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into sunlight.local:/local_work/tmp_merge-5.1-opt-mysql mysql-test/r/auto_increment.result: Auto merged mysql-test/r/binlog_row_blackhole.result: Auto merged mysql-test/r/binlog_stm_blackhole.result: Auto merged mysql-test/r/date_formats.result: Auto merged mysql-test/r/func_compress.result: Auto merged mysql-test/r/func_gconcat.result: Auto merged mysql-test/r/func_group.result: Auto merged mysql-test/r/func_math.result: Auto merged mysql-test/r/func_str.result: Auto merged mysql-test/r/func_system.result: Auto merged mysql-test/r/func_time.result: Auto merged mysql-test/r/gis.result: Auto merged mysql-test/r/group_by.result: Auto merged mysql-test/r/group_min_max.result: Auto merged mysql-test/r/myisam.result: Auto merged mysql-test/r/olap.result: Auto merged mysql-test/r/partition_pruning.result: Auto merged mysql-test/r/query_cache.result: Auto merged mysql-test/r/rpl_get_lock.result: Auto merged mysql-test/r/rpl_master_pos_wait.result: Auto merged mysql-test/r/select.result: Auto merged mysql-test/r/subselect.result: Auto merged mysql-test/r/type_blob.result: Auto merged mysql-test/r/union.result: Auto merged mysql-test/r/variables.result: Auto merged mysql-test/r/view.result: Auto merged mysql-test/t/group_min_max.test: Auto merged mysql-test/t/partition_pruning.test: Auto merged sql/opt_range.cc: Auto merged sql/sql_class.cc: Auto merged sql/sql_select.cc: Auto merged sql/table.h: Auto merged
81 lines
3.4 KiB
Text
81 lines
3.4 KiB
Text
select @test_compress_string:='string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ';
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@test_compress_string:='string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa '
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string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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select length(@test_compress_string);
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length(@test_compress_string)
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117
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select uncompress(compress(@test_compress_string));
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uncompress(compress(@test_compress_string))
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string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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explain extended select uncompress(compress(@test_compress_string));
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select uncompress(compress((@test_compress_string))) AS `uncompress(compress(@test_compress_string))`
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select uncompressed_length(compress(@test_compress_string))=length(@test_compress_string);
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uncompressed_length(compress(@test_compress_string))=length(@test_compress_string)
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1
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explain extended select uncompressed_length(compress(@test_compress_string))=length(@test_compress_string);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select (uncompressed_length(compress((@test_compress_string))) = length((@test_compress_string))) AS `uncompressed_length(compress(@test_compress_string))=length(@test_compress_string)`
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select uncompressed_length(compress(@test_compress_string));
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uncompressed_length(compress(@test_compress_string))
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117
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select length(compress(@test_compress_string))<length(@test_compress_string);
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length(compress(@test_compress_string))<length(@test_compress_string)
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1
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create table t1 (a text, b char(255), c char(4)) engine=myisam;
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insert into t1 (a,b,c) values (compress(@test_compress_string),compress(@test_compress_string),'d ');
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select uncompress(a) from t1;
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uncompress(a)
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string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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select uncompress(b) from t1;
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uncompress(b)
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string for test compress function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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select concat('|',c,'|') from t1;
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concat('|',c,'|')
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|d|
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drop table t1;
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select compress("");
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compress("")
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select uncompress("");
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uncompress("")
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select uncompress(compress(""));
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uncompress(compress(""))
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select uncompressed_length("");
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uncompressed_length("")
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0
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create table t1 (a text);
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insert t1 values (compress(null)), ('A\0\0\0BBBBBBBB'), (compress(space(50000))), (space(50000));
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select length(a) from t1;
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length(a)
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NULL
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12
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76
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50000
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select length(uncompress(a)) from t1;
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length(uncompress(a))
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NULL
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NULL
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50000
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NULL
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Warnings:
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Error 1259 ZLIB: Input data corrupted
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Error 1256 Uncompressed data size too large; the maximum size is 1048576 (probably, length of uncompressed data was corrupted)
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drop table t1;
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set @@max_allowed_packet=1048576*100;
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select compress(repeat('aaaaaaaaaa', IF(XXX, 10, 10000000))) is null;
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compress(repeat('aaaaaaaaaa', IF(XXX, 10, 10000000))) is null
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0
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create table t1(a blob);
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insert into t1 values(NULL), (compress('a'));
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select uncompress(a), uncompressed_length(a) from t1;
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uncompress(a) uncompressed_length(a)
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NULL NULL
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a 1
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drop table t1;
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