mirror of
https://github.com/MariaDB/server.git
synced 2025-10-24 07:13:33 +03:00
63e56390a3
WL#2265 (RESIGNAL) Manual merge of SIGNAL and RESIGNAL to mysql-trunk-signal, plus required dependencies.
130 lines
4.8 KiB
Plaintext
130 lines
4.8 KiB
Plaintext
select @test_compress_string:='string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ';
|
|
@test_compress_string:='string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa '
|
|
string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
|
select length(@test_compress_string);
|
|
length(@test_compress_string)
|
|
117
|
|
select uncompress(compress(@test_compress_string));
|
|
uncompress(compress(@test_compress_string))
|
|
string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
|
explain extended select uncompress(compress(@test_compress_string));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 select uncompress(compress((@test_compress_string))) AS `uncompress(compress(@test_compress_string))`
|
|
select uncompressed_length(compress(@test_compress_string))=length(@test_compress_string);
|
|
uncompressed_length(compress(@test_compress_string))=length(@test_compress_string)
|
|
1
|
|
explain extended select uncompressed_length(compress(@test_compress_string))=length(@test_compress_string);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 select (uncompressed_length(compress((@test_compress_string))) = length((@test_compress_string))) AS `uncompressed_length(compress(@test_compress_string))=length(@test_compress_string)`
|
|
select uncompressed_length(compress(@test_compress_string));
|
|
uncompressed_length(compress(@test_compress_string))
|
|
117
|
|
select length(compress(@test_compress_string))<length(@test_compress_string);
|
|
length(compress(@test_compress_string))<length(@test_compress_string)
|
|
1
|
|
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;
|
|
uncompress(a)
|
|
string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
|
select uncompress(b) from t1;
|
|
uncompress(b)
|
|
string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
|
select concat('|',c,'|') from t1;
|
|
concat('|',c,'|')
|
|
|d|
|
|
drop table t1;
|
|
select compress("");
|
|
compress("")
|
|
|
|
select uncompress("");
|
|
uncompress("")
|
|
|
|
select uncompress(compress(""));
|
|
uncompress(compress(""))
|
|
|
|
select uncompressed_length("");
|
|
uncompressed_length("")
|
|
0
|
|
create table t1 (a text);
|
|
insert t1 values (compress(null)), ('A\0\0\0BBBBBBBB'), (compress(space(50000))), (space(50000));
|
|
select length(a) from t1;
|
|
length(a)
|
|
NULL
|
|
12
|
|
76
|
|
50000
|
|
select length(uncompress(a)) from t1;
|
|
length(uncompress(a))
|
|
NULL
|
|
NULL
|
|
50000
|
|
NULL
|
|
Warnings:
|
|
Warning 1259 ZLIB: Input data corrupted
|
|
Warning 1256 Uncompressed data size too large; the maximum size is 1048576 (probably, length of uncompressed data was corrupted)
|
|
drop table t1;
|
|
set @@global.max_allowed_packet=1048576*100;
|
|
select compress(repeat('aaaaaaaaaa', IF(XXX, 10, 10000000))) is null;
|
|
compress(repeat('aaaaaaaaaa', IF(XXX, 10, 10000000))) is null
|
|
0
|
|
set @@global.max_allowed_packet=default;
|
|
create table t1(a blob);
|
|
insert into t1 values(NULL), (compress('a'));
|
|
select uncompress(a), uncompressed_length(a) from t1;
|
|
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;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 system NULL NULL NULL NULL 1
|
|
Warnings:
|
|
Warning 1259 ZLIB: Input data corrupted
|
|
select * from t1 where uncompress(a) is null;
|
|
a
|
|
foo
|
|
Warnings:
|
|
Warning 1259 ZLIB: Input data corrupted
|
|
explain select *, uncompress(a) from t1;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 system NULL NULL NULL NULL 1
|
|
select *, uncompress(a) from t1;
|
|
a uncompress(a)
|
|
foo NULL
|
|
Warnings:
|
|
Warning 1259 ZLIB: Input data corrupted
|
|
select *, uncompress(a), uncompress(a) is null from t1;
|
|
a uncompress(a) uncompress(a) is null
|
|
foo NULL 1
|
|
Warnings:
|
|
Warning 1259 ZLIB: Input data corrupted
|
|
Warning 1259 ZLIB: Input data corrupted
|
|
drop table t1;
|
|
CREATE TABLE t1 (c1 INT);
|
|
INSERT INTO t1 VALUES (1), (1111), (11111);
|
|
SELECT UNCOMPRESS(c1), UNCOMPRESSED_LENGTH(c1) FROM t1;
|
|
UNCOMPRESS(c1) UNCOMPRESSED_LENGTH(c1)
|
|
NULL NULL
|
|
NULL NULL
|
|
NULL 825307441
|
|
EXPLAIN EXTENDED SELECT * FROM (SELECT UNCOMPRESSED_LENGTH(c1) FROM t1) AS s;
|
|
DROP TABLE t1;
|
|
End of 5.0 tests
|