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https://issues.apache.org/jira/browse/IGNITE-12566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yury Gerzhedovich updated IGNITE-12566:
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Labels: calcite2-required calcite3-required (was: )
> Calcite integration. Expressions evaluation.
> --------------------------------------------
>
> Key: IGNITE-12566
> URL: https://issues.apache.org/jira/browse/IGNITE-12566
> Project: Ignite
> Issue Type: Task
> Reporter: Igor Seliverstov
> Assignee: Igor Seliverstov
> Priority: Major
> Labels: calcite2-required, calcite3-required
>
> 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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