connect: connect

In hxia/DatabaseConnector4Impala: A Wrapper Around RJDBC Containing Drivers for Various DBMSs

Description

connect creates a connection to a database server.

Usage

connect(dbms = "sql server", user, domain, password, server, port, schema, extraSettings)
connect(connectionDetails)

Arguments

dbms	The type of DBMS running on the server. Valid values are "mysql" for MySQL "oracle" for Oracle "postgresql" for PostgreSQL "redshift" for Amazon Redshift "sql server" for Microsoft SQL Server "pdw" for Microsoft Parallel Data Warehouse (PDW) "netezza" for IBM Netezza
user	The user name used to access the server.
domain	For SQL Server only: the Windows domain (optional).
password	The password for that user.
server	The name of the server.
port	(optional) The port on the server to connect to.
schema	(optional) The name of the schema to connect to.
extraSettings	(optional) Additional configuration settings specific to the database provider to configure things as security for SSL. These must follow the format for the JDBC connection for the RDBMS specified in dbms
connectionDetails	An object of class connectionDetails as created by the createConnectionDetails function.

Details

This function creates a connection to a database.

Value

An object that extends DBIConnection in a database-specific manner. This object is used to direct commands to the database engine.

DBMS parameter details

Depending on the DBMS, the function arguments have slightly different interpretations: MySQL:

• user. The user name used to access the server

• password. The password for that user

• server. The host name of the server

• port. Specifies the port on the server (default = 3306)

• schema. The database containing the tables

• extraSettings The configuration settings for the connection (i.e. SSL Settings such as "SSL Mode=Required")

Oracle:

• user. The user name used to access the server

• password. The password for that user

• server. This field contains the SID, or host and servicename, SID, or TNSName: '<sid>', '<host>/<sid>', '<host>/<service name>', or '<tnsname>'

• port. Specifies the port on the server (default = 1521)

• schema. This field contains the schema (i.e. 'user' in Oracle terms) containing the tables

• extraSettings The configuration settings for the connection (i.e. SSL Settings such as "(PROTOCOL=tcps)")

Microsoft SQL Server:

• user. The user used to log in to the server. If the user is not specified, Windows Integrated Security will be used, which requires the SQL Server JDBC drivers to be installed (see details below).

• domain. Optionally, the domain can be specified here.

• password. The password used to log on to the server

• server. This field contains the host name of the server

• port. Not used for SQL Server

• schema. The database containing the tables. If both database and schema are specified (e.g. 'my_database.dbo', then only the database part is used, the schema is ignored.

• extraSettings The configuration settings for the connection (i.e. SSL Settings such as "encrypt=true; trustServerCertificate=false;")

Microsoft PDW:

• user. The user used to log in to the server. If the user is not specified, Windows Integrated Security will be used, which requires the SQL Server JDBC drivers to be installed (see details below).

• password. The password used to log on to the server

• server. This field contains the host name of the server

• port. Not used for SQL Server

• schema. The database containing the tables

• extraSettings The configuration settings for the connection (i.e. SSL Settings such as "encrypt=true; trustServerCertificate=false;")

Connections where the domain need to be specified are not supported PostgreSQL:

• user. The user used to log in to the server

• password. The password used to log on to the server

• server. This field contains the host name of the server and the database holding the relevant schemas: <host>/<database>

• port. Specifies the port on the server (default = 5432)

• schema. The schema containing the tables.

• extraSettings The configuration settings for the connection (i.e. SSL Settings such as "ssl=true")

Redshift:

• user. The user used to log in to the server

• password. The password used to log on to the server

• server. This field contains the host name of the server and the database holding the relevant schemas: <host>/<database>

• port. Specifies the port on the server (default = 5439)

• schema. The schema containing the tables.

• extraSettings The configuration settings for the connection (i.e. SSL Settings such as "ssl=true&sslfactory=com.amazon.redshift.ssl.NonValidatingFactory")

Netezza:

• user. The user used to log in to the server

• password. The password used to log on to the server

• server. This field contains the host name of the server and the database holding the relevant schemas: <host>/<database>

• port. Specifies the port on the server (default = 5480)

• schema. The schema containing the tables.

• extraSettings The configuration settings for the connection (i.e. SSL Settings such as "ssl=true")

To be able to use Windows authentication for SQL Server (and PDW), you have to install the JDBC driver. Download the .exe from Microsoft and run it, thereby extracting its contents to a folder. In the extracted folder you will find the file sqljdbc_4.0/enu/auth/x64/sqljdbc_auth.dll (64-bits) or sqljdbc_4.0/enu/auth/x86/sqljdbc_auth.dll (32-bits), which needs to be moved to location on the system path, for example to c:/windows/system32. In order to enable Netezza support, place your Netezza jdbc driver at inst/java/nzjdbc.jar in this package.

Examples

## Not run: 
conn <- connect(dbms = "mysql",
                server = "localhost",
                user = "root",
                password = "xxx",
                schema = "cdm_v4")
dbGetQuery(conn, "SELECT COUNT(*) FROM person")
dbDisconnect(conn)

conn <- connect(dbms = "sql server", server = "RNDUSRDHIT06.jnj.com", schema = "Vocabulary")
dbGetQuery(conn, "SELECT COUNT(*) FROM concept")
dbDisconnect(conn)

conn <- connect(dbms = "oracle",
                server = "127.0.0.1/xe",
                user = "system",
                password = "xxx",
                schema = "test")
dbGetQuery(conn, "SELECT COUNT(*) FROM test_table")
dbDisconnect(conn)

## End(Not run)

hxia/DatabaseConnector4Impala documentation built on May 17, 2019, 9:15 p.m.