Hi, If these bounaries are not given, spark tries to read all the data as a single parition. See: https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRelation.scala#L56
// maropu On Wed, Aug 3, 2016 at 11:19 PM, Selvam Raman <sel...@gmail.com> wrote: > Hi All, > > I would like to read the data from RDBMS to spark (2.0) using > sparksession. How can i decide upper boundary, lower boundary and > partitions. > is there any specific approach available. > > How Sqoop2 decides number of partitions, upper and lower boundary if we > are not specifying anything. > > -- > Selvam Raman > "லஞ்சம் தவிர்த்து நெஞ்சம் நிமிர்த்து" > -- --- Takeshi Yamamuro
