Help Center/ GaussDB(DWS)/ Tool Guide/ DSC/ SQL Syntax Migration Reference/ MySQL Syntax Migrating/ Data Types/ Date/Time Types
Updated on 2024-07-19 GMT+08:00
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Date/Time Types

Overview

This section describes the following date and time types: DATETIME, TIME, TIMESTAMP, and YEAR. GaussDB(DWS) does not support these types, and DSC will convert them.

Type Mapping

Table 1 Date/Time type mapping

MySQL Date/Time Type

MySQL INPUT

GaussDB(DWS) OUTPUT

DATETIME

DATETIME[(fsp)]

TIMESTAMP[(fsp)] WITHOUT TIME ZONE

TIME

TIME[(fsp)]

TIME[(fsp)] WITHOUT TIME ZONE

TIMESTAMP

TIMESTAMP[(fsp)]

TIMESTAMP[(fsp)] WITH TIME ZONE

YEAR

YEAR[(4)]

SMALLINT(4)

The value of fsp must be in the range [0, 6]. Value 0 indicates no decimal. If this parameter is omitted, the default precision will be 0.

Input: DATETIME

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CREATE TABLE IF NOT EXISTS `runoob_dataType_test`(
    `dataType_1` DATETIME,
    `dataType_2` DATETIME(0),
    `dataType_3` DATETIME(6),
    `dataType_4` DATETIME DEFAULT NULL,
    `dataType_5` DATETIME DEFAULT '2018-10-12 15:27:33.999999'
);

Output

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CREATE TABLE IF NOT EXISTS "public"."runoob_datatype_test"
(
  "datatype_1" TIMESTAMP WITHOUT TIME ZONE,
  "datatype_2" TIMESTAMP(0) WITHOUT TIME ZONE,
  "datatype_3" TIMESTAMP(6) WITHOUT TIME ZONE,
  "datatype_4" TIMESTAMP WITHOUT TIME ZONE DEFAULT NULL,
  "datatype_5" TIMESTAMP WITHOUT TIME ZONE DEFAULT '2018-10-12 15:27:33.999999'
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("datatype_1");

Input: TIME

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CREATE TABLE IF NOT EXISTS `runoob_dataType_test`(
    `dataType_1` TIME DEFAULT '20:58:10',
    `dataType_2` TIME(3) DEFAULT '20:58:10',
    `dataType_3` TIME(6) DEFAULT '20:58:10',
    `dataType_4` TIME(6) DEFAULT '2018-10-11 20:00:00',
    `dataType_5` TIME(6) DEFAULT '20:58:10.01234',
    `dataType_6` TIME(6) DEFAULT '2018-10-11 20:00:00.01234',
    `dataType_7` TIME DEFAULT NULL,
    `dataType_8` TIME(6) DEFAULT NULL,
    PRIMARY KEY (dataType_1)
);

Output

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CREATE TABLE IF NOT EXISTS "public"."runoob_datatype_test"
(
  "datatype_1" TIME WITHOUT TIME ZONE DEFAULT '20:58:10',
  "datatype_2" TIME(3) WITHOUT TIME ZONE DEFAULT '20:58:10',
  "datatype_3" TIME(6) WITHOUT TIME ZONE DEFAULT '20:58:10',
  "datatype_4" TIME(6) WITHOUT TIME ZONE DEFAULT '2018-10-11 20:00:00',
  "datatype_5" TIME(6) WITHOUT TIME ZONE DEFAULT '20:58:10.01234',
  "datatype_6" TIME(6) WITHOUT TIME ZONE DEFAULT '2018-10-11 20:00:00.01234',
  "datatype_7" TIME WITHOUT TIME ZONE DEFAULT NULL,
  "datatype_8" TIME(6) WITHOUT TIME ZONE DEFAULT NULL,
  PRIMARY KEY ("datatype_1")
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("datatype_1");

Input: TIMESTAMP

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CREATE TABLE IF NOT EXISTS `runoob_dataType_test`(
   `dataType_1` TIMESTAMP,
   `dateType_4` TIMESTAMP DEFAULT '2018-10-12 15:27:33',
   `dateType_5` TIMESTAMP DEFAULT '2018-10-12 15:27:33.999999',
   `dateType_6` TIMESTAMP DEFAULT '2018-10-12 15:27:33',
   `dateType_7` TIMESTAMP DEFAULT '2018-10-12 15:27:33',
   `dataType_8` TIMESTAMP(0) DEFAULT '2018-10-12 15:27:33',
   `dateType_9` TIMESTAMP(6) DEFAULT '2018-10-12 15:27:33'
);

Output

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CREATE TABLE IF NOT EXISTS "public"."runoob_datatype_test"
(
  "datatype_1" TIMESTAMP WITH TIME ZONE,
  "datetype_4" TIMESTAMP WITH TIME ZONE DEFAULT '2018-10-12 15:27:33',
  "datetype_5" TIMESTAMP WITH TIME ZONE DEFAULT '2018-10-12 15:27:33.999999',
  "datetype_6" TIMESTAMP WITH TIME ZONE DEFAULT '2018-10-12 15:27:33',
  "datetype_7" TIMESTAMP WITH TIME ZONE DEFAULT '2018-10-12 15:27:33',
  "datatype_8" TIMESTAMP(0) WITH TIME ZONE DEFAULT '2018-10-12 15:27:33',
  "datetype_9" TIMESTAMP(6) WITH TIME ZONE DEFAULT '2018-10-12 15:27:33'
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("datatype_1");

Input: YEAR

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CREATE TABLE IF NOT EXISTS `runoob_dataType_test`(
    `dataType_1` YEAR,
    `dataType_2` YEAR(4),
    `dataType_3` YEAR DEFAULT '2018',
    `dataType_4` TIME DEFAULT NULL
);

Output

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CREATE TABLE IF NOT EXISTS "public"."runoob_datatype_test"
(
  "datatype_1" SMALLINT,
  "datatype_2" SMALLINT,
  "datatype_3" VARCHAR(4) DEFAULT '2018',
  "datatype_4" TIME WITHOUT TIME ZONE DEFAULT NULL 
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("datatype_1");
Parent topic: Data Types