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)/ ROW_FORMAT
Updated on 2024-07-19 GMT+08:00
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ROW_FORMAT

ROW_FORMAT defines the physical format in which the rows are stored. Row format choices vary depending on the storage engine used for the table. If you specify a row format that is not supported by the storage engine that is used for the table, the table will be created using that storage engine's default row format. If ROW_FORMAT is set to DEFAULT, the value will be migrated to SET NOCOMPRESS. If ROW_FORMAT is set to COMPRESSED, the value will be migrated to SET COMPRESS. GaussDB(DWS) supports only the preceding two ROW_FORMAT values. If other values are used, they will be deleted by DSC.

Input

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CREATE TABLE `public`.`runoob_alter_test`(
    `dataType1` int NOT NULL AUTO_INCREMENT,
    `dataType2` FLOAT(10,2),
    `dataType3` DOUBLE(20,8),
    `dataType4` TEXT NOT NULL,
    PRIMARY KEY(`dataType1`)
) ENGINE=InnoDB;

## A.
ALTER TABLE runoob_alter_test ROW_FORMAT DEFAULT;
ALTER TABLE runoob_alter_test ROW_FORMAT=DEFAULT;

## B.
ALTER TABLE runoob_alter_test ROW_FORMAT DYNAMIC;
ALTER TABLE runoob_alter_test ROW_FORMAT=DYNAMIC;

## C.
ALTER TABLE runoob_alter_test ROW_FORMAT COMPRESSED;
ALTER TABLE runoob_alter_test ROW_FORMAT=COMPRESSED;

## D.
ALTER TABLE runoob_alter_test ROW_FORMAT REDUNDANT;
ALTER TABLE runoob_alter_test ROW_FORMAT=REDUNDANT;

## E.
ALTER TABLE runoob_alter_test ROW_FORMAT COMPACT;
ALTER TABLE runoob_alter_test ROW_FORMAT=COMPACT;

Output

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CREATE TABLE "public"."runoob_alter_test"
(
  "datatype1" SERIAL NOT NULL,
  "datatype2" REAL,
  "datatype3" DOUBLE PRECISION,
  "datatype4" TEXT NOT NULL,
  PRIMARY KEY ("datatype1")
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("datatype1");

-- A.
ALTER TABLE "public"."runoob_alter_test" SET NOCOMPRESS;
ALTER TABLE "public"."runoob_alter_test" SET NOCOMPRESS;

-- B.

-- C.
ALTER TABLE "public"."runoob_alter_test" SET COMPRESS;
ALTER TABLE "public"."runoob_alter_test" SET COMPRESS;

-- D.

-- E.