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spark udf 接受并处理 null值.
2022-07-30 09:29:00 【健忘主义】
难点
spark中处理string列的null方便,但是处理int double之类的就很不方便.
你可能会说 我用 Option[Int] 不就行了么,并不行,udf不支持这个.
你会说我用Any接受,然后判断是否为null或者Int,然而还是不行.
下面给大家一个我的解决方法:
-------------------------
// _ooOoo_
// o8888888o
// 88" . "88
// (| -_- |)
// O\ = /O
// ____/`---'\____
// . ' \\| |// `.
// / \\||| : |||// \
// / _||||| -:- |||||- \
// | | \\\ - /// | |
// | \_| ''\---/'' | |
// \ .-\__ `-` ___/-. /
// ___`. .' /--.--\ `. . __
//
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