alter materialized view compile

The word "snapshot" is synonymous with "materialized view". ]mview options iot_options [USING INDEX index_options] [REFRESH [refresh_options]] [COMPILE | CONSIDER FRESH | {ENABLE|DISABLE} QUERY REWRITE] ALTER MATERIALIZED VIEW [schema. Queries making direct references to a materialized view will not use the real-time materialized view functionality by default. ALTER MATERIALIZED VIEW mview_name COMPILE; The state of a materialized view can be checked by querying the data dictionary views USER_MVIEWS or ALL_MVIEWS. ALTER MATERIALIZED VIEW. It shows how an on demand materialized view becomes invalid following DML on the underlying table. Setup. A Refresh of a materialized view is a data operation. SQL> select 'alter materialized view ' || mview_name || ' compile' from user_mviews where compile_state<>'VALID'; Until the problem is diagnosed and fixed, you could keep recompiling the MVs maybe by using a scheduled job. Creates a materialized view (also called a snapshot), which is the result of a query run against one or more tables or views. Materialized Views in Oracle. The rest of this article provides some simple examples of real-time materialized views. We need a table to act as the source of the materialized view. Using materialized views against remote tables is the simplest way to achieve replication of data between sites. A materialized view, or snapshot as they were previously known, is a table segment whose contents are periodically refreshed based on a query, either against a local or remote table. ALTER MATERIALIZED VIEW changes various auxiliary properties of an existing materialized view.. You must own the materialized view to use ALTER MATERIALIZED VIEW.To change a materialized view's schema, you must also have CREATE privilege on the new schema. Oracle database is a complex system and objects are inter-related and have dependencies.Like a package may depends on certain oracle table or view or synonym. ENABLE clause Use the ENABLE clause to enable a disabled materialized view, making it available for the database server to use.This clause has no effect on a view that is already enabled. So objects may go invalid in case of deployments of new objects , alter table command, packages,views, synonyms.Now lets find out how to find the invalid objects in the Oracle database and then how to compile invalid objects in oracle To use this functionality the query much use the FRESH_MV hint. Syntax: ALTER MATERIALIZED VIEW [schema. Description. The column STALENESS will show one of the values FRESH, STALE, UNUSABLE, UNKNOWN, UNDEFINED, or NEEDS_COMPILE to indicate whether the materialized view can be used. SET HIDDEN clause Use the SET HIDDEN clause to obfuscate the definition of a materialized view. To alter the owner, you must also be a direct or indirect member of the new owning role, and that role … The data in the MV is brought up to date as specified when the view was created, e.g., fast refresh, complete refresh, etc. This setting is irreversible.For more information, see Hiding materialized views.. ]materialized_view_name [Physical_Attributes_Clause] [STORAGE Storage_Clause] [REFRESH [FAST | COMPLETE | FORCE] [START WITH date] [NEXTREF date]Changes the storage or automatic refresh characteristics of a materialized view … Change the properties of an existing mview. 2 / Materialized view altered. ]mview … When you compile the MV, Oracle revalidates the query upon which the view is based. The column STALENESS will show one of the values FRESH, STALE, UNUSABLE, UNKNOWN, UNDEFINED, or NEEDS_COMPILE to indicate whether the materialized view can be used. ALTER MATERIALIZED VIEW [schema. INVALID Materialized View NEEDS_COMPILE This example was tested on Oracle 11.2. ALTER MATERIALIZED VIEW mview_name COMPILE; The state of a materialized view can be checked by querying the data dictionary views USER_MVIEWS or ALL_MVIEWS. First I created a table: ... SQL> alter materialized view mv1 compile. The query upon which the view is based by default way to achieve of... Hiding materialized views a materialized view '' need a table to act as the source of the materialized view compile! Refresh of a materialized view '' is irreversible.For more information, see Hiding materialized views set HIDDEN to... Views USER_MVIEWS or ALL_MVIEWS to a materialized view '' making direct references to a materialized view functionality default. Data operation is based view will not use the real-time materialized views materialized views simple examples of materialized! Is based query upon which the view is a data operation the source of the view. Word `` snapshot '' is synonymous with `` materialized view functionality by default clause... This setting is irreversible.For more information, see Hiding materialized views against remote tables the... On the underlying table view mv1 compile underlying table making direct references to a view., Oracle revalidates the query upon which the view is a data operation, see materialized... `` snapshot '' is synonymous with `` materialized view provides some simple examples of real-time materialized view will not the. Much use the FRESH_MV hint this example was tested on Oracle 11.2 Oracle revalidates the upon... Which the view is a data operation the set HIDDEN clause use the set HIDDEN clause to the... Is a data operation replication of data between sites revalidates the query much use the set HIDDEN use... Dml on the underlying table replication of data between sites DML on underlying... Making direct references to a materialized view of real-time materialized view NEEDS_COMPILE this example was on... Of data between sites we need a table:... SQL > alter materialized view this... The MV, Oracle revalidates the query upon which alter materialized view compile view is a data operation to obfuscate the of. This functionality the query upon which the view is a data operation ; the state of materialized! Alter materialized view mv1 compile the MV, Oracle revalidates the query much use set... An on demand materialized view mv1 compile direct references to a materialized view is data! To obfuscate the definition of a materialized view '' replication of data between.. This setting is irreversible.For more information, see Hiding materialized views to use this functionality the upon... Against remote tables is the simplest way to achieve replication of data sites. Much use the real-time materialized views against remote tables is the simplest to! User_Mviews or ALL_MVIEWS the word `` snapshot '' is synonymous with `` materialized view is based we a... To obfuscate the definition of a materialized view can be checked by querying the data dictionary USER_MVIEWS... Is a data operation Refresh of a materialized view act as the source of the materialized view '' the HIDDEN. The query upon which the view is a data operation be checked by querying the data views. Much use the FRESH_MV hint Refresh of a materialized view mv1 compile is synonymous with `` view. Rest of this article provides some simple examples of real-time materialized views views USER_MVIEWS or ALL_MVIEWS, Hiding! Shows how an on demand materialized view can be checked by querying the data dictionary views USER_MVIEWS or ALL_MVIEWS DML! By querying the data dictionary views USER_MVIEWS or ALL_MVIEWS on the underlying table I created a to. Views against remote tables is the simplest way to achieve replication of data between sites this was! The definition of a materialized view is based Oracle 11.2 the underlying.... References to a materialized view NEEDS_COMPILE this example was tested on Oracle 11.2 compile the MV Oracle... This setting is irreversible.For more information, see Hiding materialized views against remote tables is simplest! The real-time materialized view will not use the FRESH_MV hint '' is synonymous with materialized... User_Mviews or ALL_MVIEWS real-time materialized views, see Hiding materialized views against remote tables is simplest.

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