Help Center/ GaussDB(DWS)/ Tool Guide/ DSC/ MySQL Syntax Migrating/ Indexes/ Full-Text Indexes
Updated on 2024-07-19 GMT+08:00
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Full-Text Indexes

GaussDB(DWS) does not support full-text indexes. DSC will perform adaptation based on GaussDB(DWS) features during migration.

  1. Inline full-text index

    Input

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    ## A.
CREATE TABLE `public`.`test_create_table02` (
	`ID` INT(11) NOT NULL PRIMARY KEY,
	`TITLE` CHAR(255) NOT NULL,
	`CONTENT` TEXT NULL,
	`CREATE_TIME` DATETIME NULL DEFAULT NULL,
	 FULLTEXT (`CONTENT`)
);

## B. 
CREATE TABLE IF NOT EXISTS `public`.`runoob_dataType_test`
(
  `id` INT PRIMARY KEY AUTO_INCREMENT,
  `name` VARCHAR(128) NOT NULL,
  FULLTEXT INDEX (name)
);

## C.
CREATE TABLE IF NOT EXISTS `public`.`runoob_dataType_test`
(
  `id` INT PRIMARY KEY AUTO_INCREMENT,
  `name` VARCHAR(128) NOT NULL,
  FULLTEXT INDEX (name ASC)
);

    Output

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    -- A.
CREATE TABLE "public"."test_create_table02"
(
  "id" INTEGER NOT NULL PRIMARY KEY,
  "title" CHAR(1020) NOT NULL,
  "content" TEXT,
  "create_time" TIMESTAMP WITHOUT TIME ZONE DEFAULT NULL
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("id");
CREATE INDEX "idx_test_create_table02_content" ON "public"."test_create_table02" USING GIN(to_tsvector(coalesce("content",'')));

-- B. 
CREATE TABLE IF NOT EXISTS "public"."runoob_datatype_test"
(
  "id" SERIAL PRIMARY KEY,
  "name" VARCHAR(512) NOT NULL
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("id");
CREATE INDEX "idx_runoob_datatype_test_name" ON "public"."runoob_datatype_test" USING GIN(to_tsvector(coalesce("name",'')));

-- C.
CREATE TABLE IF NOT EXISTS "public"."runoob_datatype_test"
(
  "id" SERIAL PRIMARY KEY,
  "name" VARCHAR(512) NOT NULL
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("id");
CREATE INDEX "idx_runoob_datatype_test_name" ON "public"."runoob_datatype_test" USING GIN(to_tsvector(coalesce("name",'')));
  2. Full-text index created by ALTER TABLE

    Input

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    CREATE TABLE `public`.`test_create_table05` (
 `ID` INT(11) NOT NULL AUTO_INCREMENT,
 `USER_ID` INT(20) NOT NULL,
 `USER_NAME` CHAR(20) NULL DEFAULT NULL,
 `DETAIL` VARCHAR(100) NULL DEFAULT NULL,
 PRIMARY KEY (`ID`)
);
ALTER TABLE TEST_CREATE_TABLE05 ADD FULLTEXT INDEX USER_ID_INDEX_02(USER_ID);
ALTER TABLE TEST_CREATE_TABLE05 ADD FULLTEXT USER_NAME_INDEX_02(USER_NAME);

    Output

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    CREATE TABLE "public"."test_create_table05"
(
  "id" SERIAL NOT NULL,
  "user_id" INTEGER NOT NULL,
  "user_name" CHAR(80) DEFAULT NULL,
  "detail" VARCHAR(400) DEFAULT NULL,
  PRIMARY KEY ("id")
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("id");
CREATE INDEX "user_id_index_02" ON "public"."test_create_table05" USING GIN(to_tsvector(coalesce("user_id",'')));
CREATE INDEX "user_name_index_02" ON "public"."test_create_table05" USING GIN(to_tsvector(coalesce("user_name",'')));
  3. Full-text index created by CREATE INDEX

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    CREATE TABLE `public`.`test_index_table02` (
	`ID` INT(11) NOT NULL PRIMARY KEY,
	`TITLE` CHAR(255) NOT NULL,
	`CONTENT` TEXT NULL,
	`CREATE_TIME` INT(10) NULL DEFAULT NULL
);
CREATE FULLTEXT INDEX CON_INDEX ON TEST_INDEX_TABLE02(CONTENT);

    Output

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    CREATE TABLE "public"."test_index_table02"
(
  "id" INTEGER NOT NULL PRIMARY KEY,
  "title" CHAR(1020) NOT NULL,
  "content" TEXT,
  "create_time" INTEGER DEFAULT NULL
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("id");
CREATE INDEX "con_index" ON "public"."test_index_table02" USING GIN(to_tsvector(coalesce("content",'')));
Parent topic: Indexes