SQL Migrators for usage_field

data/scripts/migrator/usage_mysql.py

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+#!/usr/bin/python
+
+# depends:
+#   ^ mysql (debian: python-mysql.connector)
+
+host = '127.0.0.1'
+port = 3306
+database = 'cgrates'
+user = 'root'
+password = 'CGRateS.org'
+
+import mysql.connector
+
+config = {
+  'user':               user,
+  'password':           password,
+  'host':               host,
+  'port':               port,
+  'database':           database,
+}
+
+print('Connecting to MySQL...')
+cnx = mysql.connector.connect(**config)
+cursor = cnx.cursor()
+
+print('Renaming old column...')
+cursor.execute('ALTER TABLE cdrs CHANGE COLUMN `usage` `usage_old` DECIMAL(30,9)')
+
+print('Adding new column...')
+cursor.execute('ALTER TABLE cdrs ADD `usage` DECIMAL(30)')
+
+print('Setting new values...')
+cursor.execute('UPDATE cdrs SET `usage` = `usage_old` * 1000000000 WHERE usage_old IS NOT NULL')
+
+print('Deleting old column...')
+cursor.execute('ALTER TABLEX cdrs DROP COLUMN usage_old')
+
+print('Closing MySQL connection...')
+cnx.close()
+

data/scripts/migrator/usage_postgres.py

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+#!/usr/bin/python
+
+# depends:
+#   ^ psycopg2 (debian: python-psycopg2)
+
+host = '127.0.0.1'
+port = 5432
+database = 'cgrates'
+user = 'cgrates'
+password = 'CGRateS.org'
+
+import psycopg2
+
+print('Connecting to PostgreSQL...')
+cnx = psycopg2.connect(
+    host=host,
+    port=port,
+    dbname=database,
+    user=user,
+    password=password
+    )
+cursor = cnx.cursor()
+
+print('Renaming old column...')
+cursor.execute('ALTER TABLE cdrs RENAME COLUMN usage to usage_old')
+
+print('Adding new column...')
+cursor.execute('ALTER TABLE cdrs ADD usage NUMERIC(30)')
+
+print('Setting new values...')
+cursor.execute('UPDATE cdrs SET usage = usage_old * 1000000000 WHERE usage_old IS NOT NULL')
+
+print('Deleting old column...')
+cursor.execute('ALTER TABLE cdrs DROP COLUMN usage_old')
+
+print('Commiting...')
+cnx.commit()
+
+print('Closing PostgreSQL connection...')
+cnx.close()