Wayne Zhang created SPARK-19818:
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             Summary: SparkR union should check for name consistency of input 
data frames 
                 Key: SPARK-19818
                 URL: https://issues.apache.org/jira/browse/SPARK-19818
             Project: Spark
          Issue Type: Bug
          Components: SparkR
    Affects Versions: 2.1.0
            Reporter: Wayne Zhang
            Priority: Minor


The current implementation accepts data frames with different schemas. See 
issues below:
{code}
df <- createDataFrame(data.frame(name = c("Michael", "Andy", "Justin"), age = 
c(1, 30, 19)))
union(df, df[, c(2, 1)])
     name     age
1 Michael     1.0
2    Andy    30.0
3  Justin    19.0
4     1.0 Michael
{code}



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