DBI::dbConnect() establishes a connection to a database. Set drv = RPostgres::Postgres() to connect to a SQL database using the RPostgres package.

Manually disconnecting a connection is not necessary with RPostgres, but still recommended; if you delete the object containing the connection, it will be automatically disconnected during the next GC with a warning.

Postgres()

# S4 method for PqDriver
dbConnect(
  drv,
  dbname = NULL,
  host = NULL,
  port = NULL,
  password = NULL,
  user = NULL,
  service = NULL,
  ...,
  bigint = c("integer64", "integer", "numeric", "character"),
  check_interrupts = FALSE,
  timezone = "UTC",
  timezone_out = NULL
)

# S4 method for PqConnection
dbDisconnect(conn, ...)

Arguments

drv

Should be set to Postgres() to use the RPostgres package.

dbname

Database name. If NULL, defaults to the user name. Note that this argument can only contain the database name, it will not be parsed as a connection string (internally, expand_dbname is set to false in the call to PQconnectdbParams()).

host, port

Host and port. If NULL, will be retrieved from PGHOST and PGPORT env vars.

user, password

User name and password. If NULL, will be retrieved from PGUSER and PGPASSWORD envvars, or from the appropriate line in ~/.pgpass. See https://www.postgresql.org/docs/current/libpq-pgpass.html for more details.

service

Name of service to connect as. If NULL, will be ignored. Otherwise, connection parameters will be loaded from the pg_service.conf file and used. See https://www.postgresql.org/docs/current/libpq-pgservice.html for details on this file and syntax.

...

Other name-value pairs that describe additional connection options as described at https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PARAMKEYWORDS

bigint

The R type that 64-bit integer types should be mapped to, default is bit64::integer64, which allows the full range of 64 bit integers.

check_interrupts

Should user interrupts be checked during the query execution (before first row of data is available)? Setting to TRUE allows interruption of queries running too long.

timezone

Sets the timezone for the connection. The default is "UTC". If NULL then no timezone is set, which defaults to the server's time zone.

timezone_out

The time zone returned to R, defaults to timezone. If you want to display datetime values in the local timezone, set to Sys.timezone() or "". This setting does not change the time values returned, only their display.

conn

Connection to disconnect.

Examples

if (FALSE) { # postgresHasDefault()
library(DBI)
# Pass more arguments as necessary to dbConnect()
con <- dbConnect(RPostgres::Postgres())
dbDisconnect(con)
}