Github user hyunsik commented on a diff in the pull request:
https://github.com/apache/tajo/pull/138#discussion_r17602067
--- Diff:
tajo-core/src/main/java/org/apache/tajo/engine/planner/PlannerUtil.java ---
@@ -762,4 +785,43 @@ public static String buildExplainString(LogicalNode
node) {
return explains.toString();
}
+
+ public static FragmentProto[] getNonZeroLengthDataFiles(TajoConf
tajoConf, TableDesc tableDesc,
+ int page, int
pageSize) throws IOException {
+ Path tablePath = tableDesc.getPath();
+ FileSystem fs = tablePath.getFileSystem(tajoConf);
+
+ List<FileStatus> nonZeroLengthFiles = new ArrayList<FileStatus>();
+ if (fs.exists(tablePath)) {
+ getNonZeroLengthDataFiles(fs, tablePath, nonZeroLengthFiles, page,
pageSize);
+ }
+
+ List<FileFragment> fragments = new ArrayList<FileFragment>();
+ for (FileStatus eachFile: nonZeroLengthFiles) {
+ FileFragment fileFragment = new FileFragment(tableDesc.getName(),
eachFile.getPath(), 0, eachFile.getLen(), null);
+ fragments.add(fileFragment);
+ }
+ return FragmentConvertor.toFragmentProtoArray(fragments.toArray(new
FileFragment[]{}));
+ }
+
+ private static void getNonZeroLengthDataFiles(FileSystem fs, Path path,
List<FileStatus> result,
--- End diff --
Could you please add a brief comment to explain its purpose?
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