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https://issues.apache.org/jira/browse/HIVE-26355?focusedWorklogId=786619&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-786619
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ASF GitHub Bot logged work on HIVE-26355:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 30/Jun/22 14:31
Start Date: 30/Jun/22 14:31
Worklog Time Spent: 10m
Work Description: pvary commented on PR #3406:
URL: https://github.com/apache/hive/pull/3406#issuecomment-1171295279
> I have also considered to convert the column names at the top method like
`alter_table`, but since there are only two methods (`areSameColumns` and
`arePrefixColumns`) that will take use of the compare of names, so I made the
conversion in these two methods.
Could you please add a javadoc which describes that the methods are case
independent?
Issue Time Tracking
-------------------
Worklog Id: (was: 786619)
Time Spent: 50m (was: 40m)
> Column compare should be case insensitive for name
> --------------------------------------------------
>
> Key: HIVE-26355
> URL: https://issues.apache.org/jira/browse/HIVE-26355
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Affects Versions: 4.0.0-alpha-1
> Reporter: Wechar
> Assignee: Wechar
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0-alpha-2
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Hive stores all name related value as lower case, such as db_name, tbl_name,
> col_name etc. But the compare of {{FieldSchema}} does not ignore the case of
> name, which may cause incorrect result of compare.
> *Bug Description:*
> Some computing engines are case sensitive for column name. For example, Spark
> will add a table property to save the column fields when creating a table,
> and will replace column fields with this property when fetching table fields.
> When calling {{*ALTER TABLE ... ADD COLUMNS*}}, the compare of fields between
> old table and new table will be not expected, and the ADD COLUMNS operation
> will be cascaded to PARTITIONS, which is unnecessary and time consuming if
> the table has many partitions.
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