Help Center/ GaussDB(DWS)/ Tool Guide/ DSC/ SQL Syntax Migration Reference/ MySQL Syntax Migrating/ Schema Objects and Data Definition Language (DDL)/ Table (Optional Parameters and Operations)/ ENGINE
Updated on 2024-07-19 GMT+08:00
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ENGINE

In MySQL, ENGINE specifies the storage engine for a table. When the storage engine is ARCHIVE, BLACKHOLE, CSV, FEDERATED, INNODB, MYISAM, MEMORY, MRG_MYISAM, NDB, NDBCLUSTER, or PERFORMANCE_SCHEMA, this attribute can be migrated and will be deleted during the migration.

Input

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CREATE TABLE `public`.`runoob_alter_test`(    
`dataType1` int NOT NULL,    
`dataType2` DOUBLE(20,8),        
PRIMARY KEY(`dataType1`)
)ENGINE=MYISAM;

## A.
ALTER TABLE runoob_alter_test ENGINE INNODB;
ALTER TABLE runoob_alter_test ENGINE=INNODB;

## B.
ALTER TABLE runoob_alter_test ENGINE MYISAM;
ALTER TABLE runoob_alter_test ENGINE=MYISAM;

## C.
ALTER TABLE runoob_alter_test ENGINE MEMORY;
ALTER TABLE runoob_alter_test ENGINE=MEMORY;

Output

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CREATE TABLE "public"."runoob_alter_test"
(
  "datatype1" INTEGER NOT NULL,
  "datatype2" DOUBLE PRECISION,
  PRIMARY KEY ("datatype1")
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("datatype1");

-- A.

-- B.

-- C.