public static void main(String[] args) {
List<EqualJoin> ejs = new ArrayList<EqualJoin>();
Column col1t1 = new Column(new Table(null, "t1"), "c1");
Column col1t2 = new Column(new Table(null, "t2"), "c1");
EqualJoin ej = new EqualJoin(col1t1, col1t2);
ej.setLeftSize(100);
ej.setRightSize(200);
ejs.add(ej);
Column col2t2 = new Column(new Table(null, "t2"), "c2");
Column col2t3 = new Column(new Table(null, "t3"), "c2");
ej = new EqualJoin(col2t2, col2t3);
ej.setLeftSize(200);
ej.setRightSize(300);
ejs.add(ej);
Column col3t3 = new Column(new Table(null, "t3"), "c3");
Column col3t4 = new Column(new Table(null, "t4"), "c3");
ej = new EqualJoin(col3t3, col3t4);
ej.setLeftSize(30);
ej.setRightSize(40);
ejs.add(ej);
Column col4t4 = new Column(new Table(null, "t4"), "c4");
Column col4t5 = new Column(new Table(null, "t5"), "c4");
ej = new EqualJoin(col4t4, col4t5);
ej.setLeftSize(40);
ej.setRightSize(50);
ejs.add(ej);
Column col5t5 = new Column(new Table(null, "t5"), "c5");
Column col5t6 = new Column(new Table(null, "t6"), "c5");
ej = new EqualJoin(col5t5, col5t6);
ej.setLeftSize(50);
ej.setRightSize(60);
ejs.add(ej);
// reorder(ejs);
for (EqualJoin j : ejs) System.out.println(j);
}
public JoinManager(List<EqualJoin> joins, Map<String, Operator> operMapIn, File swapDirIn) {
joinedHistory = new HashSet<String>();
joinList = joins;
operMap = operMapIn;
// find and set size
for (EqualJoin ej : joins) {
ej.setLeftSize(operMap.get(ej.getLeftTableName()).getLength());
ej.setRightSize(operMap.get(ej.getRightTableName()).getLength());
}
// move the biggest last, and
// make each of them has an overlap,
// so that easy to pipeline
reorder(joinList);
}