dbms_mview refresh return code

For example, the following statement deletes rows from the materialized view log that has dependency rows in the least recently refreshed materialized view: DBMS_MVIEW.PURGE_LOG('master_table',1,'delete'); This procedure is called on the master site or master materialized view site to delete the rows in materialized view refresh related data dictionary tables maintained at the master for the specified materialized view identified by mview_id or the combination of mviewowner, mviewname, and mviewsite. So I normally do not use refresh group. SQL> exec dbms_mview.refresh('MY_MV',atomic_refresh=>TRUE); If you do not specify an atomic refresh (by setting "atomic refresh = FALSE" in dbms_mview.refresh_all_mviews) then you can optimize the materialized view refresh with these mechanisms: - Parallel DML - Truncate DDL DBMS_SNAPSHOT is a synonym for DBMS_MVIEW. It is used for Partition Change Tracking (PCT). Executing this procedure based on the materialized view identification is useful if the target materialized view is not listed in the list of registered materialized views (DBA_REGISTERED_MVIEWS). When invoked manually, the value of mview_id must be looked up in the materialized view data dictionary views by the person who calls the procedure. If you do not specify a mview_id, enter the name of the target materialized view using the mviewname parameter. Table 100-9 PURGE_MVIEW_FROM_LOG Procedure Parameters. 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. A return value of false indicates that these triggers are enabled. You can obtain the output from DBMS_MVIEW.EXPLAIN_REWRITE in two ways. The script is found in the ADMIN directory. Name of the materialized view site for a materialized view registering at an Oracle database version 8.x and higher master site or master materialized view site. Comma-delimited list of master tables or master materialized views on which materialized views can depend. This parameter can override the setting for the parameter num. This procedure is invoked at the master site or master materialized view site by a remote materialized view site using a remote procedure call. Use this parameter to direct EXPLAIN_REWRITE's output to a PL/SQL VARRAY. If true, then perform nested refresh operations for the specified set of materialized views. Set purge to aggressive to trim the queue if multiple master replication groups are pushed to different target sites, and updates to one or more replication groups are infrequent and infrequently pushed. If you want to direct the output of EXPLAIN_REWRITE to a VARRAY instead of a table, you should call the procedure as follows: Note that if the query is less than 256 characters long, EXPLAIN_REWRITE can be easily invoked with the EXECUTE command from SQL*Plus. This procedure does not unregister the materialized view. These restrictions also apply when passing the defining query of a materialized view to the EXPLAIN_MVIEW procedure. Alternatively, you can specify the SELECT string or CREATE MATERIALIZED VIEW statement for a potential materialized view. If this parameter is true and atomic_refresh is false, this procedure continues to refresh other materialized views if it fails while refreshing a materialized view. Nested refresh operations refresh all the depending materialized views of the specified set of tables based on a dependency order to ensure the nested materialized views are truly fresh with respect to the underlying base tables. Alternatively, you may pass in a PL/SQL index-by table of type DBMS_UTILITY.UNCL_ARRAY, where each element is the name of a table. In case of an error, this procedure can be invoked again until all the materialized view logs are purged. This procedure enables you to learn why a query failed to rewrite, or, if it rewrites, which materialized views will be used. I want to refresh a Materialized view with a a java code. This procedure enables you to learn why a query failed to rewrite, or, if it rewrites, which materialized views will be used. For example, if a primary key materialized view can be fast refreshed, you can enter the following for this parameter: DBMS_MVIEW.REG_PRIMARY_KEY_MVIEW + DBMS_MVIEW.REG_FAST_REFRESHABLE_MVIEW. If a query exceeds the maximum VARCHAR2 size, then qry_txt contains the first 32000 characters of the query and the remainder is truncated. Note: Do not set this parameter unless directed to do so by Oracle Support Services. If true, then perform nested refresh operations for the specified set of materialized views. The first is to use a table, while the second is to create a VARRAY. I need to understand what this code is doing execute DBMS_MVIEW.REFRESH('briir. Otherwise, these changes may appear to be temporarily lost. Return Type. For multiple materialized views, you can provide a comma-delimited list of names. To improve performance of a Complete Refresh, the optional parameter atomic_refresh of the procedure dbms_mview.refresh is very useful. For example, the following EXECUTE statement within SQL*Plus: performs a complete refresh of the materialized views that depend on the employees table, a fast refresh of the materialized views that depend on the departments table, and a default refresh of the materialized views that depend on the hr.regions table. This procedure does not unregister the materialized view. If this parameter is set to true, then the refreshed materialized views are refreshed in a single transaction. BEGIN DBMS_MVIEW.REFRESH('QA_ADMIN.MY_REVIEW_TAB','C'); END; Refresh Error: A