bk commit into 5.0 tree (evgen:1.1949) BUG#14093

[eugene]

Below is the list of changes that have just been committed into a local
5.0 repository of evgen. When evgen does a push these changes will
be propagated to the main repository and, within 24 hours after the
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ChangeSet
  1.1949 05/10/27 17:30:42 evgen@stripped +3 -0
  Fix bug #14093 Query takes a lot of time when date format is not valid
  
  Invalid date like 2000-02-32 wasn't converted to int, which lead to not
  using index and comparison with field as astring, which results in slow
  query execution.
  
  convert_constatn_item() and get_mm_leaf() now forces MODE_INVALID_DATES to
  allow such conversion.

  sql/item_cmpfunc.cc
    1.184 05/10/27 17:24:20 evgen@stripped +5 -0
     Fix bug #14093 Query takes a lot of time when date format is not valid
    convert_constant_item() now allows conversion of invalid dates like 2000-01-32 to int
to make it possible to use index when comparing fields with such dates.

  sql/opt_range.cc
    1.194 05/10/27 17:22:00 evgen@stripped +8 -1
     Fix bug #14093 Query takes a lot of time when date format is not valid
    get_mm_leaf() modified so it allows index usage for comparing fields with invalid
dates like 2000-01-32.

  sql/item.h
    1.177 05/10/27 17:14:57 evgen@stripped +1 -0
    Fix bug #14093 Query takes a lot of time when date format is not valid
    To Item_int_with_ref added method real_item() which returns ref.

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	evgen
# Host:	moonbone.local
# Root:	/work/14093-bug-5.0-mysql

--- 1.176/sql/item.h	2005-10-20 10:55:25 +04:00
+++ 1.177/sql/item.h	2005-10-27 17:14:57 +04:00
@@ -1749,6 +1749,7 @@
     return ref->save_in_field(field, no_conversions);
   }
   Item *new_item();
+  virtual Item *real_item() { return ref; }
 };
 
 

--- 1.183/sql/item_cmpfunc.cc	2005-10-21 05:01:31 +04:00
+++ 1.184/sql/item_cmpfunc.cc	2005-10-27 17:24:20 +04:00
@@ -186,13 +186,18 @@
 {
   if ((*item)->const_item())
   {
+    /* For comparison purposes allow invalid dates like 2000-01-32 */
+    ulong orig_sql_mode= field->table->in_use->variables.sql_mode;
+    field->table->in_use->variables.sql_mode|= MODE_INVALID_DATES;
     if (!(*item)->save_in_field(field, 1) && !((*item)->null_value))
     {
       Item *tmp=new Item_int_with_ref(field->val_int(), *item);
+      field->table->in_use->variables.sql_mode= orig_sql_mode;
       if (tmp)
         thd->change_item_tree(item, tmp);
       return 1;					// Item was replaced
     }
+    field->table->in_use->variables.sql_mode= orig_sql_mode;
   }
   return 0;
 }

--- 1.193/sql/opt_range.cc	2005-10-19 12:41:23 +04:00
+++ 1.194/sql/opt_range.cc	2005-10-27 17:22:00 +04:00
@@ -3921,13 +3921,20 @@
       value->result_type() != STRING_RESULT &&
       field->cmp_type() != value->result_type())
     goto end;
-
+  /* For comparison purposes allow invalid dates like 2000-01-32 */
+  ulong orig_sql_mode= field->table->in_use->variables.sql_mode;
+  if (value->real_item()->type() == Item::STRING_ITEM &&
+      (field->type() == FIELD_TYPE_DATE ||
+       field->type() == FIELD_TYPE_DATETIME))
+    field->table->in_use->variables.sql_mode|= MODE_INVALID_DATES;
   if (value->save_in_field_no_warnings(field, 1) < 0)
   {
+    field->table->in_use->variables.sql_mode= orig_sql_mode;
     /* This happens when we try to insert a NULL field in a not null column */
     tree= &null_element;                        // cmp with NULL is never TRUE
     goto end;
   }
+  field->table->in_use->variables.sql_mode= orig_sql_mode;
   str= (char*) alloc_root(alloc, key_part->store_length+1);
   if (!str)
     goto end;