python - sqlalchemy: migrate data from mysql to sqlite failes, Index "ClassName" already exists -

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i try create local sqlite "working" copy of live mysql database better performance.

i got type conversion mysql->sqlite types working, migration fails during index creation following exception:

sqlalchemy.exc.operationalerror: (sqlite3.operationalerror) index classname exists [sql: u'create index "classname" on "member" ("classname")']

where "classname" column name. full output of engine can found here: http://pastebin.com/zpuqikvs

i think problem same index name reused, don't know how change this.

i use following script:

# -*- coding: utf-8 -*- import os, sys import sqlalchemy sa sqlalchemy.ext.compiler import compiles sqlalchemy.dialects.mysql import enum, mediumtext, tinyint   # define mysql -> sqlite mappings @compiles(enum, 'sqlite') def compile_enum(element, compiler, **kw):     """ handles mysql enum type string in sqlite"""     return compiler.visit_string(element, **kw)   # define mysql -> sqlite mappings @compiles(mediumtext, 'sqlite') def compile_mediumtext(element, compiler, **kw):     """ handles mysql mediumtext type string in sqlite"""     return compiler.visit_string(element, **kw)   # define mysql -> sqlite mappings @compiles(tinyint, 'sqlite') def compile_tinyint(element, compiler, **kw):     """ handles mysql tinyint type string in sqlite"""     return compiler.visit_integer(element, **kw)   if __name__ == '__main__':     # fix import     pwd = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))     sys.path.append(pwd)      import legacy_config cfg      src = sa.create_engine(cfg.sqlalchemy_database_uri)     dst = sa.create_engine('sqlite://', echo=true)      # create meta , reflect source db     meta = sa.metadata()     meta.reflect(bind=src)      meta.create_all(bind=dst)


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