创建普通视图 CREATEVIEWteacher_VasSELECTid,b.tnamefromteacher aJOINstudent bONa.id=b.teacher_id; 创建物化视图 CREATEMATERIALIZEDVIEWteacher_MasSELECTid,b.tnamefromteacher aJOINstudent bONa.id=b.teacher_id; 区别分析 01,插入数据 INSERTintostudentVALUES(10001,2,'lipeng'); 02,普通视图查看 SELECT*f...
postgres=# CREATE OR REPLACE FUNCTION tri_foo_func() RETURNS TRIGGER AS $$ BEGIN REFRESH MATERIALIZED VIEW mvfoo; RETURN NULL; END; $$ LANGUAGE plpgsql; 由于我们将要创建的是一个AFTER触发器, 所以函数返回NULL即可 创建AFTER触发器自身 CREATE TRIGGER tri_foo AFTER INSERT OR UPDATE OR DELETE ON f...
用Materialized View是一个不错的选择。 CREATEMATERIALIZEDVIEWsearch_indexASSELECTpost.id, post.title, setweight(to_tsvector(post.language::regconfig, post.title),'A')||setweight(to_tsvector(post.language::regconfig, post.content),'B')||setweight(to_tsvector('simple', author.name),'C')||s...
AI检测代码解析 CREATE MATERIALIZED VIEW errors_history_mv TO errors_history AS SELECT * FROM events WHERE event = 'error' 1. 2. 现在当在events表中插入数据时,error事件会自动插入至errors_history表。另外,当ttl过程从events表中删除记录时,数据已经保留至errors_history表。 使用聚集压缩历史数据 有时并...
Avoid the need to grant superuser privileges by using the pg_maintain role for VACUUM, ANALYZE, CLUSTER, REFRESH MATERIALIZED VIEW, REINDEX, and LOCK TABLE; alternatively, MAINTAIN privilege can be granted to users on a table Make TLS connections without a network round trip negotiation ALTER SYS...
CREATE MATERIALIZED VIEW Y N N CREATE OPERATOR Y Y DDL CREATE OPERATOR CLASS Y Y DDL CREATE OPERATOR FAMILY Y Y DDL CREATE PACKAGE Y Y DDL CREATE PACKAGE BODY Y Y DDL CREATE POLICY Y Y DML CREATE PROCEDURE Y Y DDL CREATE PROFILE Y Y Details CREATE PUBLICATION Y Y DDL CREATE QUEUE Y...
5mins of Postgres E16: Incremental Materialized Views with pg_ivm and Looking Ahead to Postgres 15 Beta 105 May, 2022 Today, we're going to talk about incremental view maintenance, as well as the upcoming Postgres 15 beta release. Share this episode: Click here to share this episode on tw...
refresh materialized view mv_t1 1. 2. 3. 4. 四、应用场景 4.1、数据同步 本地创建外部表;可对外部表支持执行delete、update、insert语句;同时远程数据库的表也会执行相对应的操作。例如两个数据库实现token的一致。 4.2、数据迁移 在导入外部表;可以实现数据迁移。
使用外部表(FOREIGNTABLE)或物化视图(MATERIALIZEDVIEW)时,字段顺序需要与数据源完全对应。涉及到JSONB字段时,虽然其存储方式特殊,但将其放在表末尾有利于扩展新属性。 监控优化方面推荐定期使用pg_stat_all_tables分析表膨胀情况,结合pgstattuple扩展检测具体数据页填充率。对于关键业务表,每季度生成字段顺序评估报告,重点...
(name) ON test_table TO test_user1; GRANT postgres=# \dp+ test_table *** QUERY *** SELECT n.nspname as "Schema", c.relname as "Name", CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'm' THEN 'materialized view' WHEN 'S' THEN 'sequence' WHEN 'f'...