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?
