1. 13 Nov, 2010 1 commit
    • Alexander Nozdrin's avatar
      Fix for Bug#56934 (mysql_stmt_fetch() incorrectly fills MYSQL_TIME · 5af51e4a
      Alexander Nozdrin authored
      structure buffer).
      
      This is a follow-up for WL#4435. The bug actually existed not only
      MYSQL_TYPE_DATETIME type. The problem was that Item_param::set_value()
      was written in an assumption that it's working with expressions, i.e.
      with basic data types.
      
      There are two different quick fixes here:
        a) Change Item_param::make_field() -- remove setting of
           Send_field::length, Send_field::charsetnr, Send_field::flags and
           Send_field::type.
      
           That would lead to marshalling all data using basic types to the client
           (MYSQL_TYPE_LONGLONG, MYSQL_TYPE_DOUBLE, MYSQL_TYPE_STRING and
           MYSQL_TYPE_NEWDECIMAL). In particular, that means, DATETIME would be
           sent as MYSQL_TYPE_STRING, TINYINT -- as MYSQL_TYPE_LONGLONG, etc.
      
           That could be Ok for the client, because the client library does
           reverse conversion automatically (the client program would see DATETIME
           as MYSQL_TIME object). However, there is a problem with metadata --
           the metadata would be wrong (misleading): it would say that DATETIME is
           marshaled as MYSQL_TYPE_DATETIME, not as MYSQL_TYPE_STRING.
      
        b) Set Item_param::param_type properly to actual underlying field type.
           That would lead to double conversion inside the server: for example,
           MYSQL_TIME-object would be converted into STRING-object
           (in Item_param::set_value()), and then converted back to MYSQL_TIME-object
           (in Item_param::send()).
      
           The data however would be marshalled more properly, and also metadata would
           be correct.
      
      This patch implements b).
      
      There is also a possibility to avoid double conversion either by clonning
      the data field, or by storing a reference to it and using it on Item::send()
      time. That requires more work and might be done later.
      5af51e4a
  2. 12 Nov, 2010 4 commits
  3. 11 Nov, 2010 6 commits
  4. 10 Nov, 2010 8 commits
  5. 09 Nov, 2010 9 commits
  6. 08 Nov, 2010 10 commits
  7. 07 Nov, 2010 2 commits
    • Dmitry Shulga's avatar
      1f798940
    • Dmitry Shulga's avatar
      A fix and a test case for Bug#47924 -main.log_tables times out · 9c45600d
      Dmitry Shulga authored
      sporadically.
      
      The cause of the sporadic time out was a leaking protection
      against the global read lock, taken by the RENAME statement,
      and not released in case of an error occurred during RENAME.
      The leaking protection counter would lead to the value of
      protect_against_global_read never dropping to 0.
      Consequently FLUSH TABLES in all connections, including the
      one that leaked the protection, could not proceed.
       
      The fix is to ensure that all branchesin RENAME code properly
      release GRL protection.
      9c45600d