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added compress/uncompress function

Browse Source 
sql/mysql_priv.h:
  added have_compress variable
sql/mysqld.cc:
  added have_compress variable
sql/set_var.cc:
  added have_compress variable
This commit is contained in:
unknown
2003-04-09 20:50:30 -04:00
parent 90527436fa
commit 75bdeb1b21
38 changed files with 332 additions and 2 deletions
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35
mysql-test/r/func_compress.result Normal file
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@ -0,0 +1,35 @@
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
select uncompress(@test_compress_string);
uncompress(@test_compress_string)
NULL
Warnings:
Error 1254 Too big size of uncompressed data. The maximum size is 8192. (probably, length of uncompressed data was corrupted)
select uncompressed_length(compress(@test_compress_string))=length(@test_compress_string);
uncompressed_length(compress(@test_compress_string))=length(@test_compress_string)
1
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)) type=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;