測試sql server全文索引,結果遇到問題

select * from t_fulltext where contains(title,'南寧');

Server: Msg 7342, Level 16, State 1, Line 1
Unexpected NULL value returned for column '[FULLTEXT:t_fulltext].KEY' from the OLE DB provider 'Full-text Search Engine'. This column cannot be NULL.
OLE DB error trace [Non-interface error:  Unexpected NULL value returned for the column:  ProviderName='Full-text Search Engine', TableName='[FULLTEXT:t_fulltext]', ColumnName='KEY'].

未解決

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