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From: adeneche <git@git.apache.org>
To: dev@drill.apache.org
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References: <git-pr-270-drill@git.apache.org>
In-Reply-To: <git-pr-270-drill@git.apache.org>
Subject: [GitHub] drill pull request: DRILL-2618: handle queries over empty
 folders ...
Content-Type: text/plain
Message-Id: <20151120032748.7637FE1809@git1-us-west.apache.org>
Date: Fri, 20 Nov 2015 03:27:48 +0000 (UTC)

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

    https://github.com/apache/drill/pull/270#discussion_r45432737
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/store/dfs/FileSelection.java ---
    @@ -190,22 +136,40 @@ private static String commonPath(FileStatus... paths) {
             break;
           }
         }
    -    URI oneURI = paths[0].getPath().toUri();
    +    URI oneURI = statuses.get(0).getPath().toUri();
         return new Path(oneURI.getScheme(), oneURI.getAuthority(), commonPath).toString();
       }
     
    -  public static FileSelection create(DrillFileSystem fs, String parent, String path) throws IOException {
    -    Path p = new Path(parent,removeLeadingSlash(path));
    -    FileStatus[] status = fs.globStatus(p);
    -    if (status == null || status.length == 0) {
    +  public static FileSelection create(final DrillFileSystem fs, final String parent, final String path) throws IOException {
    +    final Path combined = new Path(parent, removeLeadingSlash(path));
    +    final FileStatus[] statuses = fs.globStatus(combined);
    +    if (statuses == null) {
    --- End diff --
    
    if statuses is empty (but not null), we will call create below passing an empty statuses list and a null files list which will cause the precondition of the method to fail, right ?


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