],"msr-conference":[],"msr-journal":[],"msr-impact-theme":[],"msr-pillar":[],"class_list":["post-158611","msr-research-item","type-msr-research-item","status-publish","hentry","msr-research-area-programming-languages-software-engineering","msr-locale-en_us"],"msr_publishername":"Microsoft 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