I am new to spark/scala. I am trying to read some data from a hive table to a spark dataframe and then add a column based on some condition. Here is my code:
val DF = hiveContext.sql("select * from (select * from test_table where partition_date='2017-11-22') a JOIN (select max(id) as bid from test_table where partition_date='2017-11-22' group by at_id) b ON a.id=b.bid")
def dateDiff(partition_date: org.apache.spark.sql.Column, item_due_date: org.apache.spark.sql.Column): Long ={
ChronoUnit.DAYS.between(LocalDate.parse(partition_date.toString()), LocalDate.parse(item_due_date.toString))
}
val finalDF = DF.withColumn("status",
when(col("past_due").equalTo(1) && !(col("item_due_date").equalTo(null) || col("item_due_date").equalTo("NULL") || col("item_due_date").equalTo("null")) && (dateDiff(col("partition_date"),col("item_due_date")) < 0) && !(col("item_decision").equalTo(null) || col("item_decision").equalTo("NULL") || col("item_decision").equalTo("null")), "approved")
.when(col("past_due").equalTo(1) && !(col("item_due_date").equalTo(null) || col("item_due_date").equalTo("NULL") || col("item_due_date").equalTo("null")) && (dateDiff(col("partition_date"),col("item_due_date")) < 0) && (col("item_decision").equalTo(null) || col("item_decision").equalTo("NULL") || col("item_decision").equalTo("null")), "pending")
.when(col("past_due").equalTo(1) && !(col("item_due_date").equalTo(null) || col("item_due_date").equalTo("NULL") || col("item_due_date").equalTo("null")) && (dateDiff(col("partition_date"),col("item_due_date")) >= 0), "expired")
.otherwise("null"))
dateDiff
is a function that calculates the difference between partition_date
and item_due_date
, which are columns in DF
. I am trying to add a new column to DF
by using when
and otherwise
which uses the dateDiff
to get the difference between dates.
Now, when I run the above code, I get the following error: org.threeten.bp.format.DateTimeParseException: Text 'partition_date' could not be parsed at index 0
I believe the value of the column partition_date
is not being converted to a String to be parsed as a date. Is this what's happening? If yes, how do I cast the column value to a String ?
Below is the schema of the columns I am using from the DF
:
|-- item_due_date: string (nullable = true)
|-- past_due: integer (nullable = true)
|-- item_decision: string (nullable = true)
|-- partition_date: string (nullable = true)
A data sample of the columns I am using from the DF
:
+--------+-------------+-------------+--------------+
|past_due|item_due_date|item_decision|partition_date|
+--------+-------------+-------------+--------------+
| 1| 0001-01-14| null| 2017-11-22|
| 1| 0001-01-14| Mitigate| 2017-11-22|
| 1| 0001-01-14| Mitigate| 2017-11-22|
| 1| 0001-01-14| Mitigate| 2017-11-22|
| 0| 2018-03-18| null| 2017-11-22|
| 1| 2016-11-30| null| 2017-11-22|
+--------+-------------+-------------+--------------+
I also tried using a custom UDF:
def status(past_due: Int, item_decision: String, maxPartitionDate: String, item_due_date: String): String = {
if (past_due == 1 && item_due_date != "NULL") {
if (ChronoUnit.DAYS.between(LocalDate.parse(maxPartitionDate.trim), LocalDate.parse(item_due_date.trim)) < 0) {
if (item_decision != "NULL") "pending"
else "approved"
} else "expired"
} else "NULL"
}
val statusUDF = sqlContext.udf.register("statusUDF", status _)
val DF2 = DF.withColumn("status", statusUDF(DF("past_due"),DF("item_decision"),DF("partition_date"),DF("item_due_date")))
DF2.show()
And it throws the following error at the DF2.show
statement, everytime:
Container exited with a non-zero exit code 50
Driver stacktrace:
at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1433)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1421)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1420)
at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1420)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:799)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:799)
at scala.Option.foreach(Option.scala:236)
at org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:799)
at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1644)
