更新时间:2024-06-29 GMT+08:00
COLUMN STORE
表的存储方式可使用CREATE TABLE语句中的WITH(ORIENTATION=COLUMN)从ROW-STORE转换为COLUMN存储。可使用rowstoreToColumnstore参数启用/禁用此功能。
输入:CREATE TABLE,修改存储模式为 COLUMN STORE
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CREATE MULTISET VOLATILE TABLE tab1 ( c1 VARCHAR(30) CHARACTER SET UNICODE , c2 DATE , ... ) PRIMARY INDEX (c1, c2) ON COMMIT PRESERVE ROWS; |
输出:
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CREATE LOCAL TEMPORARY TABLE tab1 ( c1 VARCHAR(30) , c2 DATE , ... ) WITH (ORIENTATION = COLUMN) ON COMMIT PRESERVE ROWS DISTRIBUTE BY HASH (c1, c2); |
父主题: 表迁移