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The R package DIZutils provides utility functions used
for the R package development infrastructure inside the data integration
centers (‘DIZ’) to standardize and facilitate repetitive tasks such as
setting up a database connection or issuing notification messages and to
avoid redundancy.
You can install DIZutils directly from CRAN:
install.packages("DIZutils")The development version can be installed using
install.packages("remotes")
remotes::install_github("miracum/misc-dizutils", ref = "development")The function DIZutils::db_connection provides one simple
interface for connecting to various types of databases. It reads
necessary connection settings from the active environment (see below how
to use the function set_env_vars to set environment
variables).
The following database types are currently supported:
The following environment variables need to be set to the active environment in order to connect with a postgres database with “i2b2” as name of the database to connect with:
| Variable | Description |
|---|---|
| I2B2_HOST | The hostname/ IP address of your pg instance. |
| I2B2_DBNAME | The name of the pg-database. |
| I2B2_PORT | The port, your pg postgres instance is running on. |
| I2B2_USER | The name of the ‘I2B2_USER’. |
| I2B2_PASSWORD | The password of the ‘I2B2_USER’ of your pg instance. |
| I2B2_SCHEMA | (optional) The database schema on which queries should be performed. |
To establish the connection, please set those environment variables
accordingly and execute the following command. The argument
db_name is used to detect the corresponding environment
variables and thus must match with the environment variables’
prefix.
db_con <- DIZutils::db_connection(
system_name = "i2b2",
db_type = "postgres"
)The following environment variables need to be set to the active environment in order to connect with an oracle database:
| Variable | Description |
|---|---|
| MYORACLEDB_HOST | The hostname/ IP address of your oracle instance. |
| MYORACLEDB_DBNAME | The name of the oracle-database. |
| MYORACLEDB_DRIVER | The path to the oracle jdbc driver. |
| MYORACLEDB_SID | The SID of the oracle-database. |
| MYORACLEDB_PORT | The port, your oracle postgres instance is running on. |
| MYORACLEDB_USER | The name of the ‘MYORACLEDB_USER’. |
| MYORACLEDB_PASSWORD | The password of the ‘MYORACLEDB_USER’ of your oracle instance. |
To establish the connection, please set those environment variables
accordingly and execute the following command. The argument
db_name is used to detect the corresponding environment
variables and thus must match with the environment variables’ prefix.
Furthermore, an ojdbc*.jar-file needs to be provided via the function’s
lib_path argument.
db_con <- DIZutils::db_connection(
system_name = "myoracledb",
db_type = "oracle",
lib_path = "path/to/ojdbc*.jar"
)For further details on how to set the specific environment variables
using a configuration file, please refer to the documentation in the DIZtools
R package.
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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