Help Center/ GaussDB(DWS)/ Tool Guide/ DSC/ MySQL Syntax Migrating/ Table (Optional Parameters and Operations)/ STATS_SAMPLE_PAGES
Updated on 2024-07-19 GMT+08:00
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STATS_SAMPLE_PAGES

STATS_SAMPLE_PAGES specifies the number of index pages to sample when cardinality and other statistics for an indexed column are estimated. DSC will delete this attribute during migration.

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,
    PRIMARY KEY(`dataType1`)
) ENGINE=InnoDB,STATS_SAMPLE_PAGES=25;

ALTER TABLE runoob_alter_test STATS_SAMPLE_PAGES 100;
ALTER TABLE runoob_alter_test STATS_SAMPLE_PAGES=100;

Output

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