Materialized View - Oracle / Data is not updating

问题:

My friend has created a materialized view but the View does not receive new data from Mater Table. The view is receiving data only in creation, after it the news data are not included.

Anyone can help me to resolve this issue?

Fallow below my materialized view.

    CREATE or REPLACE MATERIALIZED VIEW DATABASE.MyMatView
    LOGGING
    TABLESPACE SDBANCO
    PCTFREE 10
    INITRANS 2
    STORAGE
    (
        INITIAL 65536
        NEXT 1048576
        MINEXTENTS 1
        MAXEXTENTS UNLIMITED
        BUFFER_POOL DEFAULT
    )
    NOCOMPRESS
    NOCACHE
    NOPARALLEL
    REFRESH ON DEMAND
    FORCE
    DISABLE QUERY REWRITE
AS
    SELECT * FROM .....

Thanks,

Matheus Lozano

回答1:

If you want the materialized view to be refreshed automatically you should use ON COMMIT refresh method. Since you have specified an ON DEMAND refresh you will have to manually refresh the materialized view using DBMS_MVIEW.REFRESH method.

There are lot of considerations for refreshing a materialized view. I would recommend that you read the following Oracle documentation.

https://docs.oracle.com/database/121/DWHSG/refresh.htm#DWHSG8360

回答2:

Assuming you did this but... just to be sure... you did issue the command to refresh the mview, right? You don't expect it to refresh by itself, when you have the option REFRESH ON DEMAND right there in the view definition, right?