// The code that follows has been extracted and simplified from
// the processor.init() and processor.run() methods to handle the
// one join case
List<JoinOperator> operators = new ArrayList<>();
JoinOperator op = new JoinOperator(joins);
operators.add(op);
long leftTable = JoinableBitSet.empty();
long rightTable = JoinableBitSet.empty();
if (joins.getLeft() instanceof TableGroupJoinTree) {
leftTable = processor.getTableBit(joins.getLeft());
}
if (joins.getRight() instanceof TableGroupJoinTree) {
rightTable = processor.getTableBit(joins.getRight());
}
ExpressionTables visitor = new ExpressionTables(processor.getTableBitSets());
//protected void addWhereConditions(ConditionList whereConditions, ExpressionTables visitor) {
Iterator<ConditionExpression> iter = queryGoal.getWhereConditions().iterator();
while (iter.hasNext()) {
ConditionExpression condition = iter.next();
if (condition instanceof ComparisonCondition) {
ComparisonCondition comp = (ComparisonCondition)condition;
long columnTables = columnReferenceTable(comp.getLeft(), processor.getTableBitSets());
if (!JoinableBitSet.isEmpty(columnTables)) {
long rhs = visitor.getTables(comp.getRight());
if (visitor.wasNullTolerant()) continue;
if (!JoinableBitSet.isEmpty(rhs) &&
!JoinableBitSet.overlaps(columnTables, rhs) &&
joins.getFKJoin().getConditions().contains(comp)) {
operators.add(new JoinOperator(comp, columnTables, rhs));
iter.remove();
continue;
}
}
columnTables = columnReferenceTable(comp.getRight(), processor.getTableBitSets());
if (!JoinableBitSet.isEmpty(columnTables)) {
long lhs = visitor.getTables(comp.getLeft());
if (visitor.wasNullTolerant()) continue;
if (!JoinableBitSet.isEmpty(lhs) &&
!JoinableBitSet.overlaps(columnTables, lhs) &&
joins.getFKJoin().getConditions().contains(comp)) {
operators.add(new JoinOperator(comp, columnTables, lhs));
iter.remove();
continue;
}
}
}