"Union all" throws "java.lang.ArrayIndexOutOfBoundsException"

[roncenzhao <ro...@qq.com>]

// Consider://    SEL_1 (int)   SEL_2 (int)    SEL_3 (double)// If we first merge SEL_1 and SEL_2 into a UNION_1, and then merge UNION_1// with SEL_3 to get UNION_2, then no SelectOperator will be inserted. Hence error// will happen afterwards. The solution here is to insert one after UNION_1, which// cast int to double.


In 'SemanticAnalyzer.java', we resolve it only if the engine is spark or tez.
But with MR engine, I also encounter this problem.


Would you give me some advices about this problem.


Thanks~