Commit 4a488c06 authored by unknown's avatar unknown
Browse files

Merge rkalimullin@bk-internal.mysql.com:/home/bk/mysql-5.1-maint 

into  mysql.com:/usr/home/ram/work/bug23254/my51-bug23254
parents e892ca2a 20a2a997

mysql-test/r/func_compress.result

+10 −0
Original line number Diff line number Diff line
@@ -79,6 +79,16 @@ uncompress(a) uncompressed_length(a) 
NULL	NULL

a	1

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);

insert into t1 values ('foo');

explain select * from t1 where uncompress(a) is null;

mysql-test/t/func_compress.test

+13 −1
Original line number Diff line number Diff line
@@ -56,7 +56,19 @@ insert into t1 values(NULL), (compress('a')); 
select uncompress(a), uncompressed_length(a) from 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?

sql/item_strfunc.cc

+1 −0
Original line number Diff line number Diff line
@@ -2965,6 +2965,7 @@ String *Item_func_compress::val_str(String *str) 
    null_value= 1;

    return 0;

  }

  null_value= 0;

  if (res->is_empty()) return res;



  /*