def _set_index(self, schema, name, fields, **index_options):
query_str = "<STR_LIT>".format(<EOL>'<STR_LIT>' if index_options.get('<STR_LIT>', False) else '<STR_LIT>',<EOL>schema,<EOL>name,<EOL>self._normalize_table_name(schema),<EOL>'<STR_LIT:U+002CU+0020>'.join((self._normalize_name(f) for f in fields))<EOL>)<EOL>return self._query(query_str, ignore_result=True, **index_options)<EOL>
https://www.sqlite.org/lang_createindex.html