[Core] add query optimizer component

dsukhoroslov / bagri

XML/Document DB on top of distributed cache

Apache License 2.0

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Open dsukhoroslov opened 8 years ago

dsukhoroslov commented 8 years ago

will decide, which indexes should be used and which one should not (from stats)
combine several expressions around the same path into one single expression (> AND < to BETWEEN, for instance)
expose query plan via JMX