imay opened a new issue #1390: Support zone map for column URL: https://github.com/apache/incubator-doris/issues/1390 we should support zone map for column include min/max value for column page. When scan data, we can use this information to eliminate data loading. We should add a ZoneMapBuilder which will encode column zone map information into a page, and ZoneMapDecoder will decode zone map and be used to do some filter. some detail should be discussed later. #1305
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