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https://issues.apache.org/jira/browse/HIVE-6186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HIVE-6186 started by Eric Hanson.
> error in vectorized Column-Column comparison filter for repeating case
> ----------------------------------------------------------------------
>
> Key: HIVE-6186
> URL: https://issues.apache.org/jira/browse/HIVE-6186
> Project: Hive
> Issue Type: Sub-task
> Components: Query Processor
> Affects Versions: 0.13.0
> Reporter: Eric Hanson
> Assignee: Eric Hanson
>
> FilterColumnCompareColumn.txt contains this code:
> } else if (inputColVector1.isRepeating && inputColVector2.isRepeating) {
> if (nullPos1[0] || nullPos2[0]) {
> batch.size = 0;
> }
> This code examines nullPos1[0] and nullPos2[0] without checking that
> noNulls==false for the appropriate vector. This could lead to incorrect
> results.
> We should review the case analysis for this template more generally to make
> sure that all combinations are covered:
> left.noNulls right.noNulls
> T T
> F T
> T F
> F F
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