UDFArrayIntersect代码逻辑有问题，会出现数组越界异常或者出现错误返回值。

[cceazj]

https://github.com/aaronshan/hive-third-functions/blame/f98fef86d328882c85ea40b69b14375d90d44201/src/main/java/com/github/aaronshan/functions/array/UDFArrayIntersect.java#L160 select default.array_intersect(array("39236600","38943350","39007633"),array("39236600","38943350","39007633","38593565","39165420","39119191","39223090","39273131","39113697","39264583","38643724","39243639","39273301","39153039","39152750","38422867","39194210")); 返回值应该是{"39236600","38943350","39007633"}，但实际上只返回了一个。

查看了代码，发现compare方法逻辑错误，应修复为一下： private int compare(ListObjectInspector arrayOI, Object array, int[] positions, int position1, int position2) { ObjectInspector arrayElementOI = arrayOI.getListElementObjectInspector(); Object arrayElementTmp1 = arrayOI.getListElement(array, positions[position1]); Object arrayElementTmp2 = arrayOI.getListElement(array, positions[position2]); return ObjectInspectorUtils.compare(arrayElementTmp1, arrayElementOI, arrayElementTmp2, arrayElementOI); } 即参数中增加int[] positions，传递进来leftPositions或者rightPositions，相应方法调用出也需一并修改。