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Fix for bug #23412: delete rows with null date field

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Backport of the fix for bug #8143: A date with value 0 is treated as a NULL value


mysql-test/r/delete.result:
  Fix for bug #23412: delete rows with null date field
    - test result
mysql-test/t/delete.test:
  Fix for bug #23412: delete rows with null date field
    - test case
sql/sql_delete.cc:
  Fix for bug #23412: delete rows with null date field
    - during SELECT queries processing we convert 'date[time]_field is null'                   
      conditions into 'date[time]_field = 0000-00-00[ 00:00:00]' for not null                  
      DATE and DATETIME fields. To be consistent, we have to do the same for DELETE            
      queries. So we should call remove_eq_conds() in the mysql_delete() as well.              
      Also it may simplify and speed up DELETE queries execution.
This commit is contained in:
unknown
2006-10-27 18:08:50 +05:00
parent 5decebc5f3
commit d2c90fcb8e
3 changed files with 31 additions and 1 deletions
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8
sql/sql_delete.cc
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@ -79,6 +79,14 @@ int mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
/* Handler didn't support fast delete; Delete rows one by one */
}
if (conds)
{
Item::cond_result result;
conds= remove_eq_conds(thd, conds, &result);
if (result == Item::COND_FALSE) // Impossible where
limit= 0;
}
table->used_keys.clear_all();
table->quick_keys.clear_all(); // Can't use 'only index'
select=make_select(table,0,0,conds,&error);