at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1603)
at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1592)
at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48)
at org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:620)
at org.apache.spark.SparkContext.runJob(SparkContext.scala:1844)
at org.apache.spark.SparkContext.runJob(SparkContext.scala:1857)
at org.apache.spark.SparkContext.runJob(SparkContext.scala:1870)
at org.apache.spark.sql.execution.SparkPlan.executeTake(SparkPlan.scala:212)
at org.apache.spark.sql.execution.Limit.executeCollect(basicOperators.scala:165)
at org.apache.spark.sql.execution.SparkPlan.executeCollectPublic(SparkPlan.scala:174)
at org.apache.spark.sql.DataFrame$$anonfun$org$apache$spark$sql$DataFrame$$execute$1$1.apply(DataFrame.scala:1499)
at org.apache.spark.sql.DataFrame$$anonfun$org$apache$spark$sql$DataFrame$$execute$1$1.apply(DataFrame.scala:1499)
at org.apache.spark.sql.execution.SQLExecution$.withNewExecutionId(SQLExecution.scala:53)
at org.apache.spark.sql.DataFrame.withNewExecutionId(DataFrame.scala:2086)
at org.apache.spark.sql.DataFrame.org$apache$spark$sql$DataFrame$$execute$1(DataFrame.scala:1498)
at org.apache.spark.sql.DataFrame.org$apache$spark$sql$DataFrame$$collect(DataFrame.scala:1505)
at org.apache.spark.sql.DataFrame$$anonfun$head$1.apply(DataFrame.scala:1375)
at org.apache.spark.sql.DataFrame$$anonfun$head$1.apply(DataFrame.scala:1374)
at org.apache.spark.sql.DataFrame.withCallback(DataFrame.scala:2099)
at org.apache.spark.sql.DataFrame.head(DataFrame.scala:1374)
at org.apache.spark.sql.DataFrame.take(DataFrame.scala:1456)
at org.apache.spark.sql.DataFrame.showString(DataFrame.scala:170)
at org.apache.spark.sql.DataFrame.show(DataFrame.scala:350)
at org.apache.spark.sql.DataFrame.show(DataFrame.scala:311)
at org.apache.spark.sql.DataFrame.show(DataFrame.scala:319)
at driver$.main(driver.scala:109)
at driver.main(driver.scala)
Any help would be appreciated. Thank you!
You can simply use datediff
inbuilt function to check for the days difference between two columns. you don't need to write your function or udf
function. And when function is also modified than yours
import org.apache.spark.sql.functions._
val finalDF = DF.withColumn("status",
when(col("past_due").equalTo(1) && col("item_due_date").isNotNull && !(lower(col("item_due_date")).equalTo("null")) && (datediff(col("partition_date"),col("item_due_date")) < 0) && col("item_decision").isNotNull && !(lower(col("item_decision")).equalTo("null")), "approved")
.otherwise(when(col("past_due").equalTo(1) && col("item_due_date").isNotNull && !(lower(col("item_due_date")).equalTo("null")) && (datediff(col("partition_date"),col("item_due_date")) < 0) && (col("item_decision").isNull || lower(col("item_decision")).equalTo("null")), "pending")
.otherwise(when(col("past_due").equalTo(1) && col("item_due_date").isNotNull && !(lower(col("item_due_date")).equalTo("null")) && (datediff(col("partition_date"),col("item_due_date")) >= 0), "expired")
.otherwise("null"))))
This logic will convert the dataframe
+--------+-------------+-------------+--------------+
|past_due|item_due_date|item_decision|partition_date|
+--------+-------------+-------------+--------------+
|1 |2017-12-14 |null |2017-11-22 |
|1 |2017-12-14 |Mitigate |2017-11-22 |
|1 |0001-01-14 |Mitigate |2017-11-22 |
|1 |0001-01-14 |Mitigate |2017-11-22 |
|0 |2018-03-18 |null |2017-11-22 |
|1 |2016-11-30 |null |2017-11-22 |
+--------+-------------+-------------+--------------+
with addition of status
column as
+--------+-------------+-------------+--------------+--------+
|past_due|item_due_date|item_decision|partition_date|status |
+--------+-------------+-------------+--------------+--------+
|1 |2017-12-14 |null |2017-11-22 |pending |
|1 |2017-12-14 |Mitigate |2017-11-22 |approved|
|1 |0001-01-14 |Mitigate |2017-11-22 |expired |
|1 |0001-01-14 |Mitigate |2017-11-22 |expired |
|0 |2018-03-18 |null |2017-11-22 |null |
|1 |2016-11-30 |null |2017-11-22 |expired |
+--------+-------------+-------------+--------------+--------+
I hope the answer is helpful
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.