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4d38b49941
* scripts/sqlite2mysql: Fix non matching regex Regex was not matching for seahub.db export. e.g. 'CREATE TABLE IF NOT EXISTS "django_content_type" (...' was not matching. * fix default value quotation. * Update sqlite2mysql.py
86 lines
2.8 KiB
Python
86 lines
2.8 KiB
Python
#!/usr/bin/env python3
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"""Lifted from:
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http://stackoverflow.com/questions/18671/quick-easy-way-to-migrate-sqlite3-to-mysql
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Run like so:
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sqlite3 <your db>.db .dump | python sqlite2mysql.py > <your db>.sql
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Then you can import the .sql file into MySql
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Note - you need to add foreign key constrains manually since sqlite doesn't actually support them
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"""
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import re
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import fileinput
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def this_line_is_useless(line):
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useless_es = [
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'BEGIN TRANSACTION',
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'COMMIT',
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'sqlite_sequence',
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'CREATE UNIQUE INDEX',
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'PRAGMA',
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]
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for useless in useless_es:
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if re.search(useless, line):
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return True
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def has_primary_key(line):
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return bool(re.search(r'PRIMARY KEY', line))
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for line in fileinput.input():
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searching_for_end = False
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if this_line_is_useless(line): continue
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# this line was necessary because ''); was getting
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# converted (inappropriately) to \');
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if re.match(r".*, ''\);", line):
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line = re.sub(r"''\);", r'``);', line)
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if re.match(r'^CREATE TABLE.*', line):
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searching_for_end = True
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m = re.search('CREATE TABLE(?: IF NOT EXISTS)? [`"]?(\w+)[`"]?(\s*\(.*)', line)
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if m:
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name, sub = m.groups()
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sub = sub.replace('"','`')
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line = "DROP TABLE IF EXISTS `%(name)s`;\nCREATE TABLE IF NOT EXISTS `%(name)s`%(sub)s\n"
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line = line % dict(name=name, sub=sub)
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else:
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m = re.search('INSERT INTO "(\w*)"(.*)', line)
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if m:
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name, sub = m.groups()
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line = 'INSERT INTO `%s`%s\n' % m.groups()
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line = line.replace('"', r'\"')
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line = line.replace('"', "'")
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# line = re.sub(r"([^'])'t'(.)", r"\1THIS_IS_TRUE\2", line)
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# line = line.replace('THIS_IS_TRUE', '1')
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# line = re.sub(r"([^'])'f'(.)", r"\1THIS_IS_FALSE\2", line)
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# line = line.replace('THIS_IS_FALSE', '0')
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# Add auto_increment if it's not there since sqlite auto_increments ALL
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# primary keys
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if searching_for_end:
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if re.search(r"integer(?:\s+\w+)*\s*PRIMARY KEY(?:\s+\w+)*\s*,", line, re.I):
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line = line.replace("PRIMARY KEY", "PRIMARY KEY AUTO_INCREMENT")
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# replace " and ' with ` because mysql doesn't like quotes in CREATE commands
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line = line.replace('"', '`').replace("'", '`')
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# fix default values parantheses
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line = re.sub(r"default `([^`]*)`", r"default '\1'", line, 0, re.IGNORECASE)
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# And now we convert it back (see above)
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if re.match(r".*, ``\);", line):
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line = re.sub(r'``\);', r"'');", line)
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if searching_for_end and re.match(r'.*\);', line):
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searching_for_end = False
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if re.match(r"CREATE INDEX", line):
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line = re.sub('"', '`', line)
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line = line.replace('"', '`')
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line = line.replace('AUTOINCREMENT', 'AUTO_INCREMENT')
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print(line)
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