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Hang around Big Data Technologies | Happy Hadooping!Happy Hadooping! (by Giri R Varatharajan, Hortonworks Certified Hadoop Pig/Hive Developer,Hadoop Java Developer, Hadoop Administrator.)
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Happy Hadooping! (by Giri R Varatharajan, Hortonworks Certified Hadoop Pig/Hive Developer,Hadoop Java Developer, Hadoop Administrator.)
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Hang around Big Data Technologies | Happy Hadooping! | hadoopist.wordpress.com Reviews
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Happy Hadooping! (by Giri R Varatharajan, Hortonworks Certified Hadoop Pig/Hive Developer,Hadoop Java Developer, Hadoop Administrator.)
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How to Resolve Hive Vertex Issues due to Vertex Failure with Null Pointer Exception!! | My Learning Notes on Big Data!!!
https://hadoopist.wordpress.com/2015/01/29/how-to-resolve-hive-vertex-issues-due-to-vertex-failure-with-null-pointer-exception
My Learning Notes on Big Data! Happy Hadooping and Sparking! January 29, 2015. How to Resolve Hive Vertex Issues due to Vertex Failure with Null Pointer Exception! The use of Hive ROW NUMBER() function may cause Vertex Failure with NullPointerException in Hive 0.13 version. For example when u run below kind of queries in Hive. SELECT F.*, ROW NUMBER () OVER ( PARTITION BY COL1 , COL2, COL3 , COL4 ORDER BY ACTIVE POL PICK DT DESC. ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING ) RNK. Hortonworks...
#GiriRVaratharajan | My Learning Notes on Big Data!!!
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My Learning Notes on Big Data! Happy Hadooping and Sparking! September 15, 2016. PySpark – How to Handle Non-Ascii Characters and connect in a Spark Dataframe? Below code snippet tells you how to convert NonAscii characters to Regular String and develop a table using Spark Data frame. I have created a small udf and register it in pyspark. Please see the code below and output. August 20, 2016. How to Enable WholeStageCodeGen in Spark 2.0. What is WholeStageCodeGen first? 16/08/19 22:26:43 INFO CodeGenerat...
How to create Hive Table Creation and Insert Scripts (hqls) Automatically in < 5 Minutes for around 1000 RDBMS Tables using Python | My Learning Notes on Big Data!!!
https://hadoopist.wordpress.com/2015/06/09/how-to-create-hive-table-creation-and-insert-scripts-automatically-in-5-minutes-for-around-1000-rdbms-tables-using-python
My Learning Notes on Big Data! Happy Hadooping and Sparking! June 9, 2015. How to create Hive Table Creation and Insert Scripts (hqls) Automatically in 5 Minutes for around 1000 RDBMS Tables using Python. Creating Hive tables is really an easy task. But when you really want to create 1000 of tables in Hive based on the Source RDBMS tables and it’s data types think about the Development Scripts Creation and Execution. Good to have Python/Java Knowledge. Knowledge of Hive Internal and External Tables.
How to import BLOB CLOB columns to Hive via Sqoop | My Learning Notes on Big Data!!!
https://hadoopist.wordpress.com/2015/01/05/how-to-import-blob-clob-columns-to-hive-via-sqoop
My Learning Notes on Big Data! Happy Hadooping and Sparking! January 5, 2015. How to import BLOB CLOB columns to Hive via Sqoop. Dmapred.job.queue.name=default. 8211;query “SELECT * FROM tablename WHERE $CONDITIONS”. 8211;map-column-java column1=String,column2=String. 8211;fields-terminated-by ’01’. 8211;split-by id;. Column1/2 — Any CLOB/BLOB column converted to Java STRING value. Click to share on Twitter (Opens in new window). Click to print (Opens in new window). Leave a Reply Cancel reply.
How to Handle Schema Changes/Evolutes in Hive ORC tables like Column Deletions happening at Source DB. | My Learning Notes on Big Data!!!
https://hadoopist.wordpress.com/2015/07/08/how-to-handle-schema-changesevolutes-in-hive-like-column-deletions-happening-at-source-db
My Learning Notes on Big Data! Happy Hadooping and Sparking! July 8, 2015. How to Handle Schema Changes/Evolutes in Hive ORC tables like Column Deletions happening at Source DB. In the EDW world, schema changes is a very frequent activity. But when we have the same data in Hive as part of the Data Lake, it will be hectic when you see read/writes in Hive/HDFS. Create a Table in MYSQL. Create table test.ADDRESS MYSQL. City varchar(50) ;. Insert some Data into it. INSERT INTO test.cc address mysql (clai...
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Hadoop collaboration platform from Beginners to Professionals
Hadoop collaboration platform from Beginners to Professionals. Ques – Ans. How to change the files at arbitrary locations in HDFS? And what are the cons of it? Dear admin please help me. What happens if during the put operation, the block is replicated only once and not to the default replication factor three? What 's the disadvantage of running the NameNode and the DataNode on the same machine? How does a DataNode know the location of the NameNode in a HDFS cluster? Sqoop Import from MySql to Hbase.
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Hang around Big Data Technologies | Happy Hadooping!
Hang around Big Data Technologies. How to Handle Schema Changes/Evolutes in Hive ORC tables like Column additions at the Source DB. Posted by Giri R Varatharajan, Hortonworks Certified Hadoop Pig/Hive Developer,Hadoop Java Developer, Hadoop Administrator. Asymp; Leave a comment. Copy the Original AVSC File to HDFS Location. Hadoop fs -cp /data/raw/oltp/cas/schema/current/CLAIM CENTER.CC ADDRESS.avsc /QA/giri/poc/schemachanges/cas/cc address. Copy the Original AVSC FIle to Local. CREATE EXTERNAL TABLE GRV...
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