rdbms 1.0.2

Relational Database Management System

RDBMS

Relational Database Management System

Installing

Install and update using pip3:

$ pip3 install rdbms

Python 3 and newer.

Simple Usage

from rdbms import RDBMS


class User(RDBMS):
    path = './test_sqlite.db' # default in-memory usage

    def setup(self):
        """
        CREATE TABLE IF NOT EXISTS  user
        (
         id INTEGER   PRIMARY KEY   AUTOINCREMENT,
         name         TEXT          NOT NULL UNIQUE,
         password     CHAR(200)
         );
        """

    def create_user(self, name, password):
        """
        INSERT INTO user (name, password)
        VALUES ('{name}', '{password}')
        """

    def get_user(self, name):
        """
        SELECT * FROM user
        WHERE name = '{name}'
        """

    def execute_script_example(script=True):
       """
       Run script
       """


if __name__ == '__main__':
    user = User()
    user.create_user(name='username', password='1234')
    users = user.get_user(name='username')
    assert users[0].name == 'username'
    assert users[0].name == users[0]['name']

Parameters Example

from rdbms import RDBMS


class Test(RDBMS):
    def setup(self): # not required | script parameter defaults to True for setup function
        """
        Some SQL script
        """

    def script_execute(self, script=True): # run script | script default False
        """
        Some SQL script
        """

    def iterable_object(self, iterable=True): # return generator | iterable default False
        """
        Some SQL query
        """

    def fixed_size(self, size=1): # fixed size data return | size default None
        """
        Some SQL query
        """

Function Example

from rdbms import RDBMS


def titlecase(text):
    return text.title()

class Test(RDBMS):
    ...

    def get_test_function_data(self, data):
        """
        SELECT titlecase(name) FROM test WHERE name='{data}'
        """


if __name__ == '__main__':
    test = Test()
    test.add_function(titlecase)
    result = self.test.get_test_function_data(data='test name')
    assert result[0].name == 'Test Name'

Aggregate Example

from rdbms import RDBMS


class mysum:
    def __init__(self):
        self.count = 0

    def step(self, value):
        self.count += value

    def finalize(self):
        return self.count

class Test(RDBMS):
    ...

    def get_test_aggregate_data(self):
        """
        SELECT mysum(age) FROM test
        """


if __name__ == '__main__':
    test = Test()
    test.add_aggregate(mysum)
    result = test.get_test_aggregate_data()
    assert result[0]['mysum(age)'] == 100

Collaction Example

from rdbms import RDBMS


def collate_reverse(string1, string2):
    if string1 == string2:
        return 0
    elif string1 < string2:
        return 1
    else:
        return -1

class Test(RDBMS):
    ...

    def get_test_collation_data(self):
        """
        SELECT name FROM test ORDER BY name COLLATE collate_reverse
        """


if __name__ == '__main__':
    test = Test()
    test.add_collaction(collate_reverse)
    result = test.get_test_collation_data()
    assert result[0]['name'] == 'b'
    assert result[1]['name'] == 'a'

Text Factory Example

from rdbms import RDBMS
from rdbms.text_factories import text_factory_bytes


class Test(RDBMS):
    ...


if __name__ == '__main__':
    test = Test()
    test.set_text_factory(text_factory_bytes)
    data = test.get_data()
    assert result[0].attribute, bytes

Row Factory Example

from rdbms import RDBMS
from rdbms.text_factories import dict_factory


class Test(RDBMS):
    ...


if __name__ == '__main__':
    test = Test()
    test.set_row_factory(dict_factory)
    data = test.get_data()
    assert 'attribute' in result[0]

Support

• Python 3.x

• Supports all operating systems

Links

• License: MIT License

• Code: https://github.com/dinceraslancom/rdbms