[IMPALA-4622] Support changing Kudu default and storage attributes

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.8.0, Impala 2.9.0
• Fix Version/s: Impala 2.10.0
• Component/s: Frontend
• Labels: kudu
• Target Version: Impala 2.10.0
• Assignee: Thomas Tauber-Marshall
• Reporter: Matthew Jacobs
• Created: 08/Dec/16 01:21
• Updated: 02/Oct/17 18:20
• Resolved: 23/Jun/17 14:28

Description

Add Impala support for:

KUDU-861 Support changing default, storage attributes

This patch adds support for adding, changing, or removing column defaults
and changing the storage attributes of a column. Changes to a column are
encoded as a ColumnSchemaDelta, which can be merged with a ColumnSchema
to change it.

Changing type and nullability of a column is still unsupported.

No failures in 100+ iterations of alter_table-randomized-test.

I also ran into an issue with altering RLE columns:
1. Add an RLE-encoded column to a table
2. Alter the column
3. Scan the column
3 will cause a check failure on scanning to pos 0 of an empty RLE
block. Test and fix included.

Change-Id: I457d99ba2188ef6e439df47c0d94f2dc1a62ea6c
Reviewed-on: http://gerrit.cloudera.org:8080/4310
Tested-by: Kudu Jenkins
Reviewed-by: Dan Burkert <[e-mail]>