• Alexey Kopytov's avatar
    Fix for bug#41486: extra character appears in BLOB for every · a3e5737a
    Alexey Kopytov authored
                       ~40Mb after mysqldump/import 
            
    When the input string exceeds the maximum allowed size for the 
    internal buffer, batch_readline() returns a truncated string. 
    Since there was no way for a caller to determine whether the 
    string was truncated or not, the command line client assumed 
    batch_readline() to always return the whole input string and 
    appended a newline character. This resulted in garbled data 
    when importing dumps containing strings longer than the 
    maximum input buffer size. 
      
    Fixed by adding a flag to the batch_readline() interface to 
    signal a truncated string to the caller. 
      
    Other minor problems fixed during patch implementation: 
     
    - The maximum allowed buffer size for batch_readline() was set 
    up depending on the client's max_allowed_packet value. It does 
    not actully make any sense, as those variables are not 
    related. The input buffer size limit is now always set to 1 
    MB. 
      
    - fill_buffer() did not always set the EOF flag. 
     
    - The input buffer could actually grow twice as the specified 
    limit due to insufficient checks in intern_read_line(). 
    a3e5737a
mysql.test 16.1 KB