云数据库 GaussDB-使用:示例

时间：2023-11-01 16:22:49

云数据库 GaussDB

示例

-- 准备数据CREATE TABLE t1(c1 int, c2 int);INSERT INTO t1 VALUES(1, 1);INSERT INTO t1 VALUES(2, 2);-- 创建增量物化视图openGauss=# CREATE INCREMENTAL MATERIALIZED VIEW mv AS SELECT * FROM t1;CREATE MATERIALIZED VIEW-- 插入数据openGauss=# INSERT INTO t1 VALUES(3, 3);INSERT 0 1-- 增量刷新物化视图openGauss=# REFRESH INCREMENTAL MATERIALIZED VIEW mv;REFRESH MATERIALIZED VIEW-- 查询物化视图结果openGauss=# SELECT * FROM mv; c1 | c2 ----+----  1 |  1  2 |  2  3 |  3(3 rows)-- 插入数据openGauss=# INSERT INTO t1 VALUES(4, 4);INSERT 0 1-- 全量刷新物化视图openGauss=# REFRESH MATERIALIZED VIEW mv;REFRESH MATERIALIZED VIEW-- 查询物化视图结果openGauss=# select * from mv; c1 | c2 ----+----  1 |  1  2 |  2  3 |  3  4 |  4(4 rows)-- 删除物化视图openGauss=# DROP MATERIALIZED VIEW mv;DROP MATERIALIZED VIEW

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