SQLiteToMysql_network.py
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#!/usr/bin/env python
import re
import fileinput
def this_line_is_useless(line):
useless_es = [
'BEGIN TRANSACTION',
'COMMIT',
'sqlite_sequence',
'CREATE UNIQUE INDEX',
'PRAGMA foreign_keys=OFF',
]
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
# this line was necessary because '');
# would be converted to \'); which isn't appropriate
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 "?(\w*)"?(.*)', 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)
line = line.replace('net_id text not null','net_id varchar(200) not null')
line = line.replace('network_info ( net_id varchar(200) not null','network_info ( net_id varchar(200) primary key not null')
line = line.replace('references network_info','references network_info(net_id)')
line = line.replace('prefix_length integer not null, constraint net_id_fk','prefix_length integer not null, constraint net_id_fk_link')
line = line.replace('host_address text not null, constraint net_id_fk','host_address text not null, constraint net_id_fk_inet')
else:
m = re.search('INSERT INTO "(\w*)"(.*)', 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')
# Add auto_increment if it is not there since sqlite auto_increments ALL
# primary keys
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")
# replace " and ' with ` because mysql doesn't like quotes in CREATE commands
if line.find('DEFAULT') == -1:
line = line.replace(r'"', r"'").replace(r"'", r"'")
else:
parts = line.split('DEFAULT')
parts[0] = parts[0].replace(r'"', r"'").replace(r"'", r"'")
line = 'DEFAULT'.join(parts)
# And now we convert it back (see above)
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"AUTOINCREMENT", line):
line = re.sub("AUTOINCREMENT", "AUTO_INCREMENT", line)
print (line)