Method substitute

fe/src/main/java/org/apache/impala/analysis/Expr.java:1179–1186

Returns an analyzed clone of 'this' with exprs substituted according to smap. Removes implicit casts and analysis state while cloning/substituting exprs within this tree, such that the returned result has minimal implicit casts and types. Expects the analysis of the post-substitution expr to succeed

(ExprSubstitutionMap smap, Analyzer analyzer,
      boolean preserveRootType)

   * the type of 'this'.
   */
  public Expr substitute(ExprSubstitutionMap smap, Analyzer analyzer,
      boolean preserveRootType) {
    try {
      return trySubstitute(smap, analyzer, preserveRootType);
    } catch (Exception e) {
      throw new IllegalStateException("Failed analysis after expr substitution.", e);
    }
  }

  public static List<Expr> trySubstituteList(Iterable<? extends Expr> exprs,
      ExprSubstitutionMap smap, Analyzer analyzer, boolean preserveRootTypes)