Not sure whether this is the right distribution list that I can ask questions.
If not, can someone give a distribution list that can find someone to help?I
kept getting error of reference is ambiguous when implementing some sparkR
code.1. when i tried to assign values to a column using the existing
column:df$c_mon<- df$ra*016/09/09 15:11:28 ERROR RBackendHandler: col on 3101
failedError in invokeJava(isStatic = FALSE, objId$id, methodName, ...) :
org.apache.spark.sql.AnalysisException: Reference 'ra' is ambiguous, could be:
ra#8146, ra#13501.;2. when I joined two spark dataframes using the
key:df3<-join(df1, df2, df1$ra == df2$ra, "left")16/09/09 14:48:07 WARN Column:
Constructing trivially true equals predicate, 'ra#8146 = ra#8146'. Perhaps you
need to use aliases.Actually column "ra" is the column name, I don't know why
sparkR keeps having errors about ra#8146 or ra#13501..Can someone help?Thanks
