Chaoyu Tang created HIVE-8839:
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Summary: Support "alter table .. add/replace columns cascade"
Key: HIVE-8839
URL: https://issues.apache.org/jira/browse/HIVE-8839
Project: Hive
Issue Type: Improvement
Components: SQL
Environment:
Reporter: Chaoyu Tang
Assignee: Chaoyu Tang
Fix For: 0.15.0
We often run into some issues like HIVE-6131which is due to inconsistent column
descriptors between table and partitions after alter table. HIVE-8441/HIVE-7971
provided the flexibility to alter table at partition level. But most cases we
have need change the table and partitions at same time. In addition, "alter
table" is usually required prior to "alter table partition .." since querying
table partition data is also through table. Instead of do that in two steps,
here we provide a convenient ddl like "alter table ... cascade" to cascade
table changes to partitions as well. The changes are only limited and
applicable to add/replace columns and change column name, datatype, position
and comment.
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