[ 
https://issues.apache.org/jira/browse/HIVE-21886?focusedWorklogId=268234&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-268234
 ]

ASF GitHub Bot logged work on HIVE-21886:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 27/Jun/19 05:12
            Start Date: 27/Jun/19 05:12
    Worklog Time Spent: 10m 
      Work Description: maheshk114 commented on pull request #688: HIVE-21886 : 
REPL - With table list - Handle rename events during replace policy
URL: https://github.com/apache/hive/pull/688#discussion_r298008351
 
 

 ##########
 File path: 
ql/src/java/org/apache/hadoop/hive/ql/parse/repl/dump/events/AlterTableHandler.java
 ##########
 @@ -92,21 +93,46 @@ private Scenario 
scenarioType(org.apache.hadoop.hive.metastore.api.Table before,
     }
   }
 
-  // return true, if event needs to be dumped, else return false.
-  private boolean handleForTableLevelReplication(Context withinContext) {
-    String oldName = before.getTableName();
-    String newName = after.getTableName();
+  private boolean isSetForBootstrapByReplaceHandler(Context withinContext, 
String tblName) {
+    return (withinContext.oldReplScope != null)
+            && 
!(ReplUtils.tableIncludedInReplScope(withinContext.oldReplScope, tblName))
+            && (ReplUtils.tableIncludedInReplScope(withinContext.replScope, 
tblName));
+  }
+
+  // Return true, if event needs to be dumped, else return false.
+  private boolean handleForTableLevelReplication(Context withinContext, String 
tblName) {
+    // For alter, if the table does not satisfy the new policy then ignore the 
event. In case of replace
+    // policy, if the table does not satisfy the old policy, then ignore the 
event. As, if the table satisfy the new
+    // policy, then the table will be bootstrapped by replace handler anb if 
the table does not satisfy the new policy,
+    // then anyways the table should be ignored. The event should be ignored 
if the table is already in the list of
+    // tables to be bootstrapped.
+    if (!ReplUtils.tableIncludedInReplScope(withinContext.replScope, tblName)) 
{
+      // In case of replace, it will be dropped during load. In normal case 
just ignore the alter event.
+      LOG.debug("Table " + tblName + " does not satisfy the policy");
+      return false;
+    } else if 
((withinContext.getTablesForBootstrap().contains(tblName.toLowerCase()))
 
 Review comment:
   done
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 268234)
    Time Spent: 10h 10m  (was: 10h)

