[IGNITE-12566] Calcite integration. Expressions evaluation.

• Type: Task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Labels: calcite2-required calcite3-required
• Ignite Flags: Docs Required, Release Notes Required
• Assignee: Igor Seliverstov
• Reporter: Igor Seliverstov
• Created: 22/Jan/20 12:00
• Updated: 18/Jun/21 09:34

Description

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.

Issue Links

• incorporates: IGNITE-12708 Calcite integration. Expressions factory base implementation.
• is part of: IGNITE-12248 Apache Calcite based query execution engine