Igor Seliverstov created IGNITE-12566:
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Summary: Calcite integration. Expressions evaluation.
Key: IGNITE-12566
URL: https://issues.apache.org/jira/browse/IGNITE-12566
Project: Ignite
Issue Type: Task
Reporter: Igor Seliverstov
Currently we use a part of Calcite "Bindables" to evaluate expressions at the
execution time. Using it we
* lose a control on how expressions are evaluated
* cannot implement several important optimizations, like "keepBinary"
* can use only Object[] as a row, which causes a lot of array copy operations
and unnecessary allocations at the execution time
* suffer from delays, which go from expressions compilation process when it's
more efficient to start from interpretation and compile an expression on
repeatable execution only
We need to implement expressions interpreter and our own expression compiler
taking Ignite specifics in consideration.
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