48 lines
1.7 KiB
Python
48 lines
1.7 KiB
Python
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import re
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def mysql_to_sqlite( mysql_sql_code ):
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"""
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converts a mysql-compatible sql code into a sqlite-ompatible sql code
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note: the original code was found on internet, then tweaked
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"""
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content = mysql_sql_code
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# unused commands
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COMMAND_RE = re.compile(r'^(SET).*?;\n$', re.I | re.M | re.S)
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content = COMMAND_RE.sub('', content)
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# table constraints
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TCONS_RE = re.compile(r'\)(\s*(CHARSET|DEFAULT|ENGINE)(=.*?)?\s*)+;', re.I | re.M | re.S)
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content = TCONS_RE.sub(');', content)
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# remove comments
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# content = re.sub(r'^-- Tab[.]', 'toto', content, flags=re.I | re.M | re.S)
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# sqlite doesn't like 'unsigned' as in `ip_address_3` tinyint(3) unsigned NOT NULL default '27',
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content = re.sub(r' unsigned ', ' ', content)
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# sqlite doesn't like 'enum' as in `type` enum('normal','light_out_management') NOT NULL default 'normal',,
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content = re.sub(r' enum\([^\)]*\) ', ' varchar(255) ', content)
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# insert multiple values
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# INSERTVALS_RE = re.compile(r'^(INSERT INTO.*?VALUES)\s*\((.*)\*;', re.I | re.M | re.S)
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INSERTVALS_RE = re.compile(r'^(INSERT INTO.*?VALUES)\s*([^;]*);', re.I | re.M | re.S)
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#INSERTVALS_RE = re.compile(r'^(INSERT INTO.*?VALUES)\s*((\[^\)](\)));$', re.I | re.M | re.S)
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INSERTVALS_SPLIT_RE = re.compile(r'\)\s*,\s*\(', re.I | re.M | re.S)
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def insertvals_replacer(match):
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insert, values = match.groups()
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# print("insert=%s"%insert)
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# print("values=%s"%values)
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values = re.sub('^\s*\(' ,'', values)
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values = re.sub('\)\s*$' ,'', values)
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replacement = ''
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for vals in INSERTVALS_SPLIT_RE.split(values):
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#print("vals=%s"%vals)
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replacement = '%s\n%s (%s);' % (replacement, insert, vals)
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return replacement
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content = INSERTVALS_RE.sub(insertvals_replacer, content)
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return content
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