return value of false indicates that these triggers are enabled. These materialized views can be located in different schemas and have different master tables or master materialized views. If a table does not have a corresponding refresh method (that is, if more tables are specified than refresh methods), then any materialized view that depends on that table is refreshed according to its default refresh method. If this parameter is set to true, then the list of materialized views is refreshed in a single transaction. Description. It is used for Partition Change Tracking (PCT). Table 100-6 EXPLAIN_REWRITE Procedure Parameters. (Synonyms are not supported.) This chapter contains the following topics: This section contains topics which relate to using the DBMS_MVIEW package. Query the DBA_BASE_TABLE_MVIEWS view at the materialized view log site for a listing of materialized view IDs. If the refresh fails for any of the materialized views, none of the materialized views are updated. The first is to use a table, while the second is to create a VARRAY. If REGISTER_MVIEW is called multiple times with the same mviewowner, mviewname, and mviewsite, then the most recent values for mview_id, flag, and qry_txt are stored. The PL/SQL varray that receives the output. When invoked manually, the value of mview_id must be looked up in the materialized view data dictionary views by the person who calls the procedure. However, all of the tables and materialized views must be in your local database. FUNCTION get_security_predicate(obj_schema VARCHAR2, obj_name VARCHAR2) RETURN VARCHAR2 is d_predicate VARCHAR2(2000); is_refresh boolean := true; cursor c1 is select s_rls_filter.COLUMN_NAME || ' ' || s_rls_filter.OPERATOR || ' ' || s_rls_filter.VALUE || s_rls_filter.wherecls pred from s_group_function,s_function,s_session, s_group_user,s_rls_filter where … If a materialized view does not have a corresponding refresh method (that is, if more materialized views are specified than refresh methods), then that materialized view is refreshed according to its default refresh method. You simply call DBMS_MVIEW.EXPLAIN_MVIEW, passing in as parameters the schema and materialized view name for an existing materialized view. A constant that describes the properties of the materialized view being registered. This procedure enables the administration of individual materialized views. Specify an Oracle database version 7 materialized view registering at an Oracle database version 8.x and higher master sites or master materialized view sites as a DATE. (Synonyms are not supported.) This procedure usually is used in environments using Oracle's data warehousing technology. Valid constants that can be assigned include the following: DBMS_MVIEW.REG_V7_SNAPSHOT if the materialized view is at an Oracle database version 7 site, reg_repapi_snapshot if the materialized view is at an Oracle database version 8.x or higher site, DBMS_MVIEW.REG_UNKNOWN (the default) if you do not know whether the materialized view is at an Oracle database version 7 site or an Oracle database version 8.x (or higher) site. These tables and the materialized views that depend on them can be located in different schemas. Set this parameter to true if you want to push changes from the materialized view to its associated master tables or master materialized views before refreshing the materialized view. You should only run this procedure to manually register a materialized view if the automatic registration failed or if the registration information was deleted. Name of the materialized view site rollback segment to use while refreshing materialized views. dbms_mview is a synonym for dbms_snapshot which is the name of the actual package. These materialized views can be located in different schemas and have different master tables or master materialized views. Create the MV with the clause "REFRESH COMPLETE ON DEMAND" You don't define a refresh time when creating the MV. The query specified in the EXPLAIN_REWRITE statement is never actually executed. Alternatively, you may pass in a PL/SQL index-by table of type DBMS_UTILITY.UNCL_ARRAY, where each element is the name of a table. Table 100-8 PURGE_LOG Procedure Parameters. This procedure enables the administration of individual materialized views. However, all of the tables and materialized views must be in your local database. --Refresh group is a Group of Mviews. _____ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Stefan Knecht Sent: Sunday, April 30, 2006 11:00 PM To: oracle-l@xxxxxxxxxxxxx Subject: Re: Refresh materialized view by other user then owner From what I can see from your posting: begin DBMS_MVIEW.REFRESH('sys.My_View','c'); end; You're creating the materialized view in schema … Using the results from the procedure, you can take the appropriate action needed to make a query rewrite if at all possible. This procedure refreshes a list of materialized views. Valid constants that can be assigned include the following: DBMS_MVIEW.REG_V7_SNAPSHOT if the materialized view is at an Oracle database version 7 site, DBMS_MVIEW.REG_V8_SNAPSHOT if the materialized view is at an Oracle database version 8.x or higher site, DBMS_MVIEW.REG_UNKNOWN (the default) if you do not know whether the materialized view is at an Oracle database version 7 site or an Oracle database version 8.x (or higher) site. this group can contain 1 or More Mviews and all the Mvies in one refresh group can be refershed using 'DBMS_REFRESH.REFRESH ('apps.TEST_TABLE_JK_MV'); ' -- we can Query the Referesh