如何将变量传递给SQL字符串

Question

我有一个spark sql查询，它接受的值很长。

Dataset getQuery = spark.sql("select * from trafficdata where message_time between 1486036800000 and 1486108800000 ")

我想把这个时间变成像

这样的变量

Long val1 = 1486036800000
Long val2 = 1486108800000
Dataset getQuery = spark.sql("select * from trafficdata where message_time between $val1 and $val2 ")

我尝试使用$val1，但它不起作用。任何人都可以建议，如何在java中做到这一点？

Answer 1

我认为您应该将查询编写为

"select * from trafficdata where message_time between '" + val1 + "' and '" + val2 + "'"

Answer 2

尝试这样：

getQuery = spark.sql(String.format("select * from trafficdata where message_time between %d and %d ", val1, val2));