Examples with TwoTableComparator com.actiontech.dble.backend.mysql.nio.handler.util.TwoTableComparator used on opensource projects

Example 1 with TwoTableComparator

use of com.actiontech.dble.backend.mysql.nio.handler.util.TwoTableComparator in project dble by actiontech.

the class JoinHandler method ownThreadJob.

@Override
protected void ownThreadJob(Object... objects) {
    MySQLConnection conn = (MySQLConnection) objects[0];
    LocalResult leftLocal = null, rightLocal = null;
    try {
        Comparator<RowDataPacket> joinComparator = new TwoTableComparator(leftFieldPackets, rightFieldPackets, leftOrders, rightOrders, this.isAllPushDown(), this.type());
        // logger.debug("merge Join start");
        leftLocal = takeFirst(leftQueue);
        rightLocal = takeFirst(rightQueue);
        while (true) {
            if (terminate.get())
                return;
            RowDataPacket leftRow = leftLocal.getLastRow();
            RowDataPacket rightRow = rightLocal.getLastRow();
            if (leftRow.getFieldCount() == 0) {
                break;
            }
            if (rightRow.getFieldCount() == 0) {
                if (isLeftJoin) {
                    if (connectLeftAndNull(leftLocal, conn))
                        break;
                    leftLocal = takeFirst(leftQueue);
                    continue;
                } else {
                    break;
                }
            }
            int rs = joinComparator.compare(leftRow, rightRow);
            if (rs < 0) {
                if (isLeftJoin) {
                    if (connectLeftAndNull(leftLocal, conn))
                        break;
                    leftLocal = takeFirst(leftQueue);
                    continue;
                } else {
                    leftLocal.close();
                    leftLocal = takeFirst(leftQueue);
                }
            } else if (rs > 0) {
                rightLocal.close();
                rightLocal = takeFirst(rightQueue);
            } else {
                if (connectLeftAndRight(leftLocal, rightLocal, conn))
                    break;
                leftLocal = takeFirst(leftQueue);
                rightLocal = takeFirst(rightQueue);
            }
        }
        nextHandler.rowEofResponse(null, isLeft, conn);
        HandlerTool.terminateHandlerTree(this);
    } catch (Exception e) {
        String msg = "join thread error, " + e.getLocalizedMessage();
        logger.info(msg, e);
        session.onQueryError(msg.getBytes());
    } finally {
        if (leftLocal != null)
            leftLocal.close();
        if (rightLocal != null)
            rightLocal.close();
    }
}

Example 2 with TwoTableComparator

use of com.actiontech.dble.backend.mysql.nio.handler.util.TwoTableComparator in project dble by actiontech.

the class NotInHandler method ownThreadJob.

@Override
protected void ownThreadJob(Object... objects) {
    MySQLConnection conn = (MySQLConnection) objects[0];
    LocalResult leftLocal = null, rightLocal = null;
    try {
        Comparator<RowDataPacket> notInComparator = new TwoTableComparator(leftFieldPackets, rightFieldPackets, leftOrders, rightOrders, this.isAllPushDown(), this.type());
        leftLocal = takeFirst(leftQueue);
        rightLocal = takeFirst(rightQueue);
        while (true) {
            RowDataPacket leftRow = leftLocal.getLastRow();
            RowDataPacket rightRow = rightLocal.getLastRow();
            if (leftRow.getFieldCount() == 0) {
                break;
            }
            if (rightRow.getFieldCount() == 0) {
                sendLeft(leftLocal, conn);
                leftLocal.close();
                leftLocal = takeFirst(leftQueue);
                continue;
            }
            int rs = notInComparator.compare(leftRow, rightRow);
            if (rs < 0) {
                sendLeft(leftLocal, conn);
                leftLocal.close();
                leftLocal = takeFirst(leftQueue);
                continue;
            } else if (rs > 0) {
                rightLocal.close();
                rightLocal = takeFirst(rightQueue);
            } else {
                // because not in, if equal left should move to next value
                leftLocal.close();
                rightLocal.close();
                leftLocal = takeFirst(leftQueue);
                rightLocal = takeFirst(rightQueue);
            }
        }
        nextHandler.rowEofResponse(null, isLeft, conn);
        HandlerTool.terminateHandlerTree(this);
    } catch (Exception e) {
        String msg = "notIn thread error, " + e.getLocalizedMessage();
        LOGGER.info(msg, e);
        session.onQueryError(msg.getBytes());
    } finally {
        if (leftLocal != null)
            leftLocal.close();
        if (rightLocal != null)
            rightLocal.close();
    }
}