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# ############################################################# # wl6747 : Set merge threshold at index level # Check with CREATE INDEX on all datatypes # Check with by ALTER TABLE MODIFY COLUMN TYPE # Check with ALTER TABLE ADD Index # Check by setting at index level with CREATE TABLE # Check with BLOB column at index level with CREATE Index # Check with row_format=compressed and key_block_size=8k # Check withe valid and invalid merge_threshold values. # # Check actual behavior for table, partitioned table and temporary table # ############################################################# --source include/have_innodb_16k.inc --source include/have_debug.inc # Check index merge threshold by create index on all datatypes CREATE TABLE tab(a BIGINT PRIMARY KEY,c1 TINYTEXT,c2 TEXT,c3 MEDIUMTEXT, c4 TINYBLOB,c5 BLOB,c6 MEDIUMBLOB,c7 LONGBLOB) ENGINE=InnoDB; # check index merge threshold on all datatypes CREATE INDEX index1 ON tab(c1(255)) COMMENT 'Check index level merge MERGE_THRESHOLD=51'; CREATE INDEX index2 ON tab(c2(750)) COMMENT 'Check index level merge MERGE_THRESHOLD=-1'; CREATE INDEX index3 ON tab(c3(750)) COMMENT 'Check index level merge MERGE_THRESHOLD=20'; CREATE INDEX index4 ON tab(c4(255)) COMMENT 'Check index level merge MERGE_THRESHOLD=25'; CREATE INDEX index5 ON tab(c5(750)) COMMENT 'Check index level merge MERGE_THRESHOLD=30'; CREATE INDEX index6 ON tab(c6(750)) COMMENT 'Check index level merge MERGE_THRESHOLD=35'; CREATE INDEX index7 ON tab(c7(750)) COMMENT 'Check index level merge MERGE_THRESHOLD=40'; SHOW CREATE TABLE tab; SELECT t.NAME as TABLE_NAME, i.NAME as INDEX_NAME, i.MERGE_THRESHOLD FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES t, INFORMATION_SCHEMA.INNODB_SYS_INDEXES i WHERE t.TABLE_ID = i.TABLE_ID AND t.NAME = 'test/tab'; ALTER TABLE tab comment='MERGE_THRESHOLD=49'; SHOW CREATE TABLE tab; SELECT t.NAME as TABLE_NAME, i.NAME as INDEX_NAME, i.MERGE_THRESHOLD FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES t, INFORMATION_SCHEMA.INNODB_SYS_INDEXES i WHERE t.TABLE_ID = i.TABLE_ID AND t.NAME = 'test/tab'; ALTER TABLE tab MODIFY COLUMN c7 VARCHAR(2048) ; SHOW CREATE TABLE tab; SELECT t.NAME as TABLE_NAME, i.NAME as INDEX_NAME, i.MERGE_THRESHOLD FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES t, INFORMATION_SCHEMA.INNODB_SYS_INDEXES i WHERE t.TABLE_ID = i.TABLE_ID AND t.NAME = 'test/tab'; ALTER TABLE tab ADD INDEX index8 (c7(750)) COMMENT 'Check index level merge MERGE_THRESHOLD=45'; SHOW CREATE TABLE tab; SELECT t.NAME as TABLE_NAME, i.NAME as INDEX_NAME, i.MERGE_THRESHOLD FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES t, INFORMATION_SCHEMA.INNODB_SYS_INDEXES i WHERE t.TABLE_ID = i.TABLE_ID AND t.NAME = 'test/tab'; # Cleanup DROP TABLE tab; --echo # --echo # behavior for deleting records --echo # --echo # test to confirm behavior (MERGE_THRESHOLD=50 (default)) CREATE TABLE tab1 (a bigint primary key, b varchar(2048)) engine=InnoDB; --source suite/innodb/include/innodb_merge_threshold_delete.inc DROP TABLE tab1; --echo # test to confirm behavior (MERGE_THRESHOLD=35) CREATE TABLE tab1 (a bigint primary key, b varchar(2048)) engine=InnoDB COMMENT='MERGE_THRESHOLD=35'; --source