Method clone

fe/src/main/java/org/apache/impala/analysis/Expr.java:1273–1274

Creates a deep copy of this expr including its analysis state. The method is abstract in this class to force new Exprs to implement it.

()

   * abstract in this class to force new Exprs to implement it.
   */
  @Override
  public abstract Expr clone();

  /**
   * Create a deep copy of 'l'. The elements of the returned list are of the same