> REPL - With table list - Handle rename events during replace policy
> -------------------------------------------------------------------
>
>                 Key: HIVE-21886
>                 URL: https://issues.apache.org/jira/browse/HIVE-21886
>             Project: Hive
>          Issue Type: Sub-task
>          Components: repl
>            Reporter: mahesh kumar behera
>            Assignee: mahesh kumar behera
>            Priority: Major
>              Labels: DR, Replication, pull-request-available
>         Attachments: HIVE-21886.01.patch, HIVE-21886.02.patch
>
>          Time Spent: 10h 10m
>  Remaining Estimate: 0h
>
> If some rename events are found to be dumped and replayed while replace 
> policy is getting executed, it needs to take care of the policy inclusion in 
> both the policy for each table name.
>  1. Create a list of tables to be bootstrapped. 
>   2. During handling of alter table, if the alter type is rename 
>       1. If the old table name is present in the list of table to be 
> bootstrapped, remove it.
>        2. If the new table name, matches the new policy, add it to the list 
> of tables to be bootstrapped.
>   3. During handling of drop table
>        1. if the table is in the list of tables to be bootstrapped, then 
> remove it and ignore the event.
>   4. During other event handling 
>        1. if the table is there in the list of tables to be bootstrapped, 
> then ignore the event.
>  
> Rename handling during replace policy
>  # Old name not matching old policy – The old table will not be there at the 
> target cluster. The table will not be returned by get-all-table.
>  ## Old name is not matching new policy
>  ### New name not matching old policy
>  #### New name not matching new policy
>  ***** Ignore the event, no need to do anything.
>  #### New name matching new policy
>  ***** The table will be returned by get-all-table. Replace policy handler 
> will bootstrap this table as its matching new policy and not matching old 
> policy.
>  ***** All the future events will be ignored as part of check added by 
> replace policy handling.
>  ***** All the event with old table name will anyways be ignored as the old 
> name is not matching the new policy.
>  ### New name matching old policy
>  #### New name not matching new policy
>  ***** As the new name is not matching the new policy, the table need not be 
> replicated.
>  ***** As the old name is not matching the new policy, the rename events will 
> be ignored.
>  ***** So nothing to be done for this scenario.
>  #### New name matching new policy
>  ***** As the new name is matching both old and new policy, replace handler 
> will not bootstrap the table.
>  ***** Add the table to the list of tables to be bootstrapped.
>  ***** Ignore all the events with new name.
>  ***** If there is a drop event for the table (with new name), then remove 
> the table from the the list of table to be bootstrapped.
>  ***** In case of rename event (double rename)
>  ****** If the new name satisfies the table pattern, then add the new name to 
> the list of tables to be bootstrapped and remove the old name from the list 
> of tables to be bootstrapped.
>  ****** If the new name does not satisfies then just removed the table name 
> from the list of tables to be bootstrapped.
>  ## Old name is matching new policy – As per replace policy handler, which 
> checks based on old table, the table should be bootstrapped and event should 
> be ignored. But rename handler should decide based on new name.The old table 
> name will not be returned by get-all-table, so replace handler will not d 
> anything for the old table.
>  ### New name not matching old policy
>  #### New name not matching new policy
>  ***** As the old table is not there at target and new name is not matching 
> new policy. Ignore the event.
>  ***** No need to add the table to the list of tables to be bootstrapped.
>  ***** All the subsequent events will be ignored as the new name is not 
> matching the new policy.
>  #### New name matching new policy
>  ***** As the new name is not matching old policy but matching new policy, 
> the table will be bootstrapped by replace policy handler. So rename event 
> need not add this table to list of table to be bootstrapped.
>  ***** All the future events will be ignored by replace policy handler.
>  ***** For rename event (double rename)
>  ****** If there is a rename, the table (with intermittent new name) will not 
> be present and thus replace handler will not bootstrap the table.
>  ****** So if the new name (the latest one) is matching the new policy, then 
> add it to the list of table to be bootstrapped.
>  ****** And If the new name (the latest one)  is not matching the new policy, 
> then just ignore the event as the  intermittent new name would not have added 
> to the list of table to be bootstrapped.
>  ### New name matching old policy
>  #### New name not matching new policy
>  ***** Dump the event. The table will be dropped by repl load at the target.
>  #### New name matching new policy
>  ***** Replace handler will not bootstrap this table as the new name is 
> matching both policies.
>  ***** As old name is not matching the old policy, the table will not be 
> there at target. The rename event should add the new name to the list of 
> table to be bootstrapped.
>  ***** Subsequent events with new table name should be ignored.
>  ***** Drop events should not be ignored as if the table is present during 
> bootstrapped, then its a new table and thus should be dropped.
>  ***** In case of rename event (double rename)
>  ****** If the new name satisfies the table pattern, then add the new name to 
> the list of tables to be bootstrapped and remove the old name from the list 
> of tables to be bootstrapped.
>  ****** If the new name does not satisfies then just removed the table name 
> from the list of tables to be bootstrapped.
>  # Old name is matching old policy – The old table will be there at the 
> target cluster. The table will not be returned by get-all-table. Repl load 
> should delete the old table as it is not matching the new policy.
>  ## Old name is not matching new policy
>  ### New name not matching old policy
>  #### New name not matching new policy
>  ***** Nothing to be done. Ignore the event.
>  #### New name matching new policy
>  ***** As the new name is not matching old policy but matching new policy, 
> the table will be bootstrapped by replace policy handler. So rename event 
> need not add this table to list of table to be bootstrapped.
>  ***** All the future events will be ignored by replace policy handler.
>  ***** For rename event (double rename)
>  ****** If there is a rename, the table (with intermittent new name) will not 
> be present and thus replace handler will not bootstrap the table.
>  ****** So if the new name (the latest one) is matching the new policy, then 
> add it to the list of table to be bootstrapped.
>  ****** And If the new name (the latest one)  is not matching the new policy, 
> then just ignore the event as the  intermittent new name would not have added 
> to the list of table to be bootstrapped.
>  ### New name matching old policy
>  #### New name not matching new policy
>  ***** Table with new name will be dropped by repl load
>  ***** Along with other event, ignore the rename event also.
>  #### New name matching new policy
>  ***** As the new name is matching both old and new policy, replace handler 
> will not bootstrap the table.
>  ***** Add the table to the list of tables to be bootstrapped.
>  ***** Ignore all the events with new name.
>  ***** If there is a drop event for the table (with new name), then remove 
> the table from the the list of table to be bootstrapped.
>  ***** In case of rename event (double rename)
>  ****** If the new name satisfies the table pattern, then add the new name to 
> the list of tables to be bootstrapped and remove the old name from the list 
> of tables to be bootstrapped.
>  ****** If the new name does not satisfies then just removed the table name 
> from the list of tables to be bootstrapped.
>  ## Old name is matching new policy
>  ### New name not matching old policy
>  #### New name not matching new policy
>  ***** The old table needs to be dropped at target. Ignore this event, as the 
> old table is not matching the new policy, it will be dropped by repl load.
>  #### New name matching new policy
>  ***** Allow the event to dump and replayed at target.
>  ***** Allow further events to be handled as usual.
>  ***** In case of rename event (double rename)
>  ****** If the latest new name is matching the new policy, then keep it as is 
> it. Let rename event replayed at target.
>  ****** If the latest new name is not matching the new policy, then change 
> the rename event to drop event.
>  ### New name matching old policy
>  #### New name not matching new policy
>  ##### Nothing to be done.
>  #### New name matching new policy
>  ##### Add the table name to the list of tables to be bootstrapped.



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