@Override
  public void analyzeInternal(ASTNode ast) throws SemanticException {
    if (ctx.getTempTableForLoad() != null) {
      super.analyzeInternal(ast);
    } else {
      analyzeLoad(ast);
    }
  }
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