[MCOL-1613] CLONE - Data missing after upgrade from 1.0.11 - 1.0.14 Created: 2018-07-30  Updated: 2019-07-10  Resolved: 2019-07-10

Status: Closed
Project: MariaDB ColumnStore
Component/s: DDLProc, MariaDB Server, PrimProc
Affects Version/s: 1.0.14
Fix Version/s: Icebox

Type: Bug Priority: Major
Reporter: Abhinav santi Assignee: Unassigned
Resolution: Cannot Reproduce Votes: 0
Labels: None
Environment:

AWS AMI, 4PMs, 1 UM Centos. c8.xlarge



 Description   

Hello,

I recently upgraded MCOL from 1.0.11 - 14 and after the upgrade some of the table's are truncated. When dug deeper, I found that tables without comment 'schema sync only' are missing data.

I dropped and recreated the tables with comment schema sync only option but after the creation all the queries throw Error code 1815 internal error IDB-2006 TABLE DOESNOT EXISTS IN COLUMNSTORE .
May I know the significance of "COMMENT = Schema sync only" In columnstore. Is there any documentation available on this?

Thanks in Advance



 Comments   
Comment by Andrew Hutchings (Inactive) [ 2018-07-31 ]

We would have needed to see a support report generated when you hit the problem to determine the cause, my guess is some of your PM nodes did not come up correctly. Unfortunately it is unlikely we will be able to do this if you have dropped the tables.

When you create a table with "schema sync only" it only creates the metadata for the table in MariaDB server, it does not create the table in ColumnStore's engine. This is usually used internally to syncronize schemas between ColumnStore UM nodes.

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