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Copy table from mysql to sqlite
#! /usr/bin/python
# coding: utf-8
"""Copy table from mysql to sqlite.
Require:
* SQLAlchemy
* MySQLdb or PyMySQL
Usage:
mylite.py "mysql+pymysql://user:password@host/db?charset=utf8" "sqlite:///out.db" table_name [table_name2...]
"""
import sqlalchemy as sa
from sqlalchemy.ext.compiler import compiles
from sqlalchemy.dialects import mysql
@compiles(mysql.TINYINT, 'sqlite')
@compiles(mysql.SMALLINT, 'sqlite')
def compile_sqlite_tinyint(type_, compiler, **kw):
return 'INTEGER'
@compiles(mysql.LONGBLOB, 'sqlite')
def compile_sqlite_tinyint(type_, compiler, **kw):
return 'BLOB'
def copy_table(my_engine, lite_engine, table_name):
meta = sa.MetaData(my_engine)
table = sa.Table(table_name, meta, autoload=True)
lite_engine.execute("DROP TABLE IF EXISTS " + table_name)
table.create(lite_engine)
rows = my_engine.execute(table.select()).fetchall()
with lite_engine.begin() as con:
for row in rows:
con.execute(table.insert().values(**row))
def main():
import sys
mysql = sa.create_engine(sys.argv[1])
lite = sa.create_engine(sys.argv[2])
for table in sys.argv[3:]:
copy_table(mysql, lite, table)
if __name__ == '__main__':
main()
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