Connect/disconnect to a MariaDB DBMS
These methods are straight-forward implementations of the corresponding generic functions.
## S4 method for signature 'MariaDBDriver'
dbConnect(
drv,
dbname = NULL,
username = NULL,
password = NULL,
host = NULL,
unix.socket = NULL,
port = 0,
client.flag = 0,
groups = "rs-dbi",
default.file = NULL,
ssl.key = NULL,
ssl.cert = NULL,
ssl.ca = NULL,
ssl.capath = NULL,
ssl.cipher = NULL,
...,
bigint = c("integer64", "integer", "numeric", "character"),
timeout = 10,
timezone = "+00:00",
timezone_out = NULL
)
MariaDB()drv |
an object of class MariaDBDriver or MariaDBConnection. |
dbname |
string with the database name or NULL. If not NULL, the connection sets the default database to this value. |
username, password |
Username and password. If username omitted, defaults to the current user. If password is omitted, only users without a password can log in. |
host |
string identifying the host machine running the MariaDB server or
NULL. If NULL or the string |
unix.socket |
(optional) string of the unix socket or named pipe. |
port |
(optional) integer of the TCP/IP default port. |
client.flag |
(optional) integer setting various MariaDB client flags, see Client-flags for details. |
groups |
string identifying a section in the |
default.file |
string of the filename with MariaDB client options,
only relevant if |
ssl.key |
(optional) string of the filename of the SSL key file to use. |
ssl.cert |
(optional) string of the filename of the SSL certificate to use. |
ssl.ca |
(optional) string of the filename of an SSL certificate authority file to use. |
ssl.capath |
(optional) string of the path to a directory containing the trusted SSL CA certificates in PEM format. |
ssl.cipher |
(optional) string list of permitted ciphers to use for SSL encryption. |
... |
Unused, needed for compatibility with generic. |
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. |
timeout |
Connection timeout, in seconds. Use |
timezone |
(optional) time zone for the connection,
the default corresponds to UTC.
Set this argument if your server or database is configured with a different
time zone than UTC.
Set to |
timezone_out |
The time zone returned to R.
The default is to use the value of the |
MySQL and MariaDB support named time zones, they must be installed on the server. See https://dev.mysql.com/doc/mysql-g11n-excerpt/8.0/en/time-zone-support.html for more details. Without installation, time zone support is restricted to UTC offset, which cannot take into account DST offsets.
Configuration files: https://mariadb.com/kb/en/library/configuring-mariadb-with-mycnf/
## Not run:
# Connect to a MariaDB database running locally
con <- dbConnect(RMariaDB::MariaDB(), dbname = "mydb")
# Connect to a remote database with username and password
con <- dbConnect(RMariaDB::MariaDB(), host = "mydb.mycompany.com",
user = "abc", password = "def")
# But instead of supplying the username and password in code, it's usually
# better to set up a group in your .my.cnf (usually located in your home
directory). Then it's less likely you'll inadvertently share them.
con <- dbConnect(RMariaDB::MariaDB(), group = "test")
# Always cleanup by disconnecting the database
dbDisconnect(con)
## End(Not run)
# All examples use the rs-dbi group by default.
if (mariadbHasDefault()) {
con <- dbConnect(RMariaDB::MariaDB(), dbname = "test")
con
dbDisconnect(con)
}
if (mariadbHasDefault()) {
# connect to a database and load some data
con <- dbConnect(RMariaDB::MariaDB(), dbname = "test")
dbWriteTable(con, "USArrests", datasets::USArrests, temporary = TRUE)
# query
rs <- dbSendQuery(con, "SELECT * FROM USArrests")
d1 <- dbFetch(rs, n = 10) # extract data in chunks of 10 rows
dbHasCompleted(rs)
d2 <- dbFetch(rs, n = -1) # extract all remaining data
dbHasCompleted(rs)
dbClearResult(rs)
dbListTables(con)
# clean up
dbDisconnect(con)
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.