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fixed bug 185 (constant IN (SELECT field ...) do not return NULL correctly)

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mysql-test/r/subselect.result:
  new test results
  test of bug 185
mysql-test/t/subselect.test:
  test of bug 185
sql/item.h:
  new method
sql/item_cmpfunc.cc:
  new Item to control NULL value in HAVING clouse
sql/item_cmpfunc.h:
  new Item to control NULL value in HAVING clouse
sql/item_subselect.cc:
  if IN was rewrited through WHERE thien it will be rewrited in following way:
  
  WHERE left_expr=item or is null(item) heving is_not_null_test(item)
sql/item_subselect.h:
  Item_is_not_null_test can change was_null flag
sql/sql_select.cc:
  some layout fix
This commit is contained in:
unknown
2003-04-23 00:01:19 +03:00
parent 1db8654191
commit 06017a0db0
8 changed files with 103 additions and 10 deletions
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5
sql/sql_select.cc
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@ -299,7 +299,7 @@ JOIN::prepare(Item ***rref_pointer_array,
DBUG_RETURN(-1); /* purecov: inspected */
ref_pointer_array= *rref_pointer_array;
if (having)
{
thd->where="having clause";
@ -313,6 +313,7 @@ JOIN::prepare(Item ***rref_pointer_array,
if (having->with_sum_func)
having->split_sum_func(ref_pointer_array, all_fields);
}
if (setup_ftfuncs(select_lex)) /* should be after having->fix_fields */
DBUG_RETURN(-1);
/*
@ -426,7 +427,7 @@ JOIN::optimize()
#ifdef HAVE_REF_TO_FIELDS // Not done yet
/* Add HAVING to WHERE if possible */
if (having && !group_list && ! sum_func_count)
if (having && !group_list && !sum_func_count)
{
if (!conds)
{