Take a look at the doc for the method:
/**
* Applies a schema to an RDD of Java Beans.
*
* WARNING: Since there is no guaranteed ordering for fields in a Java Bean,
* SELECT * queries will return the columns in an undefined order.
* @group dataframes
* @since 1.3.0
*/
At 2015-08-18 15:40:54, "MooseSpark" <pandey.mayur...@gmail.com> wrote:
>I have a RDD which I am using to create the data frame based on one POJO, but
>when Dataframe is created, the sequence of column order get changed.
>
>DataFrame df=sqlCtx.createDataFrame(rdd, Pojo.class);
>
>String[] columns=df.columns();
>//columns here are of different order what has been defined in pojo
>//in pojo properties are p1,p2,p3
>//but in columns it is p3 p1 p2 and same is being saved into jdbc
>
>df.insertIntoJDBC("jdbc:sqlserver://xx.yyy.00.11:PORT;databaseName=spark_gpeh;user=saw;password=password@123;",
>"Test", false);
>
>any idea ?
>
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