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Merge mysql.com:/usr/home/ram/work/bug23254/my50-bug23254

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into  mysql.com:/usr/home/ram/work/bug23254/my51-bug23254
This commit is contained in:
ramil/ram@myoffice.izhnet.ru
2006-10-13 19:33:28 +05:00
parent ecb9b0cb02 84048dc763
commit bbd3470ec7
3 changed files with 24 additions and 1 deletions
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10
mysql-test/r/func_compress.result
View File

@ -79,6 +79,16 @@ uncompress(a) uncompressed_length(a)
NULL NULL NULL NULL
a 1 a 1
drop table t1; drop table t1;
create table t1(a blob);
insert into t1 values ('0'), (NULL), ('0');
select compress(a), compress(a) from t1;
select compress(a) is null from t1;
compress(a) is null
0
1
0
drop table t1;
End of 4.1 tests
create table t1 (a varchar(32) not null); create table t1 (a varchar(32) not null);
insert into t1 values ('foo'); insert into t1 values ('foo');
explain select * from t1 where uncompress(a) is null; explain select * from t1 where uncompress(a) is null;

14
mysql-test/t/func_compress.test
View File

@ -56,7 +56,19 @@ insert into t1 values(NULL), (compress('a'));
select uncompress(a), uncompressed_length(a) from t1; select uncompress(a), uncompressed_length(a) from t1;
drop table t1; drop table t1;
# End of 4.1 tests #
# Bug #23254: problem with compress(NULL)
#
create table t1(a blob);
insert into t1 values ('0'), (NULL), ('0');
--disable_result_log
select compress(a), compress(a) from t1;
--enable_result_log
select compress(a) is null from t1;
drop table t1;
--echo End of 4.1 tests
# #
# Bug #18539: uncompress(d) is null: impossible? # Bug #18539: uncompress(d) is null: impossible?

1
sql/item_strfunc.cc
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@ -2965,6 +2965,7 @@ String *Item_func_compress::val_str(String *str)
null_value= 1; null_value= 1;
return 0; return 0;
} }
null_value= 0;
if (res->is_empty()) return res; if (res->is_empty()) return res;
/* /*