[
https://issues.apache.org/jira/browse/TRAFODION-2025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15316074#comment-15316074
]
Roberta Marton commented on TRAFODION-2025:
-------------------------------------------
As part of DDL transaction work, there is a goal to run all DDL and DDL like
operations in a single DDL transaction. This delivery changes initialize
trafodion and initialize authorization to make this happen.
Prior to DDL transactions, initialize authorization would either add or drop
authorization support. Part of this required that all compiler processes
associated with the master process be killed to clear out information stored
in memory. When DDL transactions were added, killing the compiler processes
caused the DDL transaction to abort. This means that initialize authorization
could not be run in DDL transation. Initialize trafodion calls initialize
authorization when security is enabled, so initialize trafodion was not able
to run in DDL transactions.
A change was made to send a CmpMessageDatabaseUser request to the child arkcmp
processes after authorization was initialized or dropped. This request is
reponsible for setting appropriate memory attributes so we no longer require
arkcmps to be terminated. Changes were piggy backed on current support that
sends usernames and IDs to child arkcmps.
To make this work, the following code was changed to generate and recognize the
new message format:
CmpStatement.cpp (process - CmpMessageDatabaseUser)
Context.cpp (createMxcmpSession & updateMxcmpSession)
ExSqlComp.cpp (resendControls)
The following was changed to support DDL transactions:
CmpSeabaseDDLcommon.cpp (initSeabaseAuthorization & dropSeabaseAuthorization)
GenPreCode.cpp (allow DDL transaction for initialize trafodion)
SqlciErrors.txt (allow initialize authorization to succeed with warnings)
This also includes a change on how Trafodion processes alter user operations
that allow predefined users to be modified by someone with the correct
privileges.
A new method called ContextCli::updateMxcmpSession is called during initialize
and drop requests. This calls send a message to associated arkcmp process to
update session attributes for user information. It then propagates the message
to other child arkcmp processes.
> Initialize authorization cannot be run in a DDL transaction
> -----------------------------------------------------------
>
> Key: TRAFODION-2025
> URL: https://issues.apache.org/jira/browse/TRAFODION-2025
> Project: Apache Trafodion
> Issue Type: Improvement
> Reporter: Roberta Marton
> Assignee: Roberta Marton
>
> Initialize authorization currently runs in multiple transactions. Now that
> DDL transactions are enabled, initialize and drop options should run in a
> single transactions.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
