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SET @save_innodb_stats_persistent = @@GLOBAL.innodb_stats_persistent;
SET GLOBAL innodb_stats_persistent = OFF;
SET @save_innodb_compression_level = @@global.innodb_compression_level;
SET global innodb_compression_level=0;
#create table with 1K block size
CREATE TABLE tab5 (col_1 CHAR (255) ,
col_2 VARCHAR (121), col_3 longtext,
col_4 longtext,col_5 longtext,
col_6 longtext , col_7 longtext ,
col_8 longtext ,col_9 longtext ,
col_10 longtext ,col_11 int auto_increment primary key)
ENGINE = innodb ROW_FORMAT=compressed key_block_size=1;
#create indexes
CREATE INDEX idx1 ON tab5(col_4(10));
CREATE INDEX idx2 ON tab5(col_5(10));
CREATE INDEX idx3 ON tab5(col_6(10));
CREATE INDEX idx4 ON tab5(col_7(10));
CREATE INDEX idx5 ON tab5(col_8(10));
CREATE INDEX idx6 ON tab5(col_11);
#load the with repeat function
SET @col_1 = repeat('a', 100);
SET @col_2 = repeat('b', 100);
SET @col_3 = repeat('c', 100);
SET @col_4 = repeat('d', 100);
SET @col_5 = repeat('e', 100);
SET @col_6 = repeat('f', 100);
SET @col_7 = repeat('g', 100);
SET @col_8 = repeat('h', 100);
SET @col_9 = repeat('i', 100);
SET @col_10 = repeat('j', 100);
#insert 10 records
BEGIN;
INSERT INTO tab5(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab5(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab5(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab5(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab5(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab5(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab5(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab5(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab5(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab5(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
COMMIT;
#set the compression level=9 (High compress)
SET global innodb_compression_level=9;
#create table with 1K block size
CREATE TABLE tab6 (col_1 CHAR (255) ,
col_2 VARCHAR (121), col_3 longtext,
col_4 longtext,col_5 longtext,
col_6 longtext , col_7 longtext ,
col_8 longtext ,col_9 longtext ,
col_10 longtext ,col_11 int auto_increment primary key)
ENGINE = innodb ROW_FORMAT=compressed key_block_size=1;
#create indexes
CREATE INDEX idx1 ON tab6(col_4(10));
CREATE INDEX idx2 ON tab6(col_5(10));
CREATE INDEX idx3 ON tab6(col_6(10));
CREATE INDEX idx4 ON tab6(col_7(10));
CREATE INDEX idx5 ON tab6(col_8(10));
CREATE INDEX idx6 ON tab6(col_11);
#insert 10 records
BEGIN;
INSERT INTO tab6(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab6(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab6(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab6(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab6(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab6(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab6(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab6(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab6(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
INSERT INTO tab6(col_1,col_2,col_3,col_4,col_5,col_6,col_7,col_8,col_9,col_10)
VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,@col_7,@col_8,@col_9,@col_10);
COMMIT;
#diff the sizes of the No compressed table and high compressed table
SET @size=(SELECT
(SELECT (SUM(DATA_LENGTH+INDEX_LENGTH)/1024/1024)
FROM INFORMATION_SCHEMA.TABLES
WHERE table_name='tab5' AND ENGINE='InnoDB' AND table_schema='test')
-
(SELECT SUM(DATA_LENGTH+INDEX_LENGTH)/1024/1024
FROM INFORMATION_SCHEMA.TABLES
WHERE table_name='tab6' AND ENGINE='InnoDB' AND table_schema='test')
FROM DUAL);
#check the size of the table, it should not be Negative value
#The results of this query Test pass = 1 and fail=0
SELECT @size >= 0;
@size >= 0
1
DROP TABLE tab5, tab6;
SET GLOBAL innodb_compression_level = @save_innodb_compression_level;
SET GLOBAL innodb_stats_persistent = @save_innodb_stats_persistent;
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