如何使用TBL dplyr

创建的BigQuery（编辑尝试使重复的例子）如何使用TBL dplyr

我试图通过dplyr（和依赖性）连接至BigQuery，我得到一个错误。我究竟做错了什么？

require(dplyr) #installed from cran 
devtools::install_github("assertthat") 
devtools::install_github("bigrquery") 
require(bigrquery) 

billing_project = "omitted" 

sql <- "SELECT year, month, day, weight_pounds FROM natality LIMIT 5" 
query_exec("publicdata", "samples", sql, billing = billing_project) 

# returns 
# Auto-refreshing stale OAuth token. 
# year month day weight_pounds 
# 1 1969  1 2  8.999270 
# 2 1969  1 15  8.375361 
# 3 1969  1 27  9.124933 
# 4 1969  1 9  6.000983 
# 5 1969  1 25  7.561856 

bq_db = src_bigquery("publicdata","samples", billing=billing_project) 
bq_db 

# returns 
# src: bigquery [publicdata/samples] 
# tbls: github_nested, github_timeline, gsod, natality, shakespeare, trigrams, wikipedia 


tri=tbl(bq_db, "trigrams") 

# returns 
# Error in UseMethod("sql_select") : 
# no applicable method for 'sql_select' applied to an object of class "bigquery"

这是最后一个错误，我遇到了问题。

我原来是从cran安装dplyr的，版本是0.1.3。 bigrquery包是通过devtools从github安装的，它是0.1。

sessionInfo() 
R version 3.1.0 (2014-04-10) 
Platform: x86_64-apple-darwin13.1.0 (64-bit) 

locale: 
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 

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

other attached packages: 
[1] bigrquery_0.1 dplyr_0.1.3 

loaded via a namespace (and not attached): 
[1] assertthat_0.1.0.99 devtools_1.5  digest_0.6.4  evaluate_0.5.3  httpuv_1.3.0  
[6] httr_0.3   jsonlite_0.9.7  memoise_0.2.1  parallel_3.1.0  Rcpp_0.11.1   
[11] RCurl_1.95-4.1  stringr_0.6.2  tools_3.1.0   whisker_0.3-2

我也试图与此：

sql_q <- "SELECT year, month, day, weight_pounds FROM natality LIMIT 5" 
tri=tbl(bq_db, sql(sql_q)) 
# results in 
# Error in UseMethod("qry_fields") : 
# no applicable method for 'qry_fields' applied to an object of class "bigquery"

来源

2014-05-15 schnee

可否请你让这个例子多了几分重现？即，您是如何安装并加载bigrquery和dplyr的？ – hadley

希望编辑有帮助。第一次尝试在我的部分是糟糕的形式 – schnee

我想尝试的第一件事是来自github的dplyr。 – hadley

我经常这样做：

df <- tbl_df(query_exec(sql, project, max_pages = Inf))

来源

2016-03-10 18:22:31 Renato

如何使用TBL dplyr

回答

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