For more information about the PostgresREFRESH MATERIALIZED VIEWcommand, see thePostgreSQL core documentation. Examples This statement creates a materialized view nameddept_30: CREATEMATERIALIZEDVIEWdept_30 BUILD IMMEDIATEASSELECT*FROMempWHEREdeptno=30; The view contains information r...
ON DEMAND 指示伺服器通過調用 DBMS_MVIEW 包或調用 Postgres REFRESH MATERIALIZED VIEW 語句來按需重新整理具體化檢視。這是預設行為。 樣本 以下語句建立名為 dept_30 的具體化檢視: CREATE MATERIALIZED VIEW dept_30 BUILD IMMEDIATE AS SELECT * FROM emp WHERE deptno = 30; 該視圖包含從 emp 表中檢索的、...
ON demand 用于命令服务器根据要求来刷新物化视图,这时需要调用包dbms_mview或调用Postgres refresh materialized view语句。这是一种缺省行为。 描述 create materialized view定义了一个查询视图。这个查询视图不会因为每次在查询中被引用而更新。通过缺省,在创建视图时,这个视图会自动填充信息。您可以包括关键字build def...
DROP MATERIALIZED VIEW 语法DROP MATERIALIZED VIEW [IF EXISTS] view_name 描述 用于删除现有的物化视图。若删除的视图不存在,且指定了可选参数if exists,则不会抛出错误信息。 删除物化视图将导致删除与指定视图关联的元数据和表数据。 来自:帮助中心 查看更多 → DROP MATERIALIZED VIEW postgres=# DROP MAT...
DROP MATERIALIZED VIEW 语法DROP MATERIALIZED VIEW [IF EXISTS] view_name 描述 用于删除现有的物化视图。若删除的视图不存在,且指定了可选参数if exists,则不会抛出错误信息。 删除物化视图将导致删除与指定视图关联的元数据和表数据。 来自:帮助中心 查看更多 → DROP MATERIALIZED VIEW postgres=# DROP MAT...
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 MATERIALIZED VIEW CREATE MODEL CREATE OPERATOR CREATE OPERATOR CLASS CREATE PACKAGE CREATE PLUGGABLE DATABASE CREATE PROCEDURE CREATE RESOURCE LABEL CREATE RESOURCE POOL CREATE ROLE CREATE ROW LEVEL SECURITY POLICY CREATE RULE CREATE SCHEMA CREATE SECURITY LABEL CREATE SEQUENCE CREATE SERVER CREATE SYN...
经查询,第一个rowid必须设置一个别名,如下: create materialized view t_v as select t1.*,1 as marker,rowid as rid from t1 t1 union all select t2.*,2 as marker,rowid from t2 t2; 问题解决。 注:也有可能会在refresh的时候出现ora-904,可参考:https://oracleblog.org/working-case/ora920-when...
CREATE MATERIALIZED VIEW CREATE MODEL CREATE NODE CREATE NODE GROUP CREATE PACKAGE CREATE PROCEDURE CREATE RESOURCE LABEL CREATE RESOURCE POOL CREATE ROLE CREATE ROW LEVEL SECURITY POLICY CREATE SCHEMA CREATE SECURITY LABEL CREATE SEQUENCE CREATE SERVER CREATE SYNONYM CREATE TABLE CREATE TABLESPACE CREATE TA...
CREATE EXTERNAL SCHEMA [IF NOT EXISTS]local_schema_nameFROM POSTGRES DATABASE 'federated_database_name' [SCHEMA 'schema_name'] URI 'hostname' [ PORTport_number] IAM_ROLE [ default | 'arn:aws:iam::<AWS アカウント-id>:role/<role-name>' ] SECRET_ARN 'ssm-secret-arn' ...