Yes, need to solve it , the CI should support different spark version.


zhujin wrote
> One issue:
> I modified the spark.version in pom.xml,using spark1.6.2, then compliation
> failed.
> Root cause:
> There was a "unused import statement" warinng in CarbonOptimizer class
> before, we imported AggregationExpression like the following : 
> import org.apache.spark.sql.catalyst.expressions.aggregate._
> import org.apache.spark.sql.catalyst.expressions._
> But in spark1.6.2, AggregateExpressions is moved to subpackage "aggregate"
> from "expressions"(that is for spark1.5.2).
> So if we didn't known this change, we removed this import "import
> org.apache.spark.sql.catalyst.expressions.aggregate._", it will cause
> compliation failure when using spark1.6.2
> Question:
> So, maybe the CI should verify carbondata based on different version
> spark, then it will be more helful to check the correctness of the
> commits, shall we?

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