Commercial database systems expose query hints to fix poor plans

produced by the query optimizer. However, current query hints are

not flexible enough to deal with a variety of non-trivial scenarios,

and can be at times cumbersome for DBAs to interact with. In this

demonstration we present a framework that enables visual specification

of hints to influence the optimizer to pick better plans. Our

framework goes considerably beyond existing hinting mechanisms

and significantly improves the usability of such functionality.

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In  SIGMOD

Publisher  Association for Computing Machinery, Inc.
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