@Test fun toNull() { // given data class Person( val name: String?, val job: String?, val age: Int ) val spark = SparkUtil.make() val data = spark.createDataFrame( mutableListOf( Person("null", "a", 25), Person("Bob", "null", 30), Person("null", "null", 35) ), Person::class.java ).toDF() val expected = spark.createDataFrame( mutableListOf( Person(null, "a", 25), Person("Bob", null, 30), Person(n..
https://json8.tistory.com/177 [안드로이드] uses-sdk:minSdkVersion declared in library 에러 해결 방법 원인 : Android SDK 11 버전에서 지원하지 않은 library 사용 수정 방법 : build.gradle minSdkVersion 변경 (appcompat-v7:26.1.0 경우 min SDK 14로 변경 필요) build.gradle 기존 설정 상태 minSdkVersion 11 에러 로그 Manifest mer json8.tistory.com https://progdev.tistory.com/50 flutter.minSdkVersion, flutter.targetSdkVersion가 선언된 위치 defaultConfig { // T..
https://stackoverflow.com/questions/59958294/how-do-i-execute-terraform-actions-without-the-interactive-prompt How do I Execute Terraform Actions Without the Interactive Prompt? How am I able to execute the following command: terraform apply #=> . . . Do you want to perform these actions? Terraform will perform the actions described above. Only 'yes' will be acce... stackoverflow.com
https://aws.amazon.com/ko/blogs/big-data/best-practices-for-successfully-managing-memory-for-apache-spark-applications-on-amazon-emr/ Best practices for successfully managing memory for Apache Spark applications on Amazon EMR | Amazon Web Services May 2022: Post was reviewed for accuracy. Since this post has been published, Amazon EMR has introduced several new features that make it easier to fu..
data -> split chunk -> loop https://www.ibm.com/support/pages/spark-dirver-reported-outofmemoryerror Spark dirver reported OutOfMemoryError Spark dirver reported OutOfMemoryError www.ibm.com
DROP VIEW [ IF EXISTS ] view_identifier https://spark.apache.org/docs/3.0.0-preview2/sql-ref-syntax-ddl-drop-view.html DROP VIEW - Spark 3.0.0-preview2 Documentation You are using an outdated browser. Upgrade your browser today or install Google Chrome Frame to better experience this site. Overview Programming Guides API Docs Deploying More v3.0.0-preview2 --> spark.apache.org
https://eyeballs.tistory.com/245 [Spark3] Adaptive Query Execution databricks 의 Adaptive Query Execution: Speeding Up Spark SQL at Runtime 을 기반으로 함. https://databricks.com/blog/2020/05/29/adaptive-query-execution-speeding-up-spark-sql-at-runtime.html 해당 포스트는 위 링크의 내용을 (모자란 실 eyeballs.tistory.com
https://stackoverflow.com/questions/52058565/spark-sql-cbo-enabled-true-with-hive-table spark.sql.cbo.enabled=true with Hive table In Spark 2.2 the Cost Based Optimizer option has been enabled. The documentation appears to be saying that we need to analyze the tables in Spark before enabling this option. I would like to know i... stackoverflow.com
https://towardsdatascience.com/demystifying-joins-in-apache-spark-38589701a88e Demystifying Joins in Apache Spark This story is exclusively dedicated to the Join operation in Apache Spark, giving you an overall perspective of the foundation on which… towardsdatascience.com https://yeo0.tistory.com/entry/Spark-BroadCast-Hash-JoinBHJ-Shuffle-Sort-Merge-JoinSMJ [Spark] BroadCast Hash Join(BHJ) / Sh..
https://stackoverflow.com/questions/60645256/how-do-you-get-batches-of-rows-from-spark-using-pyspark How do you get batches of rows from Spark using pyspark I have a Spark RDD of over 6 billion rows of data that I want to use to train a deep learning model, using train_on_batch. I can't fit all the rows into memory so I would like to get 10K or so at a... stackoverflow.com https://www.tabnine.co..
spark.conf.set("spark.sql.autoBroadcastJoinThreshold", -1) sql("select * from table_withNull where id not in (select id from tblA_NoNull)").explain(true) not exists를 사용하면 쿼리가 SortMergeJoin과 함께 실행됩니다. https://www.bigdatainrealworld.com/how-does-broadcast-nested-loop-join-work-in-spark/ How does Broadcast Nested Loop Join work in Spark? Broadcast Nested Loop join works by broadcasting one of the e..
object RestUtil : Loggable { const val RETRIES = 3 const val TIMEOUT = 5 * 60 * 1000 private const val MAX_BODY_SIZE = 0 private const val IGNORE_CONTENT_TYPE = true fun connection( url: String, json: String, headers: Map = emptyMap(), data: Map? = emptyMap(), timeout: Int? = TIMEOUT ): Connection { var connection = Jsoup.connect(url) headers.forEach { connection = connection.header(it.key, it.v..
I would recommend string if at all possible - You are correct that it is very handy to not be limited by a length specifier. Even if the data coming in is only Varchar(30) in length, your ELT/ETL processing will not fail if you send in 31 characters while using a string datatype. https://community.cloudera.com/t5/Support-Questions/Hive-STRING-vs-VARCHAR-Performance/m-p/157939 Hive STRING vs VARC..
sudo yum install java-11-amazon-corretto https://docs.aws.amazon.com/ko_kr/corretto/latest/corretto-11-ug/amazon-linux-install.html Amazon Corretto 11 설치 지침 - Amazon Corretto 이 페이지에 작업이 필요하다는 점을 알려 주셔서 감사합니다. 실망시켜 드려 죄송합니다. 잠깐 시간을 내어 설명서를 향상시킬 수 있는 방법에 대해 말씀해 주십시오. docs.aws.amazon.com
https://stackoverflow.com/questions/68878925/in-spark-how-to-check-the-date-format In Spark, how to check the date format? How can we check the date format in below code. DF = DF.withColumn("DATE", to_date(trim(col("DATE")), "yyyyMMdd")) Error: Caused by: java.time.format. stackoverflow.com
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