megaptera::dbPars() 不会与 PostgreSQL 连接

Question

我想按照 megaptera vignette 使用 megaptera::dbPars() 函数，但是在执行该函数时我一直收到错误消息。可以通过 pgAdmin 4 以及命令行访问我的 PostgreSQL，并且工作正常。 RpostgresSQL 包中包含的功能工作正常，我安装了 DBI。我该怎么做才能使此代码正常工作？

> drv <- dbDriver("PostgreSQL")
> conn <- dbPars(dbname = "Cetacea", 
                 host = "localhost", port = 5432, 
                 user = "openpg", password = "new_user_password")

## Error in postgresqlNewConnection(drv, ...) : 
## RS-DBI driver: (could not connect openpg@local on dbname "openpg"
## )


> con <- dbConnect(PostgreSQL(), dbname = "newdata",
             host = "localhost", port = 5432,
             user = "openpg", password = "new_user_password")

> dbExistsTable(con, "iris")
## [1] TRUE


> sessionInfo()
## R version 3.3.2 (2016-10-31)
## Platform: x86_64-w64-mingw32/x64 (64-bit)
## Running under: Windows >= 8 x64 (build 9200)

## locale:
## [1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252   
## [3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C                          
## [5] LC_TIME=English_United States.1252    

## attached base packages:
## [1] stats     graphics  grDevices utils     datasets  methods   base     

## other attached packages:
## [1] megaptera_1.0-0   ips_0.0-9         XML_3.98-1.5      ape_4.0          
## [5] snowfall_1.84-6.1 snow_0.4-2        RPostgreSQL_0.4-1 DBI_0.5-1

Answer 1

包的 CRAN 版本 (v1.0-0) 最后更新于 2014 年 11 月 13 日，但包的维护者在 GitHub 上一直处于活动状态。 Git 版本 1.0-52 最后更新于 2016-10-21。更新后，代码按预期工作。

> library(devtools); install_github("heibl/megaptera")

> drv <- dbDriver("PostgreSQL")
> conn <- dbPars(dbname = "Cetacea", 
                 host = "localhost", port = 5432, 
                 user = "openpg", password = "new_user_password")
> show(conn)
## PostgreSQL connection parameters: 
##      host = localhost 
##      port = 5432 
##      dbname = cetacea 
##      user = openpg 
##      password = new_user_password

megaptera::dbPars() 不会与 PostgreSQL 连接

megaptera::dbPars() won't connect with PostgreSQL

r

postgresql

rpostgresql