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我有一个cassandra keyspace和表,我正在查询数据以写入另一个keyspace/table。我的代码如下:saveToCassandra保存整个表而不是一行
val test = sc.cassandraTable("model","data")
.where("id = 9999999")
.select("id","cl1","cl2","data")
.filter(row => row.getString("data") == "Hello")
test.saveToCassandra("model","dataspark",SomeColumns("id","cl1","cl2","data"))
问题是,由于某种原因,它是写的一切,是在model.data到model.dataspark,而不只是我在我的VAL测试变量指定的。我必须有一些语法或错误。
如果我.collect
并做一个.foreach(println)
它只显示如预期的查询单个条目。我的saveToCassandra语句必须是错误的,但我不确定它有什么问题。
我试图用一个案例类和相同的结果,整个事情:
case class Record(id: Int, cl1: Int, cl2: Int, data: Option[String])
val test = sc.cassandraTable[Record]("model","data")
.where("id = 9999999").select("id","cl1","cl2","data")
test.saveToCassandra("model","dataspark", SomeColumns("id","cl1","cl2","data"))