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cant find record Some engines return data for the record. Despite the fact that the null bit is set for some fields, their old value may still in the row. This can happen when unpacking an AI from the binlog on top of a previous record in which a field is set to NULL, which previously contained a value. Ultimately, this may cause the comparison of records to fail when the slave is doing an index or range scan. We fix this by deploying a call to reset() for each field that is set to null while unpacking a row from the binary log. Furthermore, we also add mixed mode test case to cover the scenario where updating and setting a field to null through a Query event and later searching it through a rows event will succeed. Finally, we also change the reset() method, from Field_bit class, so that it takes into account bits stored among the null bits and not only the ones stored in the record. |
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