Github user paul-rogers commented on a diff in the pull request:

    https://github.com/apache/drill/pull/756#discussion_r102805162
  
    --- Diff: 
exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/profile/TableBuilder.java
 ---
    @@ -33,62 +33,91 @@
       private int w = 0;
       private int width;
     
    -  public TableBuilder(final String[] columns) {
    +  public TableBuilder(final String[] columns, final String[] 
columnTooltip) {
         sb = new StringBuilder();
         width = columns.length;
     
         format.setMaximumFractionDigits(3);
     
         sb.append("<table class=\"table table-bordered text-right\">\n<tr>");
    -    for (final String cn : columns) {
    -      sb.append("<th>" + cn + "</th>");
    +    for (int i = 0; i < columns.length; i++) {
    +      String cn = columns[i];
    +      String ctt = "";
    +      if (columnTooltip != null) {
    +        String tooltip = columnTooltip[i];
    +        if (tooltip != null) {
    +          ctt = " title=\""+tooltip+"\" style=\"color:#00008B;\"";
    +        }
    +      }
    +      sb.append("<th" + ctt + ">" + cn + "</th>");
         }
         sb.append("</tr>\n");
       }
     
    -  public void appendCell(final String s, final String link) {
    +  public void appendCell(final String s, final String link, final String 
titleText) {
         if (w == 0) {
           sb.append("<tr>");
         }
    -    sb.append(String.format("<td>%s%s</td>", s, link != null ? link : ""));
    +    if (titleText != null && titleText.length() > 0) {
    +      sb.append(String.format("<td title=\""+titleText+"\">%s%s</td>", s, 
link != null ? link : ""));
    +    } else {
    +      sb.append(String.format("<td>%s%s</td>", s, link != null ? link : 
""));
    +    }
         if (++w >= width) {
           sb.append("</tr>\n");
           w = 0;
    +    }  }
    +
    +  public void appendCellWithBgColor(final String s, final String link, 
final String titleText, final String backgroundColor) {
    +    if (w == 0) {
    +      sb.append("<tr bgcolor=\""+backgroundColor+"\">");
         }
    -  }
    +    if (titleText != null && titleText.length() > 0) {
    +      sb.append(String.format("<td title=\""+titleText+"\">%s%s</td>", s, 
link != null ? link : ""));
    +    } else {
    +      sb.append(String.format("<td>%s%s</td>", s, link != null ? link : 
""));
    --- End diff --
    
    Seems odd. If this is truly a link, you need the following;
    
    ```
    <a href="link url">title text</a>
    ```
    
    Maybe the "link" is something else?


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