implement for expresion evluate
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implements for comparison
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merge i16
add aggregator
merge i16
Merge remote-tracking branch 'origin/i23' into i20
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merge i21
merge i21
merge i21
不分memOnly和FileOnly,改变hbaserecordreader 的 setup(outputMutator)，以使得scanbatch 能拿到数据和materializedField
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修改了处理count_distinct的方式
稍微格式化一下
合并了i20分支