[IMPALA-5351] Handle column comments for Kudu tables

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.9.0
• Fix Version/s: Impala 3.3.0
• Component/s: Catalog
• Labels: kudu
• Epic Color: ghx-label-1
• Assignee: LiFu He
• Reporter: Thomas Tauber-Marshall
• Created: 22/May/17 17:45
• Updated: 03/May/19 21:26
• Resolved: 03/May/19 20:31

Description

Currently, if a column comment is specified in a CREATE TABLE for a Kudu table, we just silently drop it because Kudu does not currently support column comments (KUDU-1711).

One option would be to store the comments in HMS, but splitting the metadata between HMS and Kudu is probably more complicated than its worth.

Most likely, we can just wait for it to be implemented on the Kudu side, but before then we may want to consider issuing a warning when people use column comments on Kudu tables.

Issue Links

• is related to: KUDU-1711 Add support for storing column comments in ColumnSchema