suite/innodb/include/innodb_merge_threshold_delete.inc DROP TABLE tab1; --echo # test to confirm behavior (MERGE_THRESHOLD=25) CREATE TABLE tab1 (a bigint primary key, b varchar(2048)) engine=InnoDB COMMENT='MERGE_THRESHOLD=25'; --source suite/innodb/include/innodb_merge_threshold_delete.inc DROP TABLE tab1; --echo # test to confirm partitioned table (MERGE_THRESHOLD=35) CREATE TABLE tab1 (a bigint primary key, b varchar(2048)) COMMENT='MERGE_THRESHOLD=35' PARTITION BY RANGE (a) (PARTITION p0 VALUES LESS THAN (20) ENGINE = InnoDB, PARTITION p1 VALUES LESS THAN MAXVALUE ENGINE = InnoDB); --source suite/innodb/include/innodb_merge_threshold_delete.inc DROP TABLE tab1; --echo # --echo # behavior for updating to smaller records --echo # --echo # test to confirm behavior (MERGE_THRESHOLD=50 (default)) CREATE TABLE tab1 (a bigint primary key, b varchar(2048)) engine=InnoDB; --source suite/innodb/include/innodb_merge_threshold_update.inc DROP TABLE tab1; --echo # test to confirm behavior (MERGE_THRESHOLD=35) CREATE TABLE tab1 (a bigint primary key, b varchar(2048)) engine=InnoDB COMMENT='MERGE_THRESHOLD=35'; --source suite/innodb/include/innodb_merge_threshold_update.inc DROP TABLE tab1; --echo # test to confirm behavior (MERGE_THRESHOLD=25) CREATE TABLE tab1 (a bigint primary key, b varchar(2048)) engine=InnoDB COMMENT='MERGE_THRESHOLD=25'; --source suite/innodb/include/innodb_merge_threshold_update.inc DROP TABLE tab1; --echo # test to confirm explicit temporary table (MERGE_THRESHOLD=35) --echo # (though not registered to SYS_TABLES,SYS_INDEXES, it works correctly) # Temporary tables are not purged. so deleting records is not caused # So, should be tested by updating case only CREATE TEMPORARY TABLE tab1 (a bigint primary key, b varchar(2048)) engine=InnoDB COMMENT='MERGE_THRESHOLD=35'; --source suite/innodb/include/innodb_merge_threshold_update.inc DROP TABLE tab1; --echo # --echo # behavior for secondary index with blob --echo # --echo # test to confirm behavior (MERGE_THRESHOLD=50 (default)) # not to cause page operation at primary key, row_format=dynamic and the key is blob CREATE TABLE tab1 (a bigint primary key, b blob) engine=InnoDB row_format=dynamic; CREATE INDEX index1 ON tab1(b(750)); --source suite/innodb/include/innodb_merge_threshold_secondary.inc DROP TABLE tab1; --echo # test to confirm behavior (MERGE_THRESHOLD=45) CREATE TABLE tab1 (a bigint primary key, b blob) engine=InnoDB row_format=dynamic; CREATE INDEX index1 ON tab1(b(750)) COMMENT 'MERGE_THRESHOLD=45'; --source suite/innodb/include/innodb_merge_threshold_secondary.inc DROP TABLE tab1; --echo # test to confirm behavior (MERGE_THRESHOLD=40) CREATE TABLE tab1 (a bigint primary key, b blob) engine=InnoDB row_format=dynamic; CREATE INDEX index1 ON tab1(b(750)) COMMENT 'MERGE_THRESHOLD=40'; --source suite/innodb/include/innodb_merge_threshold_secondary.inc DROP TABLE tab1; --echo # compressed table behaves same (MERGE_THRESHOLD=45) CREATE TABLE tab1 (a bigint primary key, b blob) engine=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=8; CREATE INDEX index1 ON tab1(b(750)) COMMENT 'MERGE_THRESHOLD=45'; --source suite/innodb/include/innodb_merge_threshold_secondary.inc DROP TABLE tab1;