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Merge zippy.cornsilk.net:/home/cmiller/work/mysql/bug23411/my41-bug23411

Browse source 
into  zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-4.1-maint
This commit is contained in:
unknown 2006-11-06 18:01:47 -05:00
commit 02e764bd10
4 changed files with 111 additions and 1 deletions
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2
BitKeeper/etc/collapsed
View file

@ -1 +1,3 @@
452a92d0-31-8wSzSfZi165fcGcXPA
454a7ef8gdvE_ddMlJyghvOAkKPNOQ
454f8960jsVT_kMKJtZ9OCgXoba0xQ

75
mysql-test/r/func_test.result
View file

@ -183,3 +183,78 @@ select 5.1 mod 3, 5.1 mod -3, -5.1 mod 3, -5.1 mod -3;
select 5 mod 3, 5 mod -3, -5 mod 3, -5 mod -3;
5 mod 3 5 mod -3 -5 mod 3 -5 mod -3
2 2 -2 -2
select (12%0) <=> null as '1';
1
1
select (12%0) is null as '1';
1
1
select 12%0 as 'NULL';
NULL
NULL
select 12%2 as '0';
0
0
select 12%NULL as 'NULL';
NULL
NULL
select 12 % null as 'NULL';
NULL
NULL
select null % 12 as 'NULL';
NULL
NULL
select null % 0 as 'NULL';
NULL
NULL
select 0 % null as 'NULL';
NULL
NULL
select null % null as 'NULL';
NULL
NULL
select (12 mod 0) <=> null as '1';
1
1
select (12 mod 0) is null as '1';
1
1
select 12 mod 0 as 'NULL';
NULL
NULL
select 12 mod 2 as '0';
0
0
select 12 mod null as 'NULL';
NULL
NULL
select null mod 12 as 'NULL';
NULL
NULL
select null mod 0 as 'NULL';
NULL
NULL
select 0 mod null as 'NULL';
NULL
NULL
select null mod null as 'NULL';
NULL
NULL
select mod(12.0, 0) as 'NULL';
NULL
NULL
select mod(12, 0.0) as 'NULL';
NULL
NULL
select mod(12, NULL) as 'NULL';
NULL
NULL
select mod(12.0, NULL) as 'NULL';
NULL
NULL
select mod(NULL, 2) as 'NULL';
NULL
NULL
select mod(NULL, 2.0) as 'NULL';
NULL
NULL

32
mysql-test/t/func_test.test
View file

@ -108,4 +108,36 @@ select 5.1 mod 3, 5.1 mod -3, -5.1 mod 3, -5.1 mod -3;
select 5 mod 3, 5 mod -3, -5 mod 3, -5 mod -3;
#
# Bug#23411: The "%" (MOD) operator is not documented; MOD-ing zero returns strange result
# Manual: "Division by zero produces a NULL result"
#
select (12%0) <=> null as '1';
select (12%0) is null as '1';
select 12%0 as 'NULL';
select 12%2 as '0';
select 12%NULL as 'NULL';
select 12 % null as 'NULL';
select null % 12 as 'NULL';
select null % 0 as 'NULL';
select 0 % null as 'NULL';
select null % null as 'NULL';
select (12 mod 0) <=> null as '1';
select (12 mod 0) is null as '1';
select 12 mod 0 as 'NULL';
select 12 mod 2 as '0';
select 12 mod null as 'NULL';
select null mod 12 as 'NULL';
select null mod 0 as 'NULL';
select 0 mod null as 'NULL';
select null mod null as 'NULL';
select mod(12.0, 0) as 'NULL';
select mod(12, 0.0) as 'NULL';
select mod(12, NULL) as 'NULL';
select mod(12.0, NULL) as 'NULL';
select mod(NULL, 2) as 'NULL';
select mod(NULL, 2.0) as 'NULL';
# End of 4.1 tests

3
sql/item_func.cc
View file

@ -96,7 +96,7 @@ Item_func::Item_func(THD *thd, Item_func *item)
/*
Resolve references to table column for a function and it's argument
Resolve references to table column for a function and its argument
SYNOPSIS:
fix_fields()
@ -707,6 +707,7 @@ longlong Item_func_mod::val_int()
void Item_func_mod::fix_length_and_dec()
{
Item_num_op::fix_length_and_dec();
maybe_null= 1;
}