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问题描述

我想用滤镜进行hbase扫描。例如,我的表具有列族A,B,C,而且A具有列X.一些行具有列X,而一些行不具有列。我怎样才能实现过滤器过滤掉列X的所有行?

解决方案

我想你正在寻找<$ c HBase中的$ c> SingleColumnValueFilter 。正如 API中所述, a>

但是 SingleColumnValueFilter 如果值失败,如果ColumnX不能使用的定点值,如果ColumnX ==X

带上了这一行和 setFilterIfMissing(true),这样如果ColumnX有一些值,它会返回。



你在正确的方向。

I want to do a hbase scan with filters. For example, my table has column family A,B,C, and A has a column X. Some rows have the column X and some do not. How can I implement the filter to filter out all the rows with column X?

解决方案

I guess you are looking for SingleColumnValueFilter in HBase. As mentioned in the API

But SingleColumnValueFilter would want a value to have Column X "CompareOp" to something, say bring this row if ColumnX == "X" or bring this row if ColumnX != "A sentinel value that ColumnX can never take" and setFilterIfMissing(true) so that if ColumnX has some value, it is returned.

I hope this nudges you in the right direction.

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10-16 03:42