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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-1065) Provide a reset command to reset an option to its default value
Date Thu, 01 Oct 2015 02:13:04 GMT

    [ https://issues.apache.org/jira/browse/DRILL-1065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14939177#comment-14939177
] 

ASF GitHub Bot commented on DRILL-1065:
---------------------------------------

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

    https://github.com/apache/drill/pull/159#discussion_r40873825
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/server/options/TypeValidators.java
---
    @@ -179,6 +181,7 @@ public void validate(final OptionValue v) {
     
         public TypeValidator(final String name, final Kind kind, final OptionValue defValue)
{
           super(name);
    +      checkArgument(defValue.type == OptionType.SYSTEM, "Default value must be SYSTEM
type.");
    --- End diff --
    
    This check is when a TypeValidator (static instance) is created, so developers know not
to create a validator with non SYSTEM level option type. Nothing to do with usage. Right?


> Provide a reset command to reset an option to its default value
> ---------------------------------------------------------------
>
>                 Key: DRILL-1065
>                 URL: https://issues.apache.org/jira/browse/DRILL-1065
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Execution - Flow
>            Reporter: Aman Sinha
>            Assignee: Sudheesh Katkam
>            Priority: Minor
>             Fix For: 1.2.0
>
>
> Within a session, currently we set configuration options and it would be very useful
to have a 'reset' command to reset the value of an option to its default system value: 
>   ALTER SESSION RESET <option name> 
> If we don't want to add a new keyword for RESET, we could potentially overload the SET
command and allow the user to set to the 'default' value.



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