ProjectTemplate (version 0.4-2)

sql.reader: Read a database described in a .sql file.

Description

This function will load data from a SQL database based on configuration information found in the specified .sql file. The .sql file must specify a database to be accessed. All tables from the database, one specific tables or one specific query against any set of tables may be executed to generate a data set.

Usage

sql.reader(data.file, filename, variable.name)

Arguments

data.file

The name of the data file to be read.

filename

The path to the data set to be loaded.

variable.name

The name to be assigned to in the global environment.

Value

• No value is returned; this function is called for its side effects.

Details

Examples of the DCF format and settings used in a .sql file are shown below:

Example 1 type: mysql user: sample_user password: sample_password host: localhost dbname: sample_database table: sample_table

Example 2 type: sqlite dbname: /path/to/sample_database table: sample_table

Example 3 type: sqlite dbname: /path/to/sample_database query: SELECT * FROM users WHERE user_active == 1

Example 4 type: sqlite dbname: /path/to/sample_database table: *

Example 5 type: postgres user: sample_user password: sample_password host: localhost dbname: sample_database table: sample_table

Example 6 type: odbc dsn: sample_dsn user: sample_user password: sample_password dbname: sample_database query: SELECT * FROM sample_table

Examples

library('ProjectTemplate')

sql.reader('example.sql', 'data/example.sql', 'example')

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