RODBC错误:无法在mysql中使用SQLExecDirect

Question

我一直在尝试编写一个R脚本来查询Impala数据库.这是对数据库的查询:

select columnA, max(columnB) from databaseA.tableA where columnC in (select distinct(columnC) from databaseB.tableB ) group by columnA order by columnA 

当我手动运行此查询时(通过impala-shell读取:在Rscript之外),我可以获取表内容.但是,当通过R脚本尝试相同时,我收到以下错误:

[1] "HY000 140 [Cloudera][ImpalaODBC] (140) Unsupported query."       
[2] "[RODBC] ERROR: Could not SQLExecDirect 'select columnA, max(columnB) from databaseA.tableA where columnC in (select distinct(columnC) from databaseB.tableB ) group by columnA order by columnA'
closing unused RODBC handle 1

为什么在通过R尝试时查询失败？我该如何解决这个问题？提前致谢 :)

编辑1:

连接脚本如下所示:

library("RODBC");
connection <- odbcConnect("Impala");
query <- "select columnA, max(columnB) from databaseA.tableA where columnC in (select distinct(columnC) from databaseB.tableB ) group by columnA order by columnA";
data <- sqlQuery(connection,query);

Answer 1

您需要安装相关驱动，请查看以下链接

我遇到了同样的问题，我所要做的就是更新 ODBC 驱动程序。

另外，如果您可以使用用户名和密码更新 odbcConnect

connection <- odbcConnect("Impala");

到

connection <- odbcConnect("Impala", uid="root", pwd="password")