Py-OO-MySQL

Python Object-Orinted MySQL interface.

This allows to interact ith MySQL/MariaDB databases easily by constructing objects.

Table of Contents

1. Requirements
2. Classes / Objects
3. Functions
4. Samples

1. Requirements

The MySQLLib package is developed fully in Python3 and is not compatible with Python 2.X at all. Please use Python 3.6 or later to ensure the best compatibility. This package uses mysql-connector-python as backend. Make sure you have it installed by issuing the following command:

pip install mysql-connector-python

2. Classes

Database

The database class represents a simple pair hostname:port and holds connection status and other useful information about the Database itself and the connection, when the last is established.

Attributes

• auth_plugin

  Authentication plugin support.

• connection

  Existing connection object (from mysql.connector.connection) or None if there is no connection.

• hostname

  Hostname/IP address used to connect to.

• password

  Password used for connecting to the database.

• port

  Port used to connect to the database. Defaults to 3306

• schema

  As in the default schema used for connecting to the database

• username

  Username set for the connection.

• version

  Short version number

• full_version

  Full version and revision

Methods

• __init__(hostname, port=3306, schema, log_level)

  Constructor that will set hsotname, port and default schema along with the standard log_level INFO (as in the standard library logging.INFO)

• connect(username: string, password: string, [schema]: string, [auth_plugin]: string)

  Connects to the host:port using the provided username and password. The schema defaults to "information_schema"

• disconnect

  Closes the current connection if any

• execute(command: string)

  Executes a command in the database provided that there's a connection established.

• flush_privileges

  Flushes privileges after granting/revoking

• get_schema

  Returns a dictionary with information about particular schema

• get_schemas

  Returns a dictionary with information about all the schemas found in the database

• get_user_by_name

  Returns user/host information for a given username, it might be more than one

• get_user_by_name_host

  Returns exactly one user/host information for a given username

• get_version

  Returns the MySQL version

• is_connected

  Returns True if there's a connection established or False otherwise.

• load_schemas

  Loads schemas to the databas

• reconnect

  Reconnects to the database in case of lost connection with same username and password

Schema

The schema class represents a schema within a database, thus it requires a database object to be passed to it at creation time.

Attributes

• charset

  Returns the character set for the schema

• collation

  Returns collation for the schema

• database

  Returns hostname:port information about the database where the schema resides

• name

  Returns the name of the schema

• tables

  Returns a list with the names of the tables in the schema

Methods

• compare

  Allows the comparison of 2 schema objects

• get_table

  Returns information about a particular table

• get_tables

  Returns a list of the tables found in the schema

• load_tables

  Loads the tables to the schema attribute

Table

The Table class represents a particular table within a schema within a database.

Attributes

• database

  Database whrre the table resides

• fqn

  Fully qualified name of the table in the form {schema_name}.{table_name}

• name

  Name of the table

• schema

  Schema where the table resides

Methods

• compare_data

  Allows to compare row-per-row the contents of the table with another one

• delete

  Deletes rows from a table based on filters

• get_columns

  Returns a list with the names of the columns in the table

• get_insert_statement

  Returns the normal SQL insert statement for the table

• get_rowcount

  Returns the number of rows in the table

• insert

  Inserts data in the table

• truncate

  Truncates the table, removing all data

• update

  Update rows in the Table based on some filters

User

The User class represents a User within the database

Attributes

• exists

  Boolean showing if the user exists or not

• grants

  List of privileges that the user has

• host

  Host authorized to connect from

• roles

  List of roles granted to the user

• username

  This is self explanatory

Methods

• create

  Create the user if it doesn't exist in the database

• drop

  Drops the user if it exists in the database

• get_grants

  Under development

• update

  Updates the user if it exists in the database

3. Functions

Util: SQL

4. Samples

# Import the package
import pyoomysql

# Create Database object
mydb = pyoomysql.Datbase(
    hostname = "example.com",
    port = 3306
)

# Connect
mydb.connect(
    username="someuser",
    password="super_secret_password"
)

# Create a schema object
myschema = pyoomysql.Schema(
    database = mydb,
    name = "some_schema"
)

# Create Table object
mytable = pyoomysql.Table(
    schema = myschema,
    name = "some_table"
)

# Create User object
myuser = pyoomysql.User(
    name = "some_nice_username",
    host = "% or host to connect from",
    password = "very_long_and_strong_password"
)

# Create the user in the database
myuser.create()