metis

Helpers for Accessing and Querying Amazon Athena

Including a lightweight RJDBC shim.

In Greek mythology, Metis was Athena’s “helper”.

Description

Still fairly beta-quality level but getting there.

The goal will be to get around enough of the “gotchas” that are preventing raw RJDBC Athena connections from “just working” with dplyr v0.6.0+ and also get around the fetchSize problem without having to not use dbGetQuery().

The AthenaJDBC42_2.0.2.jar JAR file is included out of convenience but that will likely move to a separate package as this gets closer to prime time if this goes on CRAN.

NOTE that the updated driver REQUIRES JDK 1.8+.

See the Usage section for an example.

What’s Inside The Tin?

The following functions are implemented:

Easy-interface connection helper:

• athena_connect Make a JDBC connection to Athena

Custom JDBC Classes:

• Athena: AthenaJDBC (make a new Athena con obj)
• AthenaConnection-class: AthenaJDBC
• AthenaDriver-class: AthenaJDBC
• AthenaResult-class: AthenaJDBC

Custom JDBC Class Methods:

• dbConnect-method: AthenaJDBC
• dbExistsTable-method: AthenaJDBC
• dbGetQuery-method: AthenaJDBC
• dbListFields-method: AthenaJDBC
• dbListTables-method: AthenaJDBC
• dbReadTable-method: AthenaJDBC
• dbSendQuery-method: AthenaJDBC

Pulled in from other cloudyr pkgs:

• read_credentials: Use Credentials from .aws/credentials File
• use_credentials: Use Credentials from .aws/credentials File

Installation

devtools::install_github("hrbrmstr/metis")

Usage

library(metis)
library(tidyverse)

# current verison
packageVersion("metis")

## [1] '0.3.0'

use_credentials("default")

athena_connect(
  default_schema = "sampledb", 
  s3_staging_dir = "s3://accessible-bucket",
  log_path = "/tmp/athena.log",
  log_level = "DEBUG"
) -> ath

dbListTables(ath, schema="sampledb")

## [1] "elb_logs"

dbExistsTable(ath, "elb_logs", schema="sampledb")

## [1] TRUE

dbListFields(ath, "elb_logs", "sampledb")

##  [1] "timestamp"             "elbname"               "requestip"             "requestport"          
##  [5] "backendip"             "backendport"           "requestprocessingtime" "backendprocessingtime"
##  [9] "clientresponsetime"    "elbresponsecode"       "backendresponsecode"   "receivedbytes"        
## [13] "sentbytes"             "requestverb"           "url"                   "protocol"

dbGetQuery(ath, "SELECT * FROM sampledb.elb_logs LIMIT 10") %>% 
  type_convert() %>% 
  glimpse()

## Observations: 10
## Variables: 16
## $ timestamp             <dttm> 2014-09-30 01:28:17, 2014-09-30 00:01:30, 2014-09-30 00:01:30, 2014-09-30 00:01:30, ...
## $ elbname               <chr> "lb-demo", "lb-demo", "lb-demo", "lb-demo", "lb-demo", "lb-demo", "lb-demo", "lb-demo...
## $ requestip             <chr> "246.140.190.136", "240.109.129.138", "242.251.232.153", "253.227.207.81", "253.227.2...
## $ requestport           <dbl> 63777, 22705, 22705, 22705, 23282, 24178, 22916, 23807, 22916, 21443
## $ backendip             <chr> "250.193.168.100", "251.103.130.45", "243.140.114.254", "243.82.95.243", "246.129.102...
## $ backendport           <dbl> 8888, 8888, 8888, 8888, 8899, 8888, 8888, 8888, 8888, 8888
## $ requestprocessingtime <dbl> 7.2e-05, 6.9e-05, 8.7e-05, 9.7e-05, 8.1e-05, 4.6e-05, 4.3e-05, 5.3e-05, 5.5e-05, 4.4e-05
## $ backendprocessingtime <dbl> 0.379241, 0.007541, 0.187126, 0.413337, 0.037030, 0.050222, 0.043706, 0.045953, 0.015...
## $ clientresponsetime    <dbl> 8.0e-05, 4.3e-05, 7.5e-05, 8.7e-05, 4.5e-05, 3.3e-05, 3.3e-05, 6.9e-05, 8.5e-05, 4.9e-05
## $ elbresponsecode       <int> 200, 302, 302, 200, 200, 200, 200, 200, 200, 200
## $ backendresponsecode   <int> 200, 200, 200, 400, 200, 200, 200, 404, 200, 200
## $ receivedbytes         <dbl> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
## $ sentbytes             <dbl> 58402, 0, 0, 58402, 32370, 20766, 3408, 152213, 84245, 3884
## $ requestverb           <chr> "GET", "GET", "GET", "GET", "GET", "GET", "GET", "GET", "GET", "GET"
## $ url                   <chr> "http://www.abcxyz.com:80/", "http://www.abcxyz.com:80/", "http://www.abcxyz.com:80/a...
## $ protocol              <chr> "HTTP/1.1", "HTTP/1.1", "HTTP/1.1", "HTTP/1.1", "HTTP/1.1", "HTTP/1.1", "HTTP/1.1", "...

Code of Conduct

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.