mirror of
https://github.com/MariaDB/server.git
synced 2025-01-18 13:02:28 +01:00
60a21d1697
We don't set null_value to 0 in the Item_func_compress::val_str() for not-NULL results. mysql-test/r/func_compress.result: Fix for bug #23254: COMPRESS(NULL) makes all futher COMPRESS() calls on same Item return NULL - test result. mysql-test/t/func_compress.test: Fix for bug #23254: COMPRESS(NULL) makes all futher COMPRESS() calls on same Item return NULL - test case. sql/item_strfunc.cc: Fix for bug #23254: COMPRESS(NULL) makes all futher COMPRESS() calls on same Item return NULL - set null_value.
69 lines
2 KiB
Text
69 lines
2 KiB
Text
-- source include/have_compress.inc
|
|
#
|
|
# Test for compress and uncompress functions:
|
|
#
|
|
|
|
select @test_compress_string:='string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ';
|
|
select length(@test_compress_string);
|
|
|
|
select uncompress(compress(@test_compress_string));
|
|
explain extended select uncompress(compress(@test_compress_string));
|
|
select uncompressed_length(compress(@test_compress_string))=length(@test_compress_string);
|
|
explain extended select uncompressed_length(compress(@test_compress_string))=length(@test_compress_string);
|
|
select uncompressed_length(compress(@test_compress_string));
|
|
select length(compress(@test_compress_string))<length(@test_compress_string);
|
|
|
|
create table t1 (a text, b char(255), c char(4)) engine=myisam;
|
|
insert into t1 (a,b,c) values (compress(@test_compress_string),compress(@test_compress_string),'d ');
|
|
select uncompress(a) from t1;
|
|
select uncompress(b) from t1;
|
|
select concat('|',c,'|') from t1;
|
|
drop table t1;
|
|
|
|
select compress("");
|
|
select uncompress("");
|
|
select uncompress(compress(""));
|
|
select uncompressed_length("");
|
|
|
|
#
|
|
# errors
|
|
#
|
|
|
|
create table t1 (a text);
|
|
insert t1 values (compress(null)), ('A\0\0\0BBBBBBBB'), (compress(space(50000))), (space(50000));
|
|
select length(a) from t1;
|
|
select length(uncompress(a)) from t1;
|
|
drop table t1;
|
|
|
|
|
|
#
|
|
# Bug #5497: a problem with large strings
|
|
# note that when LOW_MEMORY is set the "test" below is meaningless
|
|
#
|
|
|
|
set @@max_allowed_packet=1048576*100;
|
|
--replace_result "''" XXX "'1'" XXX
|
|
eval select compress(repeat('aaaaaaaaaa', IF('$LOW_MEMORY', 10, 10000000))) is null;
|
|
|
|
#
|
|
# Bug #18643: problem with null values
|
|
#
|
|
|
|
create table t1(a blob);
|
|
insert into t1 values(NULL), (compress('a'));
|
|
select uncompress(a), uncompressed_length(a) from t1;
|
|
drop table t1;
|
|
|
|
#
|
|
# 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
|