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Date: Mon, 23 May 2016 22:21:12 +0000 (UTC)
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Subject: [jira] [Commented] (DRILL-4514) Add describe schema <schema_name>
 command
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archived-at: Mon, 23 May 2016 22:21:14 -0000


    [ https://issues.apache.org/jira/browse/DRILL-4514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15297222#comment-15297222 ] 

ASF GitHub Bot commented on DRILL-4514:
---------------------------------------

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

    https://github.com/apache/drill/pull/436#discussion_r64299337
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/store/dfs/WorkspaceConfig.java ---
    @@ -25,23 +25,27 @@
      *  - location which is a path.
      *  - writable flag to indicate whether the location supports creating new tables.
      *  - default storage format for new tables created in this workspace.
    + *  - physicalLocation is full path to workspace
      */
     @JsonIgnoreProperties(value = {"storageformat"})
     public class WorkspaceConfig {
     
       /** Default workspace is a root directory which supports read, but not write. */
    -  public static final WorkspaceConfig DEFAULT = new WorkspaceConfig("/", false, null);
    +  public static final WorkspaceConfig DEFAULT = new WorkspaceConfig("/", false, null, null);
     
       private final String location;
       private final boolean writable;
       private final String defaultInputFormat;
    +  private final String physicalLocation;
     
       public WorkspaceConfig(@JsonProperty("location") String location,
                              @JsonProperty("writable") boolean writable,
    -                         @JsonProperty("defaultInputFormat") String defaultInputFormat) {
    +                         @JsonProperty("defaultInputFormat") String defaultInputFormat,
    +                         @JsonProperty("physicalLocation") String physicalLocation) {
         this.location = location;
         this.writable = writable;
         this.defaultInputFormat = defaultInputFormat;
    +    this.physicalLocation = physicalLocation;
    --- End diff --
    
    WorkspaceConfig already has "location". Why do you prefer adding a new "physicalLocation"? Is it possible to use "location" in stead?


> Add describe schema <schema_name> command
> -----------------------------------------
>
>                 Key: DRILL-4514
>                 URL: https://issues.apache.org/jira/browse/DRILL-4514
>             Project: Apache Drill
>          Issue Type: New Feature
>    Affects Versions: Future
>            Reporter: Arina Ielchiieva
>            Assignee: Arina Ielchiieva
>
> Add describe database <db_name> command which will return directory associated with a database on the fly.
> Syntax:
> describe database <db_name>
> describe schema <schema_name>
> Output:
> {noformat}
>  DESCRIBE SCHEMA xdf.proc;
> +---------------------+----------------------------+
> |    name             | location                   |
> +---------------------+----------------------------+
> | xdf.proc            | maprfs://dl.data/processed |
> +---------------------+----------------------------+
> {noformat}
> Current implementation covers only dfs schema.
> For all other "<INFORMATION UNAVAILABLE>" will be returned.


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