使用 R 通过 drill 将数据帧写入 hdfs

Question

n = c(2, 3, 5) 
s = c("aa", "bb", "cc") 
b = c(TRUE, FALSE, TRUE) 
df = data.frame(n, s, b) 
ch <- odbcConnect("Drill")
sqlSave(ch, df, tablename = "tblTest", rownames=FALSE, append=TRUE)

当我执行上面的代码时，它抛出异常：

Error in sqlSave(ch, df, tablename = "tblTest", rownames = FALSE, append = FALSE) : 
  HY000 1040 [MapR][Drill] (1040) Drill failed to execute the query: CREATE TABLE "tblTest"  ("n" DOUBLE, "s" varchar(255), "b" varchar(255))
[30024]Query execution error. Details:[ 
ParseException: Encountered "\"" at line 1, column 14.
Was expecting one of:
    <IDENTIFIER> ...
    <QUOTED_IDENTIFIER> ...
    <BACK_QUOTED_IDENTIFIER> ...
    <BRACKET_QUOTED_IDENTIFIER> ...
    <UNICODE_QUOTED_IDENTIFIER> ...

]

我在网上查了很久，还是没找到解决办法。有没有人可以帮忙？谢谢。

Answer 1

也许你应该看看 rhdfs 包？ https://github.com/RevolutionAnalytics/rhdfs

使用 R 通过 drill 将数据帧写入 hdfs

Using R write data frame to hdfs via drill

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