使用 R 的 JDBC

R 支持使用 RJDBC 库访问 JDBC。

RJDBC

run.sh

#!/usr/bin/env bash

# Java must already be installed and R configured with `R CMD javareconf`

Rscript -e 'install.packages("RJDBC", dep=TRUE)'
Rscript solr_rjdbc.R

solr_rjdbc.R

# https://www.rforge.net/RJDBC/

library("RJDBC")

solrCP <- c(list.files('/opt/solr/server/lib/ext/', list.files('/opt/solr/server/solr-webapp/webapp/WEB-INF/lib/', full.names=TRUE, recursive = TRUE))

drv <- JDBC("org.apache.solr.client.solrj.io.sql.DriverImpl",
           solrCP,
           identifier.quote="`")
conn <- dbConnect(drv, "jdbc:solr://localhost:9983?collection=test", "user", "pwd")

dbGetQuery(conn, "select fielda, fieldb, fieldc, fieldd_s, fielde_i from test limit 10")

dbDisconnect(conn)