BahDB

BahDB is a fast relational database, built in Bah for Bah.

It is really simple to use and really shows how simple and elegant Bah can be.

Features

• thread safe
• process safe
• scanning
• serializing
• indexing
• portable

Documentation

The database interface.

Declaring a database

db = bahDB{}

Opening/closing a file

Used for mapping the database to a file.

db.open("path/to/my/database.db")

//database stuff

db.close()

Conditions

Used for determining which elements must be affected.

condition = dbWhere("field", DB_EQUALS, value)
//means any element where element.field == value

Operations

Here is the list of all operations availables:

• DB_EQUALS
• DB_NOT_EQUALS
• DB_GREATER
• DB_LESS
• DB_GREATER_EQUAL
• DB_LESS_EQUAL
• DB_LIKE

Chaining operations

You can add multiple operations together by using the + operator:

condition = dbWhere("field", DB_EQUALS, value) + dbWhere("field2", DB_LIKE, "%test%")
//means any element where element.field == value
//and element.field2 contains "test"

Setters

Used for updating a specified field of an object.

setter = dbSet("field", value)
//means any element where element.field = value

Chaning setters

As operations, setters can be chained using the + operator.

Inserting

Used for inserting an element in the database.

myElem = new myStruct
db.insert(myElem)

Updating

Used for updating the content of an element inside the database.

template = new myStruct

db.update(condition, template, setter)

The template is used as a skeletton, only the fields presents in the template will be kepped.

Selecting

Used for fetching the requested elements from the databse.

res = []myStruct*

db.select(condition, res)

Deleting

Used for deleting elements from the database.

db.delete(condition)

Example

There is an example of the database's usage in the file test.bah.

It is a simple command line interface for registering and managing messages.