Commit ab008ede authored by unknown's avatar unknown
Browse files

Merge tkatchaounov@bk-internal.mysql.com:/home/bk/mysql-4.1 

into mysql.com:/home/timka/mysql/src/4.1-virgin
parents 165d271a 1abe8e69

mysql-test/r/range.result

+32 −1
Original line number Diff line number Diff line
@@ -556,11 +556,42 @@ count(*) 
0

select count(*) from t1 where x > -16;

count(*)

1

2

select count(*) from t1 where x = 18446744073709551601;

count(*)

1

drop table t1;

create table t1 (a bigint unsigned);

create index t1i on t1(a);

insert into t1 select 18446744073709551615;

insert into t1 select 18446744073709551614;

explain select * from t1 where a <> -1;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

1	SIMPLE	t1	index	t1i	t1i	9	NULL	2	Using where; Using index

select * from t1 where a <> -1;

a

18446744073709551614

18446744073709551615

explain select * from t1 where a > -1 or a < -1;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

1	SIMPLE	t1	index	t1i	t1i	9	NULL	2	Using where; Using index

select * from t1 where a > -1 or a < -1;

a

18446744073709551614

18446744073709551615

explain select * from t1 where a > -1;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

1	SIMPLE	t1	index	t1i	t1i	9	NULL	2	Using where; Using index

select * from t1 where a > -1;

a

18446744073709551614

18446744073709551615

explain select * from t1 where a < -1;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables

select * from t1 where a < -1;

a

drop table t1;

set names latin1;

create table t1 (a char(10), b text, key (a)) character set latin1;

INSERT INTO t1 (a) VALUES

mysql-test/t/range.test

+19 −3
Original line number Diff line number Diff line
@@ -423,14 +423,30 @@ select count(*) from t1 where x=0; 
select count(*) from t1 where x<0;

select count(*) from t1 where x < -16;

select count(*) from t1 where x = -16;

# The following query returns wrong value because the range optimizer can't

# handle search on a signed value for an unsigned parameter. This will be fixed in

# 5.0

select count(*) from t1 where x > -16;

select count(*) from t1 where x = 18446744073709551601;



drop table t1;



#

# Bug #11185 incorrect comparison of unsigned int to signed constant

#

create table t1 (a bigint unsigned);

create index t1i on t1(a);

insert into t1 select 18446744073709551615;

insert into t1 select 18446744073709551614;



explain select * from t1 where a <> -1;

select * from t1 where a <> -1;

explain select * from t1 where a > -1 or a < -1;

select * from t1 where a > -1 or a < -1;

explain select * from t1 where a > -1;

select * from t1 where a > -1;

explain select * from t1 where a < -1;

select * from t1 where a < -1;



drop table t1;



#

# Bug #6045: Binary Comparison regression in MySQL 4.1

# Binary searches didn't use a case insensitive index.

sql/opt_range.cc

+35 −3
Original line number Diff line number Diff line
@@ -960,6 +960,8 @@ get_mm_parts(PARAM *param, COND *cond_func, Field *field, 
	if (sel_arg->type == SEL_ARG::IMPOSSIBLE)

	{

	  tree->type=SEL_TREE::IMPOSSIBLE;

          /* If this is an NE_FUNC, we still need to check GT_FUNC. */

          if (!ne_func)

            DBUG_RETURN(tree);

	}

      }
@@ -979,7 +981,8 @@ get_mm_parts(PARAM *param, COND *cond_func, Field *field, 
    SEL_TREE *tree2= get_mm_parts(param, cond_func,

				  field, Item_func::GT_FUNC,

                                  value, cmp_type);

    if (tree2)

    if (!tree2)

      DBUG_RETURN(0)

    tree= tree_or(param,tree,tree2);

  }

  DBUG_RETURN(tree);
@@ -1159,6 +1162,35 @@ get_mm_leaf(PARAM *param, COND *conf_func, Field *field, KEY_PART *key_part, 
  if (!(tree=new SEL_ARG(field,str,str2)))

    DBUG_RETURN(0);		// out of memory



  /*

    Check if we are comparing an UNSIGNED integer with a negative constant.

    In this case we know that:

    (a) (unsigned_int [< | <=] negative_constant) == FALSE

    (b) (unsigned_int [> | >=] negative_constant) == TRUE

    In case (a) the condition is false for all values, and in case (b) it

    is true for all values, so we can avoid unnecessary retrieval and condition

    testing, and we also get correct comparison of unsinged integers with

    negative integers (which otherwise fails because at query execution time

    negative integers are cast to unsigned if compared with unsigned).

   */

  Item_result field_result_type= field->result_type();

  Item_result value_result_type= value->result_type();

  if (field_result_type == INT_RESULT && value_result_type == INT_RESULT &&

      ((Field_num*)field)->unsigned_flag && !((Item_int*)value)->unsigned_flag)

  {

    longlong item_val= value->val_int();

    if (item_val < 0)

    {

      if (type == Item_func::LT_FUNC || type == Item_func::LE_FUNC)

      {

        tree->type= SEL_ARG::IMPOSSIBLE;

        DBUG_RETURN(tree);

      }

      if (type == Item_func::GT_FUNC || type == Item_func::GE_FUNC)

        DBUG_RETURN(0);

    }

  }



  switch (type) {

  case Item_func::LT_FUNC:

    if (field_is_equal_to_item(field,value))