How to integrate Apache Spark with MySQL for reading database tables as a spark dataframe? [closed]
From pySpark, it work for me :
dataframe_mysql = mySqlContext.read.format("jdbc").options( url="jdbc:mysql://localhost:3306/my_bd_name", driver = "com.mysql.jdbc.Driver", dbtable = "my_tablename", user="root", password="root").load()
With spark 2.0.x,you can use DataFrameReader and DataFrameWriter.Use SparkSession.read to access DataFrameReader and use Dataset.write to access DataFrameWriter.
Suppose using spark-shell.
read example
val prop=new java.util.Properties()prop.put("user","username")prop.put("password","yourpassword")val url="jdbc:mysql://host:port/db_name"val df=spark.read.jdbc(url,"table_name",prop) df.show()
read example 2
val jdbcDF = spark.read .format("jdbc") .option("url", "jdbc:mysql:dbserver") .option("dbtable", "schema.tablename") .option("user", "username") .option("password", "password") .load()
from spark doc
read example3
If you want to read data from a query result rather than a table.
val sql="""select * from db.your_table where id>1"""val jdbcDF = spark.read .format("jdbc") .option("url", "jdbc:mysql:dbserver") .option("dbtable", s"( $sql ) t") .option("user", "username") .option("password", "password") .load()
write example
import org.apache.spark.sql.SaveModeval prop=new java.util.Properties()prop.put("user","username")prop.put("password","yourpassword")val url="jdbc:mysql://host:port/db_name"//df is a dataframe contains the data which you want to write.df.write.mode(SaveMode.Append).jdbc(url,"table_name",prop)
Using Scala, this worked for me :Use the commands below:
sudo -u root spark-shell --jars /mnt/resource/lokeshtest/guava-12.0.1.jar,/mnt/resource/lokeshtest/hadoop-aws-2.6.0.jar,/mnt/resource/lokeshtest/aws-java-sdk-1.7.3.jar,/mnt/resource/lokeshtest/mysql-connector-java-5.1.38/mysql-connector-java-5.1.38/mysql-connector-java-5.1.38-bin.jar --packages com.databricks:spark-csv_2.10:1.2.0import org.apache.spark.sql.SQLContextval sqlcontext = new org.apache.spark.sql.SQLContext(sc)val dataframe_mysql = sqlcontext.read.format("jdbc").option("url", "jdbc:mysql://Public_IP:3306/DB_NAME").option("driver", "com.mysql.jdbc.Driver").option("dbtable", "tblage").option("user", "sqluser").option("password", "sqluser").load()dataframe_mysql.show()