public InSubQExpression(Val val,
    SubQ sub) 
{
        _val = val;
        _sub = sub;
}

Constructor. Supply the value to test and the subquery.

 public  void acceptVisit(ExpressionVisitor visitor) 
{
        visitor.enter(this);
        _val.acceptVisit(visitor);
        _sub.acceptVisit(visitor);
        visitor.exit(this);
}

 public  void appendTo(Select sel,
    ExpContext ctx,
    ExpState state,
    SQLBuffer buf) 
{
        InSubQExpState istate = (InSubQExpState) state;
        _sub.calculateValue(sel, ctx, istate.subqState, null, null);
        _val.calculateValue(sel, ctx, istate.valueState, null, null);
        _val.appendTo(sel, ctx, istate.valueState, buf, 0);
        buf.append(" IN ");
        _sub.appendTo(sel, ctx, istate.valueState, buf, 0);
}

 public ExpState initialize(Select sel,
    ExpContext ctx,
    Map contains) 
{
        ExpState subqState = _sub.initialize(sel, ctx, 0);
        ExpState valueState = _val.initialize(sel, ctx, 0);
        return new InSubQExpState(valueState.joins, subqState, valueState);
}

 public  void selectColumns(Select sel,
    ExpContext ctx,
    ExpState state,
    boolean pks) 
{
        InSubQExpState istate = (InSubQExpState) state;
        _sub.selectColumns(sel, ctx, istate.subqState, pks);
        _val.selectColumns(sel, ctx, istate.valueState, true);
}