dbplyr v1.2.1

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A 'dplyr' Back End for Databases

A 'dplyr' back end for databases that allows you to work with remote database tables as if they are in-memory data frames. Basic features works with any database that has a 'DBI' back end; more advanced features require 'SQL' translation to be provided by the package author.

Readme

dbplyr

Build Status CRAN\_Status\_Badge Coverage Status

Overview

dbplyr is the database backend for dplyr. If you are using dplyr to connect to databases, you generally will not need to use any functions from dbplyr, but you will need to make sure it's installed.

Issues

If you find any bugs, please file in dplyr.

Installation

# You can install the released version from CRAN
install.packages("dbplyr")

# Or the the development version from GitHub:
# install.packages("devtools")
devtools::install_github("tidyverse/dbplyr")

Usage

library(dplyr, warn.conflicts = FALSE)

con <- DBI::dbConnect(RSQLite::SQLite(), ":memory:")
copy_to(con, mtcars)

mtcars2 <- tbl(con, "mtcars")
mtcars2
#> # Source:   table<mtcars> [?? x 11]
#> # Database: sqlite 3.19.3 [:memory:]
#>      mpg   cyl  disp    hp  drat    wt  qsec    vs    am  gear  carb
#>    <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#>  1  21.0     6 160.0   110  3.90 2.620 16.46     0     1     4     4
#>  2  21.0     6 160.0   110  3.90 2.875 17.02     0     1     4     4
#>  3  22.8     4 108.0    93  3.85 2.320 18.61     1     1     4     1
#>  4  21.4     6 258.0   110  3.08 3.215 19.44     1     0     3     1
#>  5  18.7     8 360.0   175  3.15 3.440 17.02     0     0     3     2
#>  6  18.1     6 225.0   105  2.76 3.460 20.22     1     0     3     1
#>  7  14.3     8 360.0   245  3.21 3.570 15.84     0     0     3     4
#>  8  24.4     4 146.7    62  3.69 3.190 20.00     1     0     4     2
#>  9  22.8     4 140.8    95  3.92 3.150 22.90     1     0     4     2
#> 10  19.2     6 167.6   123  3.92 3.440 18.30     1     0     4     4
#> # ... with more rows

Functions in dbplyr

Name Description
join.tbl_sql Join sql tbls.
build_sql Build a SQL string.
memdb_frame Create a database table in temporary in-memory database.
copy_to.src_sql Copy a local data frame to a DBI backend.
window_order Override window order and frame
lazy_ops Lazy operations
win_over Generate SQL expression for window functions
remote_name Metadata about a remote table
partial_eval Partially evaluate an expression.
translate_sql Translate an expression to sql.
ident Flag a character vector as SQL identifiers
simulate_dbi Create a local lazy tibble
in_schema Refer to a table in a schema
tbl_sql Create an SQL tbl (abstract)
sql_escape_logical More SQL generics
sql_expr Generate SQL from R expressions
sql_variant Create an sql translator
sql_quote Helper function for quoting sql elements.
lahman Cache and retrieve an src_sqlite of the Lahman baseball database.
do.tbl_sql Perform arbitrary computation on remote backend
src_dbi dplyr backend for any DBI-compatible database
escape Escape/quote a string.
db_copy_to More db generics
sql_build Build and render SQL from a sequence of lazy operations
named_commas Provides comma-separated string out ot the parameters
nycflights13 Database versions of the nycflights13 data
sql SQL escaping.
dbplyr-package dbplyr: A 'dplyr' Back End for Databases
src_sql Create a "sql src" object
testing Infrastructure for testing dplyr
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Vignettes of dbplyr

Name
notes/mysql-setup.Rmd
notes/postgres-setup.Rmd
dbplyr.Rmd
new-backend.Rmd
sql-translation.Rmd
windows.graffle
windows.png
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Last month downloads

Details

Type Package
License MIT + file LICENSE
URL https://github.com/tidyverse/dbplyr
BugReports https://github.com/tidyverse/dplyr/issues
VignetteBuilder knitr
LazyData yes
RoxygenNote 6.0.1
Collate 'cache.r' 'compat-purrr.R' 'data-lahman.r' 'data-nycflights13.r' 'db-compute.R' 'db-mysql.r' 'db-odbc-access.R' 'db-odbc-hive.R' 'db-odbc-impala.R' 'db-odbc-mssql.R' 'db-odbc-oracle.R' 'db-odbc-redshift.R' 'db-odbc-teradata.R' 'db-postgres.r' 'db-roracle.R' 'db-sqlite.r' 'dbi-s3.r' 'dbplyr.R' 'do.r' 'explain.r' 'utils.r' 'ident.R' 'lazy-ops.R' 'memdb.R' 'partial-eval.r' 'query.r' 'remote.R' 'schema.R' 'simulate.r' 'sql-build.R' 'sql-escape.r' 'sql-expr.R' 'sql-generic.R' 'sql-optimise.R' 'sql-query.R' 'sql-render.R' 'sql.R' 'src-sql.r' 'src_dbi.R' 'tbl-lazy.R' 'tbl-sql.r' 'test-frame.R' 'testthat.r' 'translate-sql-helpers.r' 'translate-sql-window.r' 'translate-sql-base.r' 'translate-sql-clause.r' 'translate-sql-odbc.R' 'translate-sql-paste.R' 'translate-sql.r' 'utils-format.r' 'window.R' 'zzz.R'
NeedsCompilation no
Packaged 2018-02-19 15:55:28 UTC; hadley
Repository CRAN
Date/Publication 2018-02-19 19:40:06 UTC

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