Triggers 删除操作时的Cassandra 3触发器

我试图在Cassandra 3上实现一个触发器，通过实现

 public Collection<Mutation> augment(Partition partition)

公共集合扩充（分区）

在

ITrigger

界面上，但我无法区分更新和删除操作

---

如何捕获该操作是删除操作？

以下是如何捕获所有类型的删除

public Collection<Mutation> augment(Partition partition) {
    if(partition.partitionLevelDeletion().isLive()) {
        UnfilteredRowIterator it = partition.unfilteredIterator();
        while (it.hasNext()) {
            Unfiltered unfiltered = it.next();
            switch (unfiltered.kind()) {
                case ROW:
                    Row row = (Row) unfiltered;

                    if (!row.deletion().isLive()) {
                        // Row deletion
                    }

                    for (Cell cell : row.cell()) {
                        if (cell.isTombstone() {
                            // Cell deletion
                        } else {
                            // Insert or Update
                        }  
                    }
                    break;
                case RANGE_TOMBSTONE_MARKER:
                    // Range Deletion
                    break;
            }
        }
    } else {
        // Partition Level Deletion
    }
}

这里pk是分区键，ck是集群键

分区级删除：

DELETE from kv WHERE pk = 1;

DELETE from kv WHERE pk = 1 AND ck > 10;

范围删除：

DELETE from kv WHERE pk = 1;

DELETE from kv WHERE pk = 1 AND ck > 10;

行删除：

 DELETE from kv WHERE pk = 1 AND ck = 10;

和单元格删除：

DELETE d from kv WHERE pk = 1 AND ck = 10;

---

以下是如何捕获所有类型的删除

public Collection<Mutation> augment(Partition partition) {
    if(partition.partitionLevelDeletion().isLive()) {
        UnfilteredRowIterator it = partition.unfilteredIterator();
        while (it.hasNext()) {
            Unfiltered unfiltered = it.next();
            switch (unfiltered.kind()) {
                case ROW:
                    Row row = (Row) unfiltered;

                    if (!row.deletion().isLive()) {
                        // Row deletion
                    }

                    for (Cell cell : row.cell()) {
                        if (cell.isTombstone() {
                            // Cell deletion
                        } else {
                            // Insert or Update
                        }  
                    }
                    break;
                case RANGE_TOMBSTONE_MARKER:
                    // Range Deletion
                    break;
            }
        }
    } else {
        // Partition Level Deletion
    }
}

这里pk是分区键，ck是集群键

分区级删除：

DELETE from kv WHERE pk = 1;

DELETE from kv WHERE pk = 1 AND ck > 10;

范围删除：

DELETE from kv WHERE pk = 1;

DELETE from kv WHERE pk = 1 AND ck > 10;

行删除：

 DELETE from kv WHERE pk = 1 AND ck = 10;

和单元格删除：

DELETE d from kv WHERE pk = 1 AND ck = 10;

---

谢谢你。当我运行命令“delete from my_table where id=22”时，会调用哪一个？id是分区键？如果是，那么它将是分区级删除您的意思是在这种情况下调用else“else{//partition Level Deletion}”？更新操作中的“else”也会被调用吗？只有当它是delete时，代码

else{//Partition Level deletation}

才会首先调用Insert或update或Range或delete（当您指定集群键或null Insert时）操作，如果它将调用Ashraful。当我运行命令“delete from my_table where id=22”时，会调用哪一个？id是分区键？如果是，那么它将是分区级删除您的意思是在这种情况下调用else“else{//partition Level Deletion}”？并且“else”也会在更新操作中调用吗？只有当它是delete时，代码

else{//Partition Level deletation}

才会调用Insert或update或Range或delete（当您指定集群键或null Insert时）操作，如果将调用