how to get materialized view log ddl in oracle

Specify EDITION edition to search edition. Removes a materialized view (or snapshot) from the database. Oracle Database uses default storage properties for mv1. Oracle enterprise edition supports creating materialized views for automatic query re-write. Materialized View Logs. It specifies as filter columns all of the columns of the table referenced in that materialized view. To be eligible for synchronous refresh, the master table must satisfy the following criteria: If the master table is a fact table, then it must be partitioned. The following restrictions apply to COMMIT SCN: Use of COMMIT SCN on a table with one or more LOB columns is not supported and causes ORA-32421. To learn more, see our tips on writing great answers. dbms_metadata.get_dependent_ddl ('materialized_view_log', and Specify ON STATEMENT to indicate that an automatic refresh is to occur every time a DML operation is performed on any of the materialized view's base tables. You can use this clause to avoid the overhead of recording new values. Restrictions on the Defining Query of a Materialized View. It is used to be able to monitor refresh performance of Materialized Views. Rowid materialized views must be based on a single table and cannot contain any of the following: The WITH ROWID clause has no effect if there are multiple master tables in the defining query. undef v_sql This is the default. Oracle strongly recommends that you ensure that this assumption is true in order to ensure that the materialized view correctly reflects the data in its master tables. documentation was created as a support and Oracle training reference for use by our materialized_view_name. Remote DBA Services select If you request a complete refresh, then Oracle Database performs a complete refresh even if a fast refresh is possible. into v_mview_log_sql Wanted! I have an application which is getting data from Oracle(11.2.0.4) Materialized view, there is expected behaviour about materialized view will go INVALID when any DML action happens on the associated tables or assocaited objects are invalid. logging_clause for a full description of this clause. is the registered trademark of Oracle Corporation. select dbms_metadata.get_ddl ('TABLE', 'OFFER_CLASS','MEHMETSALIH') from dual; You . Oracle recommends that you qualify each table and view in the FROM clause of the defining query of the materialized view with the schema containing it. Restriction on the physical_properties_clause. Support, SQL TuningSecurityOracle To create a materialized view that is based on an existing table, use the ON PREBUILT TABLE clause. Use this clause to specify the edition that is searched during name resolution of the editioned objectthe evaluation edition. This is the default. This clause may increase the time taken to complete the commit, because the database performs the refresh operation as part of the commit process. Oracle Database 19c. Specify WITH ROWID to create a rowid materialized view. In the Oracle database server use, another user (called MIMIC2DEVEL) created a materialized view and made it public. NOCACHE specifies that the blocks are placed at the least recently used end of the LRU list. In this example, a materialized view has been created which contains aggregates on a single table. Involved in creating various utility scripts to generate log files in UNIX using shell scripts. Wait until it finishes successfully. See also, Data sources and drivers dialog. However, if this information is invalid, then the refresh procedure may corrupt the materialized view even though it returns a success status. referenced_owner Specify WITH REDUCED PRECISION to authorize the loss of precision that will result if the precision of the table or materialized view columns do not exactly match the precision returned by subquery. Specify NEVER REFRESH to prevent the materialized view from being refreshed with any Oracle Database refresh mechanism or packaged procedure. Oracle Database can use this materialized view log to perform fast refreshes for all fast-refreshable materialized views based on the master table. This reference uses "master tables" for consistency. ORA-23413: table "APPS"."BIV_ACT_SUM_MV" does not have a materialized view log Note: The above MVIEW LOG is not available in one of the environments, but the MVIEW "BIV_ACT_H_SUM_MV" does exist. To learn more, see our tips on writing great answers. Database Support In either case, the owner of the materialized view log must have sufficient quota in the tablespace intended to hold the materialized view log or must have the UNLIMITED TABLESPACE system privilege. DROP MATERIALIZED VIEW [ schema .] The following DDL statements are executed on the target database only. You cannot specify ORGANIZATION EXTERNAL for a materialized view. The following statement creates a staging log on the sh.sales fact table. referenced_name, I want to get a list of materialized view logs in Oracle. Anyone Materialized view logs are used for two types of materialized view refreshes: fast refresh and synchronous refresh. This clause is not supported for materialized views with remote tables. dbms_metadata for extracting the materialized view source code? Use the sharing clause if you want to create the object in an application root in the context of an application maintenance. Commit SCN-based materialized view logs use commit SCN data rather than timestamps, which removes the need for the setup operations and thus can improve the speed of the materialized view refresh. If you also specify the unusable_editions_clause, then the materialized view is not enabled for query rewrite in the unusable editions. To create a materialized view in your own schema: You must have been granted the CREATE MATERIALIZED VIEW system privilege and either the CREATE TABLE or CREATE ANY TABLE system privilege. Partitioning of materialized view logs is the same as partitioning of tables. For both conventional DML changes and for direct-path INSERT operations, other conditions may restrict the eligibility of a materialized view for fast refresh. Because the materialized view conforms to the conditions for fast refresh, the database will perform a fast refresh. To change the default collation for a materialized view, you must recreate the materialized view. Oracle The object_type_col_properties are not relevant for a materialized view. Use this clause to specify the default collation for the materialized view. Corresponding elements in data sources. varchar2 (30) := upper ('&&enter_mview_name'); Can I ask for a refund or credit next year? Includes internally generated statements like default federator call-backs. You cannot specify the PCTUSED parameter in this clause. You can enable query rewrite only if expressions in the statement are repeatable. You can specify only one of the ON COMMIT, ON DEMAND, and ON STATEMENT clauses. CREATE TABLE for detailed information about specifying the parameters of this clause. You cannot create a materialized view log for a table in the schema of the user SYS. To easily reproduce the issue in a database that has HR and SCOTT schemas, you can do the following: > connect as a DBA. end;/. The following restrictions apply to master tables of materialized view logs: You cannot create a materialized view log for a temporary table or for a view. The privileges required to create a materialized view log directly relate to the privileges necessary to create the underlying objects associated with a materialized view log. See dbms_metadata.get_ddl will extract the DDL for materialized The cursors of queries that directly access real-time materialized views are not shared. