如何优雅的将数据从sqlite3迁移到mysql

网上找了很多资料。发现都是有问题的。

比较接近要求有的。http://stackoverflow.com/questions/18671/quick-easy-way-to-migrate-sqlite3-to-mysql

在他基础上进行改造。

python代码

import re
import fileinput

def this_line_is_useless(line):
    useless_es = [
            'BEGIN TRANSACTION',
            'COMMIT',
            'sqlite_sequence',
            'CREATE UNIQUE INDEX',
            ]
    for useless in useless_es:
        if re.search(useless, line):
            return True

def has_primary_key(line):
    return bool(re.search(r'PRIMARY KEY', line))

searching_for_end = False
for line in fileinput.input():
    if this_line_is_useless(line): continue

    if re.match(r".*, ''\);", line):
        line = re.sub(r"''\);", r'``);', line)
    if re.match(r'^CREATE TABLE.*', line):
        searching_for_end = True

    m = re.search('CREATE TABLE "?([a-z0-9_]*)"?(.*)', line)
    if m:
        name, sub = m.groups()
        line = "DROP TABLE IF EXISTS %(name)s;\nCREATE TABLE IF NOT EXISTS `%(name)s`%(sub)s\n"
        line = line % dict(name=name, sub=sub)
    else:
        m = re.search('INSERT INTO "([a-z0-9_]*)"(.*)', line)
        if m:
            line = 'INSERT INTO %s%s\n' % m.groups()
            line = line.replace('"', r'\"')
            line = line.replace('"', "'")
    line = re.sub(r"([^'])'t'(.)", "\1THIS_IS_TRUE\2", line)
    line = line.replace('THIS_IS_TRUE', '1')
    line = re.sub(r"([^'])'f'(.)", "\1THIS_IS_FALSE\2", line)
    line = line.replace('THIS_IS_FALSE', '0')
    if searching_for_end:
        if re.search(r"integer(?:\s+\w+)*\s*PRIMARY KEY(?:\s+\w+)*\s*,", line):
            line = line.replace("PRIMARY KEY", "PRIMARY KEY AUTO_INCREMENT")
        line = line.replace('"', '`').replace("'", '`')

    if re.match(r".*, ``\);", line):
        line = re.sub(r'``\);', r"'');", line)

    if searching_for_end and re.match(r'.*\);', line):
        searching_for_end = False

    if re.match(r"CREATE INDEX", line):
        line = re.sub('"', '`', line)
    
    if re.match(r'ANALYZE sqlite_master', line):
        line = ''
    
    if re.match(r'INSERT INTO sqlite_stat1', line):
        line = ''

    if line is not None:
        print line,

执行

sqlite3 your.db .dump | python dump_for_mysql.py > dump.sql

之后联接数据库过程中需要设置联接以后编码为utf-8

然后导入dump.sql执行。ok了。

其中可能会出现错误

varchar(64,0)

手工修改为varchar(64)

=_=