Import Lombok and override the equals and hashCode methods for expression and plan nodes #703
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Description
Some expression and plan nodes in PPL Spark lack of
equals
andhashCode
methods which may cause potential bugs.Import Lombok dependency for
ppl-spark-integration
module and align the related codes with SQL's implementation.This is a code refactor PR which doesn't introduce any new functionality.
Issues Resolved
Resolves #702
Check List
[ ] Updated documentation (ppl-spark-integration/README.md)[ ] Implemented unit tests[ ] Implemented tests for combination with other commandsBy submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
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