/**
* Generate the code.
*
* @exception StandardException Thrown on error
*/
public void generate(ActivationClassBuilder acb, MethodBuilder mb) throws StandardException {
/* Get the next ResultSet #, so that we can number this ResultSetNode, its
* ResultColumnList and ResultSet.
*/
assignResultSetNumber();
// Get our final cost estimate based on the child estimates.
costEstimate = getFinalCostEstimate();
// build up the tree.
/* Generate the SetOpResultSet. Arguments:
* 1) expression for left child ResultSet
* 2) expression for right child ResultSet
* 3) activation
* 4) resultSetNumber
* 5) estimated row count
* 6) estimated cost
* 7) opType
* 8) all
* 9) intermediateOrderByColumns saved object index
* 10) intermediateOrderByDirection saved object index
* 11) intermediateOrderByNullsLow saved object index
*/
acb.pushGetResultSetFactoryExpression(mb); // instance for getSetOpResultSet
getLeftResultSet().generate(acb, mb);
getRightResultSet().generate(acb, mb);
acb.pushThisAsActivation(mb);
mb.push(resultSetNumber);
mb.push(costEstimate.getEstimatedRowCount());
mb.push(costEstimate.getEstimatedCost());
mb.push(getOpType());
mb.push(all);
mb.push(getCompilerContext().addSavedObject(intermediateOrderByColumns));
mb.push(getCompilerContext().addSavedObject(intermediateOrderByDirection));
mb.push(getCompilerContext().addSavedObject(intermediateOrderByNullsLow));
mb.callMethod(
VMOpcode.INVOKEINTERFACE, (String) null, "getSetOpResultSet", ClassName.NoPutResultSet, 11);
} // end of generate
