Method substituteImpl

fe/src/main/java/org/apache/impala/analysis/Expr.java:1216–1224

Recursive method that performs the actual substitution for try/substitute() while removing implicit casts. The implicit cast removal is in the CastExpr class which overrides this method. Resets the analysis state in all non-SlotRef expressions. Exprs that have non-child exprs which should be affecte

(ExprSubstitutionMap smap, Analyzer analyzer)

   * well.
   */
  protected Expr substituteImpl(ExprSubstitutionMap smap, Analyzer analyzer) {
    if (smap != null) {
      Expr substExpr = smap.get(this);
      if (substExpr != null) return substExpr.clone();
    }
    substituteImplOnChildren(smap, analyzer);
    resetAnalysisState();
    return this;
  }

  protected final void substituteImplOnChildren(ExprSubstitutionMap smap,
      Analyzer analyzer) {