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https://issues.apache.org/jira/browse/ARROW-1865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16271072#comment-16271072
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ASF GitHub Bot commented on ARROW-1865:
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wesm opened a new pull request #1373: ARROW-1865: [C++] Do not alter number of
rows attribute when removing last column from Table
URL: https://github.com/apache/arrow/pull/1373
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> [C++] Adding a column to an empty Table fails
> ---------------------------------------------
>
> Key: ARROW-1865
> URL: https://issues.apache.org/jira/browse/ARROW-1865
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Reporter: Uwe L. Korn
> Assignee: Wes McKinney
> Labels: pull-request-available
> Fix For: 0.8.0
>
>
> If we remove a column from a table and add new column (probably a casted
> version of it), it is rejected as the Table {{num_rows}} was reset to 0:
> {code}
> Invalid: Added column's length must match table's length. Expected length 0
> but got length 1
> {code}
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