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https://issues.apache.org/jira/browse/SPARK-11167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14981398#comment-14981398
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Felix Cheung commented on SPARK-11167:
--------------------------------------
Another error from PR 8984
I can have this
> e <- new.env()
> e[["abd"]] <- 1276
> e[["84798"]] <- "abc"
> l <- list(e)
> df <- createDataFrame(sqlContext, list(l))
> df
DataFrame[_1:map<string,string>]
So env supports mixed type values they are mapped to map<string, string> on JVM.
In fact, this DataFrame doesn't seem to work properly
> head(df)
15/10/27 19:02:02 ERROR Executor: Exception in task 0.0 in stage 6.0 (TID 6)
scala.MatchError: 1276.0 (of class java.lang.Double)
at
org.apache.spark.sql.catalyst.CatalystTypeConverters$StringConverter$.toCatalystImpl(CatalystTypeConverters.scala:295)
> Incorrect type resolution on heterogeneous data structures
> ----------------------------------------------------------
>
> Key: SPARK-11167
> URL: https://issues.apache.org/jira/browse/SPARK-11167
> Project: Spark
> Issue Type: Bug
> Components: SparkR
> Affects Versions: 1.6.0
> Reporter: Maciej Szymkiewicz
>
> If structure contains heterogeneous incorrectly assigns type of the
> encountered element as type of a whole structure. This problem affects both
> lists:
> {code}
> SparkR:::infer_type(list(a=1, b="a")
> ## [1] "array<double>"
> SparkR:::infer_type(list(a="a", b=1))
> ## [1] "array<string>"
> {code}
> and environments:
> {code}
> SparkR:::infer_type(as.environment(list(a=1, b="a")))
> ## [1] "map<string,double>"
> SparkR:::infer_type(as.environment(list(a="a", b=1)))
> ## [1] "map<string,string>"
> {code}
> This results in errors during data collection and other operations on
> DataFrames:
> {code}
> ldf <- data.frame(row.names=1:2)
> ldf$foo <- list(list("1", 2), list(3, 4))
> sdf <- createDataFrame(sqlContext, ldf)
> collect(sdf)
> ## 15/10/17 17:58:57 ERROR Executor: Exception in task 0.0 in stage 9.0 (TID
> 9)
> ## scala.MatchError: 2.0 (of class java.lang.Double)
> ## ...
> {code}
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