group details using below select statement it will return the record with the regersh group name 'TEST_TABLE_JK' If the refresh fails for any of the materialized views, none of the materialized views are updated. If this parameter is true, an updatable materialized view continues to refresh even if there are outstanding conflicts logged in the DEFERROR view for the materialized view's master table or master materialized view. With solutions for Toad for Oracle, Toad for MySQL, Toad for SQL Server, DB2, SAP and more. The materialized view or potential materialized view is then analyzed and the results are written into either a table called MV_CAPABILITIES_TABLE, which is the default, or to an array called MSG_ARRAY. The default is false. Query the DBA_REGISTERED_MVIEWS view at the materialized view log site to view the materialized view sites. You can also use EXPLAIN_REWRITE with multiple materialized views, in which case the syntax will be the same as with a single materialized view, except that the materialized views are specified by a comma-delimited string. This function returns a partition marker from a rowid. For example, consider the following EXECUTE statement within SQL*Plus: DBMS_MVIEW.REFRESH ('countries_mv,regions_mv,hr.employees_mv','cf'); This statement performs a complete refresh of the countries_mv materialized view, a fast refresh of the regions_mv materialized view, and a default refresh of the hr.employees materialized view. P or p refreshes by recomputing the rows in the materialized view affected by changed partitions in the detail tables. For example, you can determine if a materialized view is fast refreshable and what types of query rewrite you can perform with a particular materialized view. The second version is for explaining an existing or potential materialized view with output to a VARRAY. indicates force refresh, C or c indicates complete refresh, and A or a indicates always refresh. When a master table is modified, the related materialized view becomes stale and a refresh is necessary to have the materialized view up to date. We're not taking comments currently, so please try again later if you want to add a comment. This script creates a table named REWRITE_TABLE in the current schema. If this parameter is set to false, then each of the materialized views is refreshed non-atomically in separate transactions. Someone might have deleted the PK after the M-View was created or it will let you create but not let you refresh it. A and C are equivalent. Syntax DBMS_MVIEW.I_AM_A_REFRESH RETURN BOOLEAN; Return Values. The EXPLAIN_REWRITE procedure cannot accept queries longer than 32627 characters. Otherwise, these changes may appear to be temporarily lost. Umm, I'm pretty sure that dbms_mview.refresh () is a procedure rather than a function - so there is no return value from it. This procedure refreshes all materialized views that have the following properties: This procedure is intended for use with data warehouses. You can determine the properties of a materialized view by querying the ALL_MVIEWS data dictionary view. There are two ways to get the output from DBMS_MVIEW.EXPLAIN_MVIEW, via a table or via a varray. A and C are equivalent. The following shows the basic syntax for using an output table: If you want to direct the output of EXPLAIN_REWRITE to a VARRAY, instead of a table, then the procedure should be called as follows: The fully qualified name of an existing materialized view in the form of SCHEMA.MV. If this parameter is set to true, then the refreshed materialized views are refreshed in a single transaction. A string of refresh methods indicating how to refresh the listed materialized views. Table 100-12 REFRESH_DEPENDENT Procedure Parameters. For example, if a primary key materialized view can be fast refreshed, you can enter the following for this parameter: DBMS_MVIEW.REG_PRIMARY_KEY_MVIEW + DBMS_MVIEW.REG_FAST_REFRESHABLE_MVIEW. In this case, use the plus sign (+) to specify more than one property. P or p refreshes by recomputing the rows in the materialized view affected by changed partitions in the detail tables. Returns the number of failures that occurred during processing. The first 32,000 bytes of the materialized view definition query. It is invoked at a master site or master materialized view site to register a materialized view. Alternatively, you can specify the SELECT string or CREATE MATERIALIZED VIEW statement for a potential materialized view. REFRESH (list IN VARCHAR2, method IN VARCHAR2 DEFAULT NULL, rollback_seg IN VARCHAR2 DEFAULT NULL, push_deferred_rpc IN BOOLEAN DEFAULT TRUE, refresh_after_errors IN BOOLEAN DEFAULT FALSE, purge_option IN NUMBER DEFAULT 1, parallelism IN NUMBER DEFAULT 0, heap_size IN NUMBER DEFAULT 0, atomic_refresh IN BOOLEAN DEFAULT TRUE, nested IN BOOLEAN DEFAULT … Table 100-2 BEGIN_TABLE_REORGANIZATION Procedure Parameters. All of the refreshed materialized views are updated to a single point in time. or a SELECT statement or a CREATE MATERIALIZED VIEW statement for a potential materialized view. Using this procedure is straightforward. We have to manually add the materialized view back to the refresh group. A client-supplied unique identifier to associate output rows with specific invocations of EXPLAIN_MVIEW. "AUD_PARTS_MVIEW"','F'); PL/SQL procedure successfully completed. DBMS_MVIEW enables you to understand capabilities for materialized views and potential materialized views, including their rewrite availability.

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