Question

直到现在我遇到以下错误时，我一直在我的R脚本中使用sqldf：

library(sqldf)
data(mtcars)
out <- sqldf("SELECT * FROM mtcars")

> Error in rsqlite_send_query(conn@ptr, statement) : no such table: mtcars

此前这不是问题，任何人都知道这是什么问题？

Answer 1

我在CRAN（Windows 10）中遇到0.4-10这个问题。

> out <- sqldf("SELECT * FROM mtcars")
Loading required package: tcltk
Error in rsqlite_send_query(conn@ptr, statement) : no such table: mtcars

然后我从GitHub升级，版本0.4-11

> devtools::install_github("ggrothendieck/sqldf")
Downloading GitHub repo ggrothendieck/sqldf@master
from URL https://api.github.com/repos/ggrothendieck/sqldf/zipball/master
Installing sqldf
Installing 1 package: DBI
Installing package into ‘C:/Users/romunov/Documents/R/win-library/3.3’
(as ‘lib’ is unspecified)
trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.3/DBI_0.7.zip'
Content type 'application/zip' length 746913 bytes (729 KB)
downloaded 729 KB

package ‘DBI’ successfully unpacked and MD5 sums checked

The downloaded binary packages are in
    C:\Users\romunov\AppData\Local\Temp\Rtmp6vYjwO\downloaded_packages
"C:/PROGRA~1/R/R-33~1.3/bin/x64/R" --no-site-file --no-environ  \
  --no-save --no-restore --quiet CMD INSTALL  \
  "C:/Users/romunov/AppData/Local/Temp/Rtmp6vYjwO/devtoolsdb05f0015fc/ggrothendieck-sqldf-af1277f"  \
  --library="C:/Users/romunov/Documents/R/win-library/3.3"  \
  --install-tests 

* installing *source* package 'sqldf' ...
** R
** demo
** inst
** tests
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded
*** arch - i386
*** arch - x64
* DONE (sqldf)
Reloading installed sqldf
> sqldf("SELECT * FROM mtcars LIMIT 6")
   mpg cyl disp  hp drat    wt  qsec vs am gear carb
1 21.0   6  160 110 3.90 2.620 16.46  0  1    4    4
2 21.0   6  160 110 3.90 2.875 17.02  0  1    4    4
3 22.8   4  108  93 3.85 2.320 18.61  1  1    4    1
4 21.4   6  258 110 3.08 3.215 19.44  1  0    3    1
5 18.7   8  360 175 3.15 3.440 17.02  0  0    3    2
6 18.1   6  225 105 2.76 3.460 20.22  1  0    3    1

查看GitHub的最后两次提交，对sqldf包没有进行实质性更改。 DBI确实升级到了0.7，这可能解决了这个问题。 Gabor可能会介入细节。

sqldf无法找到错误“没有这样的表”的数据

1 个答案: