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Merge with 4.1

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BitKeeper/etc/logging_ok:
  auto-union
configure.in:
  Auto merged
include/config-win.h:
  Auto merged
include/my_global.h:
  Auto merged
mysql-test/r/drop.result:
  Auto merged
mysys/default.c:
  Auto merged
mysys/mf_keycache.c:
  Auto merged
sql/field.h:
  Auto merged
sql/item.h:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_func.h:
  Auto merged
sql/mysqld.cc:
  Auto merged
BitKeeper/deleted/.del-errmsg.txt~f96b7055cac394e:
  Auto merged
mysql-test/r/cast.result:
  Merge
mysql-test/t/cast.test:
  Merge
sql/sql_insert.cc:
  Merge
sql/sql_select.cc:
  Merge
This commit is contained in:
unknown
2005-04-30 09:46:08 +03:00
parent e64d221e69 3b6043870d
commit a6acc4462c
18 changed files with 518 additions and 82 deletions
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12
sql/sql_select.cc
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@ -2492,8 +2492,8 @@ merge_key_fields(KEY_FIELD *start,KEY_FIELD *new_fields,KEY_FIELD *end,
KEY_OPTIMIZE_EXISTS) |
((old->optimize | new_fields->optimize) &
KEY_OPTIMIZE_REF_OR_NULL));
old->null_rejecting= old->null_rejecting &&
new_fields->null_rejecting;
old->null_rejecting= (old->null_rejecting &&
new_fields->null_rejecting);
}
}
else if (old->eq_func && new_fields->eq_func &&
@ -2505,8 +2505,8 @@ merge_key_fields(KEY_FIELD *start,KEY_FIELD *new_fields,KEY_FIELD *end,
KEY_OPTIMIZE_EXISTS) |
((old->optimize | new_fields->optimize) &
KEY_OPTIMIZE_REF_OR_NULL));
old->null_rejecting= old->null_rejecting &&
new_fields->null_rejecting;
old->null_rejecting= (old->null_rejecting &&
new_fields->null_rejecting);
}
else if (old->eq_func && new_fields->eq_func &&
(old->val->is_null() || new_fields->val->is_null()))
@ -2518,7 +2518,7 @@ merge_key_fields(KEY_FIELD *start,KEY_FIELD *new_fields,KEY_FIELD *end,
if (old->val->is_null())
old->val= new_fields->val;
/* The referred expression can be NULL: */
old->null_rejecting= false;
old->null_rejecting= 0;
}
else
{
@ -2680,6 +2680,8 @@ add_key_field(KEY_FIELD **key_fields,uint and_level, Item_func *cond,
If the condition has form "tbl.keypart = othertbl.field" and
othertbl.field can be NULL, there will be no matches if othertbl.field
has NULL value.
We use null_rejecting in add_not_null_conds() to add
'othertbl.field IS NOT NULL' to tab->select_cond.
*/
(*key_fields)->null_rejecting= (cond->functype() == Item_func::EQ_FUNC) &&
((*value)->type() == Item::FIELD_ITEM) &&