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Type:
Sub-task
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Status: Resolved
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: Impala 2.7.0
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Fix Version/s: Impala 2.8.0
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Component/s: Backend
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Labels:
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Target Version:
Codegen'd code currently has certain operator-specific constants baked into it. E.g. the HashTableCtx address. This limits flexibility if we want to e.g. cache codegen'd objects or share codegen'd objects between different fragment instances.
I attached a proof-of-concept codegen caching implementation based on the LLVM bitcode generated by the operators. It's interesting because a cache hit implies that the codegen'd module content was identical.
- blocks
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IMPALA-4080 Share codegen work between fragment instances
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- Resolved
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