BJangir opened a new pull request #3238: [CARBONDATA-3397]Remove SparkUnknown Expression to Index Server
URL:
https://github.com/apache/carbondata/pull/3238
### Problem
if Query has UDF and it is registered to the Main driver Since UDF function will not be available in Index server , query will be failed in Indexserver (with NoClassDefincationFound).
###Solution
1. UDF are SparkUnkownFilter(RowLevelFilterExecuterImpl) so Remove the SparkUnknown Expression because anyway for pruning we select all blocks. org.apache.carbondata.core.scan.filter.executer.RowLevelFilterExecuterImpl#isScanRequired.
2. Supply all the UDFs functions and it's related lambda expressions to IndexServer also. But it has below issues
a. Spark FunctionRegistry is not writable
b. sending All functions from Main Server to Index server will be costly. since no way to find implicit function and explicit user created functions.
So Solution 1 is adopted.
Be sure to do all of the following checklist to help us incorporate
your contribution quickly and easily:
- [ ] Any interfaces changed?
NO
- [ ] Any backward compatibility impacted?
NO
- [ ] Document update required?
NO
- [ ] Testing done
Please provide details on
- Whether new unit test cases have been added or why no new tests are required?
- How it is tested? Please attach test report.
- Is it a performance related change? Please attach the performance test report.
- Any additional information to help reviewers in testing this change.
Manually tested
- [ ] For large changes, please consider breaking it into sub-tasks under an umbrella JIRA.
NA
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