fe/src/main/java/com/cloudera/impala/planner/MergeNode.java
/**
   * Add a child tree plus its corresponding resolved resultExprs.
   */
Add a child tree plus its corresponding resolved resultExprs.
Add a child tree plus its corresponding resolved resultExprs .
public void addChild(PlanNode node, List<Expr> baseTblResultExprs) {
    super.addChild(node);
    resultExprLists_.add(baseTblResultExprs);
    if (baseTblResultExprs != null) {
      Preconditions.checkState(tupleIds_.size() == 1);
    }
  }
public void addChild ( PlanNode node , List < Expr > baseTblResultExprs ) { super . addChild ( node ) ; resultExprLists_ . add ( baseTblResultExprs ) ; if ( baseTblResultExprs != null ) { Preconditions . checkState ( tupleIds_ . size ( ) == 1 ) ; } }
Add a child tree plus its corresponding resolved resultExprs.
Add a child tree plus its corresponding resolved resultExprs .
// if we're materializing output, we can only do that into a single // output tuple