Created
June 22, 2012 12:27
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Copy table from mysql to sqlite
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#! /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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The two compile_* functions have the same name