materialized-views

I have a PostgreSQL DB, where I use materialized views. The problem occurs when I try to refresh these materialized views. REFRESH MATERIALIZED VIEW product_cat_mview; REFRESH MATERIALIZED VIEW productsforproject; My solution is, when the user want to see updated data, he should click a "refresh button" on the web page, but this takes about 50s (on a local connection and about 2 minutes from the application server) and all this time the user has to wait, which is not good. Now I should create a solution to automatically refresh these materialized views every 10 minutes. I have created a Java

I am creating multiple views in my code and each time the code is run, I would like to drop all the materialized views generated thus far. Is there any command that will list all the materialized views for Postgres or drop all of them? Show all: SELECT oid::regclass::text FROM pg_class WHERE relkind = 'm'; Names are automatically double-quoted and schema-qualified where needed according to your current search_path in the cast from regclass to text . In the system catalog pg_class materialized views are tagged with relkind = 'm' . The manual: m = materialized view To drop all, you can generate

I kind of understand materialized views and have worked with them before. Recently a question came up as to why a particular report didn't show latest data, I looked into the issue. Apparently, they had a temp table loaded with crontab earlier and switched to Materialized view later. When I looked into the database with the below query (name of the table changed): SELECT * FROM all_objects WHERE object_name = 'TEMP_DATA'; This actually showed 2 objects in the same schema: one table and another materialized view OWNER OBJECT_NAME OBJECT_TYPE DATA_OBJECT_ID LAST_DDL_TIME TIMESTAMP SCHEMA TEMP

Iam trying to refresh the materialized view by using: DBMS_MVIEW.REFRESH('v_materialized_foo_tbl') But it's throwing invalid sql statement. Then I have created a stored procedure like this: CREATE OR REPLACE PROCEDURE MAT_VIEW_FOO_TBL IS BEGIN DBMS_MVIEW.REFRESH('v_materialized_foo_tbl') END MAT_VIEW_FOO_TBL IS; This procedure has been created successfully but when i am calling this procedure with MAT_VIEW_FOO_TBL; it's throwing an error again. Kindly suggest a solution for this issue. Thanks, Srinivas fahim ashraf try this: DBMS_SNAPSHOT.REFRESH( 'v_materialized_foo_tbl','f'); first parameter

as the title i am talking about, what's the best way to track data changes in oracle? i just want to know which row being updated/deleted/inserted? at first i think about the trigger, but i need to write more triggers on each table and then record down the rowid which effected into my change table, it's not good, then i search in Google, learn new concepts about materialized view log and change data capture, materialized view log is good for me that i can compare it to original table then i can get the different records， even the different of the fields, i think the way is the same with i

In one of our applications, we have a massive Materialized View that refreshes three times a day, and takes seven hours to refresh. (Not ideal, I know). This perplexed me, because I surely thought that users and sessions could not access this materialized view while it was being refreshed, but apparently they can!. (The type of refresh is a complete refresh) During a complete refresh, to my understanding, the existing dataset is dropped and the query is then re-executed. If this is true, then how are users/other sessions able to access the materialized view while the materialized view is being

I'll need to invoke REFRESH MATERIALIZED VIEW on each change to the tables involved, right? I'm surprised to not find much discussion of this on the web. How should I go about doing this? I think the top half of the answer here is what I'm looking for: https://stackoverflow.com/a/23963969/168143 Are there any dangers to this? If updating the view fails, will the transaction on the invoking update, insert, etc. be rolled back? (this is what I want... I think) MatheusOl I'll need to invoke REFRESH MATERIALIZED VIEW on each change to the tables involved, right? Yes, PostgreSQL by itself will