Pentaho- if min datetime group by a condition, set another field value to value1

Question

我是 Pentaho 的新手...有人可以帮我解决以下问题吗...

我的数据已经排序如下：

session, log_time, flag

1111, 2017-05-17 11:11:10,0

1111,2017-05-17 11:11:11,0

1111,2017-05-17 11:11:12,0

1111,2017-05-17 11:11:13,0

2222,2017-05-17 11:11:10,0

2222,2017-05-17 11:11:13,0

2222,2017-05-17 11:11:15,0

当会话分组最小 log_time 时，如何将标志值设置为 1？我希望得到如下结果：

session, log_time, flag

1111, 2017-05-17 11:11:10,**1**

1111,2017-05-17 11:11:11,0

1111,2017-05-17 11:11:12,0

1111,2017-05-17 11:11:13,0

2222,2017-05-17 11:11:10,**1**

2222,2017-05-17 11:11:13,0

2222,2017-05-17 11:11:15,0

Answer 1

只需运行通过 Add value fields changing sequence 即可得到以下信息：

然后您只能对 "sequence_value" 为 1 的值进行操作。请注意，该步骤需要排序的输入。

Pentaho- if min datetime group by a condition, set another field value to value1

Pentaho- if min datetime group by a condition, set another field value to value1

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pentaho