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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-4579) Add a config to conditionally create Phoenix meta tables on first client connection
Date Fri, 23 Mar 2018 01:19:00 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-4579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16410662#comment-16410662
] 

ASF GitHub Bot commented on PHOENIX-4579:
-----------------------------------------

Github user ChinmaySKulkarni commented on a diff in the pull request:

    https://github.com/apache/phoenix/pull/295#discussion_r176617368
  
    --- Diff: phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java
---
    @@ -2405,16 +2413,26 @@ public Void call() throws Exception {
                                 openConnection();
                                 hConnectionEstablished = true;
                                 boolean isDoNotUpgradePropSet = UpgradeUtil.isNoUpgradeSet(props);
    +                            boolean doesSystemCatalogAlreadyExist = false;
    --- End diff --
    
    @JamesRTaylor @twdsilva also, do we really want to avoid calling ensureTableCreated from
createTable in case it is a system table? Apart from actually ensuring that the table is created
or not and the client-server compatibility checks, this method also modifies the table according
to a new descriptor (I don't have enough background as to why we do this here). Any advice
guys?


> Add a config to conditionally create Phoenix meta tables on first client connection
> -----------------------------------------------------------------------------------
>
>                 Key: PHOENIX-4579
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-4579
>             Project: Phoenix
>          Issue Type: New Feature
>            Reporter: Mujtaba Chohan
>            Assignee: Chinmay Kulkarni
>            Priority: Major
>         Attachments: PHOENIX-4579.patch
>
>
> Currently we create/modify Phoenix meta tables on first client connection. Adding a property
to make it configurable (with default true as it is currently implemented).
> With this property set to false, it will avoid lockstep upgrade requirement for all clients
when changing meta properties using PHOENIX-4575 as this property can be flipped back on
once all the clients are upgraded.



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