Voglio importare una tabella da SQL Server per avviare locale utilizzando il driver JDBC ed eseguire spark sql su di esso. Ho scaricato sqljdbc per SQL Server e aggiunto questa linea al spark-env.sh nella directory conf:Importazione dati da server sql per l'accensione locale
SPARK_CLASSPATH= "C:/Program Files/Microsoft SQL Server/sqljdbc_4.0/enu/sqljdbc4.jar" ./bin/spark-shell
Come suggerito da here
E utilizzare questa linea per caricare i dati
df = sqlContext.load(source="jdbc", url="jdbc:sqlserver:dd", dbtable="Reporting.dbo.datatable")
Tuttavia, si genera un errore come:
Py4JJavaError: An error occurred while calling o28.load.
: java.sql.SQLException: No suitable driver found for jdbc:sqlserver:PC-BFS2
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at org.apache.spark.sql.jdbc.JDBCRDD$.resolveTable(JDBCRDD.scala:118)
at org.apache.spark.sql.jdbc.JDBCRelation.<init>(JDBCRelation.scala:128)
at org.apache.spark.sql.jdbc.DefaultSource.createRelation(JDBCRelation.scala:113)
at org.apache.spark.sql.sources.ResolvedDataSource$.apply(ddl.scala:269)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:114)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:231)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:379)
at py4j.Gateway.invoke(Gateway.java:259)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:133)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:207)
at java.lang.Thread.run(Unknown Source)