创建一个视图 CREATEORREPLACEVIEWstudent_view ASSELECT*FROMstudentLEFTJOINteacherONstudent.teacher_id=teacher.id; 创建一个物化视图 CREATEMATERIALIZEDVIEWstudent_view_m ASSELECT*FROMstudentLEFTJOINteacherONstudent.teacher_
创建一个视图 CREATEORREPLACEVIEWstudent_viewASSELECT*FROMstudentLEFTJOINteacherONstudent.teacher_id=teacher.id; 创建一个物化视图 CREATEMATERIALIZEDVIEWstudent_view_mASSELECT*FROMstudentLEFTJOINteacherONstudent.teacher_id=teacher.id; 进行查询explain: master=>explainselect*fromstudent_view; QUERY PLAN---Hash...
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...
创建一个视图 CREATE OR REPLACE VIEW student_view AS SELECT * FROM student LEFT JOIN teacher ON student.teacher_id = ; 1. 2. 3. 4. 5. 创建一个物化视图 CREATE MATERIALIZED VIEW student_view_m AS SELECT * FROM student LEFT JOIN teacher ON student.teacher_id = ; 1. 2. 3. 4. 5. ...
CREATEMATERIALIZEDVIEW<name>[<build_clause>][<create_mv_refresh>]ASsubqueryWhere<build_clause>is: BUILD {IMMEDIATE|DEFERRED}Where<create_mv_refresh>is: REFRESH[COMPLETE][ONDEMAND] Description CREATE MATERIALIZED VIEWdefines a view of a query that isn't updated each time th...
CREATE [ OR REPLACE ] VIEW <name> [ ( <column_name> [, ...] ) ] AS <query> Description CREATE VIEW defines a view of a query. The view isn't physically materialized. Instead, the query runs every time a query references the view. CREATE OR REPLACE VIEW is similar. H...
Create the Postgres publication. You should include all tables you want to replicate as part of the publication: CREATE PUBLICATION airbyte_publication FOR TABLE <tbl1, tbl2, tbl3>;` The publication name is customizable. Refer to the Postgres docs if you need to add or remove tables from yo...
postgres=# \dg+ *** QUERY *** SELECT r.rolname, r.rolsuper, r.rolinherit, r.rolcreaterole, r.rolcreatedb, r.rolcanlogin, r.rolconnlimit, r.rolvaliduntil, ARRAY(SELECT b.rolname FROM pg_catalog.pg_auth_members m JOIN pg_catalog.pg_roles b ON (m.roleid = b.oid) WHERE m....
create viewis currently used. My Environment Relevant Database Driver(s) Agree, can't see any reason not to useCREATE OR REPLACEoverCREATE. Currently the fact that views (as far as I can tell) are only changed using create or drop statements can cause migrations to fail and require manuall...
In episode 52 of 5mins of Postgres, we talk about the createrole_self_grant option in Postgres 16, which lets us create a role that can administer the database but not break out of it. We also talk about the pg_use_reserved_connections role. All in all, Postgres 16 and above will ...