dbj can be installed most easily using the devtools package. After you have installed devtools, just run
The source compilation requires that you have maven installed.
library(DBI) library(dbj) # Initially, register the JDBC drivers you need jdbc_register_driver( 'org.h2.Driver', resolve( module('com.h2database:h2:1.3.176'), repositories = list(maven_local, maven_central) ) ) con <- dbConnect(dbj::driver(), 'jdbc:h2:mem:') dbWriteTable(con, "iris", iris) # dbj supports prepared statements sql <- paste0( "SELECT * FROM ", dbQuoteIdentifier(con, "iris"), " WHERE ", dbQuoteIdentifier(con, "Species"), " = ?" ) dbGetQuery(con, sql, parameters = list("setosa"))
No version has been releaded yet. dbj is under active development and tested agains different JDBC drivers using DBItest:
The default type mapping between R and SQL is (roughly) as follows:
R classes | SQL types ------------------|----------------- logical | BIT, BOOLEAN numeric | FLOAT, REAL, DOUBLE, NUMERIC, DECIMAL, BIGINT integer | TINYINT, SMALLINT, INTEGER, NULL character, factor | CHAR, VARCHAR, LONGVARCHAR, NCHAR, NVARCHAR, LONGNVARCHAR Date | DATE difftime | TIME POSIXct | TIMESTAMP list(raw) | BINARY, BLOB
dbj is a rewrite of Simon Urbanek's RJDBC packge. Development started with only minor code modifications to meet the requirements of the devtools package development tools and the design guidelines for good R packages (See R packages by Hadley Wickham). In the end, the code diverged too far to merge it back into RJDBC.
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