Mahaveer Jain In Database Technology since past 14+ years, have worked in Oracle, Cassandra, Postgresql from database designing , plsql programing to DBA activities. ORA-00942 on materialized view refresh. Symptoms . CREATE MATERIALIZED VIEW mv_comp_tab2 refresh fast on demand with rowid … but can't locate the object I'm looking for - only the synonym of the same name. CREATE MATERIALIZED VIEW mv_fast_demand_scheduled_tab1 REFRESH FAST ON DEMAND START WITH SYSDATE NEXT SYSDATE + 1/1440 AS SELECT * FROM tab1@orasoa_link; create materialized view mv_count_tab2 build immediate refresh complete as select count(1) from tab2@orasoa_link . You must have an Materialized View Log on the target table in order to be able to fast refresh a view in Oracle. Hi all, I just took over a db, and there is an expdp done monthly which exclude the following - materialized view - materialized view logs - refresh group This expdp dump is then use to import into test and trial environment. In Source DB it tries to purge the mview log and at destination mview itself. And dropping them was taking a long time, as it tries to drop the data in both source and destination DB. Fast refreshes have the benefit of not taking much time. redesign the system and eliminate those “tough” queries; cache the results of such queries; using materialized views. Re: Export Materialized view: Author: Ales Kavsek, Slovenia: Date: Apr 26, 2010, 16:14, 3885 days ago: Score: Message: Hi, > exp user1/user1 file=exp.dmp log=exp.log tables= tab1 statistics=none No, you can not. The view which we use to make a replica of a target master from a single point in a time is known materialized view. exporting materialized views. 3) Import the table into the other db 4) Rename the table to the old mv name 5) create a materialized view (using the old definition), but tell it to use the table you just brought over. Recently I had to drop a couple of large Materialized View. Mview are local copies of data located remotely, or are used to … Applies to: Oracle Database - Enterprise Edition - Version 11.2.0.3 and later Information in this document applies to any platform. Use the "ON PREBUILT TABLE" clause. First, let's use the oerr command to see details on the ORA-00942 error: ORA-00942 table or view does not exist Cause: The table or view entered does not exist, a synonym that is not allowed here was used, or a view was referenced where a table is required. In order to disable that you must break the dbms_job that was created in order to refresh the view. After the import, the previous dba will run manual script to recreate the mviews, mview logs … A materialized view created with the automatic refresh can not be alter to stop refreshing. EXPDP - ORA-39127 And ORA-00904 ("TRANS_NAME": Invalid Identifier) On MATERIALIZED_VIEW_LOG (Doc ID 1571598.1) Last updated on APRIL 03, 2020. Long time Oracle developer, first time poking with imp - I'm trying to find the definition on a materialized view from the dmp file, using windows. As we know why do we need materialized view in Oracle? I'm trying to do an Oracle Data Pump Export (expdp). exporting snapshot logs. exporting refresh groups and children. I want to export the definition and data for most of the schema, but exclude the rows for some of the larger tables. I see the following messages in the expdp log : "FLASHBACK automatically enabled to preserve database integrity." 1) Create a table based on the materialized view create table new_ as select * from ; 2) Export the table. exporting job queues. Complete Refresh - A complete refresh will cause the entire Materialized View to be truncated … I've used: imp userid=dev/pwd file=C:\OraExports\DEV.dmp show=Y fromuser=devmgr touser=devmgr 2> c:\scott_all.txt. With classic exp you can export materialized views with either owner=<> or full=y. 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