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https://issues.apache.org/jira/browse/HIVE-25328?focusedWorklogId=622496&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-622496
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ASF GitHub Bot logged work on HIVE-25328:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 14/Jul/21 13:12
Start Date: 14/Jul/21 13:12
Worklog Time Spent: 10m
Work Description: marton-bod opened a new pull request #2475:
URL: https://github.com/apache/hive/pull/2475
### What changes were proposed in this pull request?
Use `REPLACE COLUMNS` only for dropping one or more columns. If there's any
column reorder, column rename, adding columns, changing column type or changing
column comment, we throw an exception.
### Why are the changes needed?
Limit the damage the user can do with this command :)
### Does this PR introduce _any_ user-facing change?
Yes, limitation of the REPLACE command (but only for Iceberg tables; Hive
tables are unaffected).
### How was this patch tested?
unit tests
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Issue Time Tracking
-------------------
Worklog Id: (was: 622496)
Remaining Estimate: 0h
Time Spent: 10m
> Limit scope of REPLACE COLUMNS for Iceberg tables
> -------------------------------------------------
>
> Key: HIVE-25328
> URL: https://issues.apache.org/jira/browse/HIVE-25328
> Project: Hive
> Issue Type: Improvement
> Reporter: Marton Bod
> Assignee: Marton Bod
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Replace columns is a rather wildcard operation which can do heavy-weight
> schema changes. We would only want to allow this operation for dropping
> columns for Iceberg tables. For other changes (adding cols, renaming, type
> promotion etc.), we should use the CHANGE COLUMN command.
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