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

GaussDB(DWS) does not support table definition modification using this attribute. DSC will delete the attribute during migration.

In MySQL, the keyword CONNECTION is used as a referenced, external data source. Currently, DSC cannot completely migrate the feature of CONNECTION. So as a workaround, it simply deletes the keyword.

Input

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CREATE TABLE `public`.`runoob_alter_test`(
    `dataType1` int NOT NULL AUTO_INCREMENT,
    `dataType2` DOUBLE(20,8),
    `dataType3` TEXT NOT NULL,
    `dataType4` YEAR NOT NULL DEFAULT '2018',
    PRIMARY KEY(`dataType1`)
);

ALTER TABLE runoob_alter_test CONNECTION 'hello';
ALTER TABLE runoob_alter_test CONNECTION='hello';

Output

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CREATE TABLE "public"."runoob_alter_test"
(
  "datatype1" SERIAL NOT NULL,
  "datatype2" DOUBLE PRECISION,
  "datatype3" TEXT NOT NULL,
  "datatype4" SMALLINT NOT NULL DEFAULT '2018',
  PRIMARY KEY ("datatype1")
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("datatype1");