Help Center> Data Warehouse Service (DWS)> Tool Guide> DSC> SQL Syntax Migration Reference> MySQL Syntax Migrating> Schema Objects and Data Definition Language (DDL)> Table (Optional Parameters and Operations)> BLOCK_SIZE
Updated on 2024-04-28 GMT+08:00
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BLOCK_SIZE

In ADB, this parameter specifies the number of values stored in each block in columnar storage, which is also the minimum I/O unit. GaussDB(DWS does not support table definition modification using this attribute. DSC will delete the keyword during migration.

Input

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DROP TABLE IF EXISTS exists unsupport_parse_test;
CREATE TABLE `unsupport_parse_test` (
    `username` int,
    `update` timestamp not null default current_timestamp on update current_timestamp ,
     clustered key clustered_key(shopid ASC, datetype ASC)
)BLOCK_SIZE = 1024 index_ALL = 'y';
DROP TABLE IF EXISTS unsupport_parse_test;

Output

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DROP TABLE IF EXISTS "public"."unsupport_parse_test";
CREATE TABLE "public"."unsupport_parse_test" (
  "username" INTEGER,
  "update" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP
) WITH (ORIENTATION = ROW, COMPRESSION = NO) NOCOMPRESS DISTRIBUTE BY HASH ("username");
DROP TABLE IF EXISTS "public"."unsupport_parse_test";