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Detailed revision comments: r6285 | marko | 2009-12-09 09:24:50 +0200 (Wed, 09 Dec 2009) | 13 lines branches/zip: row_sel_fetch_columns(): Remove redundant code that was accidentally added in r1591, which introduced dfield_t::ext in order to make the merge sort of fast index creation support externally stored columns, Initially, I tried to allocate the bit for dfield_t::ext from dfield_t::len by making the length 31 bits and mapping UNIV_SQL_NULL to something that would fit in it. Then I decided that it would be too risky. The redundant check was part of the mapping. The condition may have been dfield_is_null() initially. This redundant code was noticed by Sergey Petrunya on the MySQL internals list. r6288 | marko | 2009-12-09 09:51:00 +0200 (Wed, 09 Dec 2009) | 15 lines branches/zip: row_upd_copy_columns(): Remove redundant code that was accidentally added in r1591, which introduced dfield_t::ext in order to make the merge sort of fast index creation support externally stored columns. Initially, I tried to allocate the bit for dfield_t::ext from dfield_t::len by making the length 31 bits and mapping UNIV_SQL_NULL to something that would fit in it. Then I decided that it would be too risky. The redundant check was part of the mapping. The condition may have been dfield_is_null() initially. This is similar to the redundant code in row_sel_fetch_columns() that was noticed by Sergey Petrunya on the MySQL internals list and removed in r6285. As far as I can tell, there are no redundant UNIV_SQL_NULL assignments remaining after this change.