@Override
  public void init(boolean clearPartsCache) {
    Table tempTable = ctx.getTempTableForLoad();
    if (tempTable != null) {
      // tempTable is only set when load is rewritten.
      super.init(clearPartsCache);
      tabNameToTabObject.put(tempTable.getTableName().toLowerCase(), tempTable);
    }
  }
Verifies the file path existence. If the path is a directory, then it is
verified to not be a glob pattern. If the path is a file, then it is
verified to be a valid file name.
ql/src/java/org/apache/hadoop/hive/ql/parse/LoadSemanticAnalyzer.java