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https://issues.apache.org/jira/browse/ARROW-14418?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mayur Srivastava closed ARROW-14418.
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Resolution: Duplicate
Duplicate of https://issues.apache.org/jira/browse/ARROW-13981
> [Java] Fix VectorAppender to correctly append data buffer for BitVector
> -----------------------------------------------------------------------
>
> Key: ARROW-14418
> URL: https://issues.apache.org/jira/browse/ARROW-14418
> Project: Apache Arrow
> Issue Type: Bug
> Components: Java
> Reporter: Mayur Srivastava
> Assignee: Mayur Srivastava
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> VectorAppender uses type-width to copy the data buffer from delta vector to
> target vector. But, BitVector's type-width is 0, hence, its data buffer does
> not get copied to the target vector. The VectorAppender should be fixed to
> correctly handle data buffer copy for the BitVector.
> The current behavior is as follows:
> # The validity vector is correctly appended.
> # The data buffer is not appended.
> This means that is the delta vector contains 1's (true values), they are
> appended as false.
> e.g.
> Target BitVector = \{1, 0, null}, and
> Delta BitVector = \{1, 0, null}, then
> the result is \{1, 0, null, 0, 0, null}. <== notice the fourth element is
> copied as 0 (or false).
> The correct result is \{1, 0, null, 1, 0, null}.
>
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