Documentation

This is the Entity class. It is a type class that is used to define the mapping between a Haskell product type in record notation and a database table. The class has a default implementation for all methods. The default implementation uses the type information to determine a simple 1:1 mapping.

That means that - the type name is used as the table name and the - field names are used as the column names. - A field named 'typeNameID' is used as the primary key field.

The default implementation can be overridden by defining a custom instance for a type.

Please note the following constraints, which apply to all valid Entity type, but that are not explicitely encoded in the type class definition:

• The type must be a product type in record notation.
• The type must have exactly one constructor.
• There must be single primary key field, compund primary keys are not supported.

A convenience function: returns the name of the column for a field of a type a.

This module defines a wrapper around an HDBC IConnection. Using this wrapper Conn simplifies the signature of the functions in the GP module. It allows to use any HDBC connection without having to define a new function for each connection type. It also provides additional attributes to the connection, like the database type and the implicit commit flag. These attributes can be used to implement database specific functionality, modify transaction behaviour, etc.

This code has been inspired by the HDBC ConnectionWrapper and some parts have been copied verbatim from the HDBC Database.HDBC.Types module.

This module also defines a ConnectionPool type, which provides basic connection pooling functionality.

A wrapper around an HDBC IConnection.