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9bc874a594
Let us introduce the parameter innodb_read_only_compressed that is ON by default, making any ROW_FORMAT=COMPRESSED tables read-only. I developed the ROW_FORMAT=COMPRESSED format based on Heikki Tuuri's rough design between 2005 and 2008. It might have been a good idea back then, but no proper benchmarks were ever run to validate the design or the implementation. The format has been more or less obsolete for years. It limits innodb_page_size to 16384 bytes (the default), and instant ALTER TABLE is not supported. This is the first step towards deprecating and removing write support for ROW_FORMAT=COMPRESSED tables.
67 lines
1.8 KiB
Text
67 lines
1.8 KiB
Text
--source include/have_innodb.inc
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--disable_query_log
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SET @save_innodb_read_only_compressed=@@GLOBAL.innodb_read_only_compressed;
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SET GLOBAL innodb_read_only_compressed=OFF;
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--enable_query_log
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create table t (a int NOT NULL) engine=innodb row_format= compressed;
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--error ER_ALTER_OPERATION_NOT_SUPPORTED
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alter table t modify a int NULL, algorithm=instant;
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--disable_query_log
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SET GLOBAL innodb_read_only_compressed=@save_innodb_read_only_compressed;
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--enable_query_log
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drop table t;
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create table t (a int NOT NULL) engine=innodb row_format= dynamic;
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--error ER_ALTER_OPERATION_NOT_SUPPORTED
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alter table t modify a int NULL, algorithm=instant;
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drop table t;
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create table t (a int NOT NULL) engine=innodb row_format= compact;
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--error ER_ALTER_OPERATION_NOT_SUPPORTED
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alter table t modify a int NULL, algorithm=instant;
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drop table t;
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create table t (
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id int primary key,
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a int NOT NULL default 0,
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b int NOT NULL default 0,
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c int NOT NULL default 0,
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index idx (a,b,c)
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) engine=innodb row_format=redundant;
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--error ER_BAD_NULL_ERROR
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insert into t (id, a) values (0, NULL);
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--error ER_BAD_NULL_ERROR
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insert into t (id, b) values (0, NULL);
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--error ER_BAD_NULL_ERROR
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insert into t (id, c) values (0, NULL);
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insert into t values (1,1,1,1);
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set @id = (select table_id from information_schema.innodb_sys_tables
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where name = 'test/t');
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--replace_column 1 TABLE_ID
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select * from information_schema.innodb_sys_columns where table_id=@id;
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alter table t modify a int NULL, algorithm=instant;
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insert into t values (2, NULL, 2, 2);
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alter table t modify b int NULL, algorithm=nocopy;
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insert into t values (3, NULL, NULL, 3);
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alter table t modify c int NULL, algorithm=inplace;
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insert into t values (4, NULL, NULL, NULL);
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--replace_column 1 TABLE_ID
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select * from information_schema.innodb_sys_columns where table_id=@id;
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select * from t;
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check table t;
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drop table t;
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