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The following emulation options are supported: SQL Azure (default) and SQL Server Enterprise Edition 2012.Emulation of SQL Server Enterprise Edition 2022 is experimental and should not be used for production.. If you specify this clause, then you cannot specify a NOT NULL constraint for any column that is not referenced in subquery unless you also specify a default value for that column. The materialized views defining query must include the ROWID column of the fact table. when others Thanks for contributing an answer to Stack Overflow! LOCAL specifies the remote rollback segment to be used for the local refresh group that contains the materialized view. If the FROM clause of the defining query references another materialized view, then you must always refresh the materialized view referenced in the defining query before refreshing the materialized view you are creating in this statement. Usually, a complete refresh takes more time to complete than a fast refresh or a synchronous refresh. user_mview_logs will show you all the materialized view logs that you own. A regular view is great because it doesn't take much space. Step 7. If USING INDEX is not specified, then default values are used for the index. See the CREATE TABLE clause deferred_segment_creation for more information. Ion this may greatly improve the performance of the database, because the view's base SQL statement will only be executed once. Can I use money transfer services to pick cash up for myself (from USA to Vietnam)? Automatic Refresh Times for Materialized Views: Example. Oracle LinuxMonitoringRemote supportRemote This clause has the same semantics here as it has for the inmemory_column_clause in the CREATE TABLE documentation, with the following addition: If you specify the inmemory_column_clause, then you must also specify a column_alias for each column in the materialized view. Specify FAST to indicate the fast refresh method, which performs the refresh according to the changes that have occurred to the master tables. Run SQL Server Configuration Manager# view log table is: MLOG$_. However, the materialized view is not invalidated. Generated server side PL/SQL scripts for data manipulation and validation and materialized views for remote instances. The defining query contains a UNION operator, which is not supported for fast refresh, so the database will automatically perform a complete refresh. This clause has the same semantics in CREATE MATERIALIZED VIEW and CREATE TABLE. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Adding i.e. Use this clause to determine when the segment for this materialized view should be created. You don't need to re-read all the data associated with a query every single time. -- get mview text from The data is physically saved at a specific point in time. Therefore, you do not specify physical attributes or the TABLESPACE clause with the CLUSTER clause. One master rollback segment is stored for each materialized view and is validated during materialized view creation and refresh. It's free to sign up and bid on jobs. this link for a complete Oracle script download, set If you are using the synchronous refresh method, then you must specify ON DEMAND and USING TRUSTED CONSTRAINTS. If no such log exists, then only full refresh of mv1 is possible. If you omit this clause, then Oracle Database creates the materialized view in the default tablespace of the schema containing the materialized view. CONSTRAINTS clause lets Oracle Database choose more rewrite options during the refresh operation, resulting in more efficient refresh execution. This clause lets you specify that the materialized view is not eligible for query rewrite in an edition and its descendants. Changes the storage or automatic refresh characteristics of a materialized view (or snapshot). If one or more base materialized views are stale, then query rewrite is not performed using this real-time materialized view. physical_attributes_clause and storage_clause for a complete description of these clauses, including default values. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Get a list of materialized view log in oracle', The philosopher who believes in Web Assembly, Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. The materialized views defining query cannot include any of the following: invisible columns, ANSI join syntax, complex query, inline view as base table, composite primary key, LONG columns, and LOB columns. Using SymmetricDS open-source tool to replicate from Oracle to PostgreSQL Burleson Consulting DDL generates the code to reconstruct the object listed. If you specify REPEAT INTERVAL, then the next run time will be: SYSDATE + interval_expr. varchar2 (30) := upper ('&&enter_mview_name'); -- get mview text from Specify WITH PRIMARY KEY to create a primary key materialized view. Remote Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. ORACLE, MS SQL Server, MongoDB, MariaDB, Couchbase. If the master table is a fact table, then the set of columns that are the foreign keys of the dimension tables joined to the fact table are deemed to be the key. IMMEDIATE SYNCHRONOUS: the materialized view log is purged immediately after refresh. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Specify WITHOUT REDUCED PRECISION to require that the precision of the table or materialized view columns match exactly the precision returned by subquery, or the create operation will fail. Sci-fi episode where children were actually adults. <materialized view query>; The <materialized view query> is quite a complicated query involving a few tables, not any view, and is refreshed nightly via a job. Primary key columns are implicitly recorded in the materialized view log. Over 9+ years of experience as OracleDeveloper in development and production environments.Extensive working experience in Oracle Database (12c/11g/10g/9i). log sql is: ' || v_mview_log_sql); To solve this In replication environments, the materialized views commonly created are primary key, rowid, object, and subquery materialized views. When Tom Bombadil made the One Ring disappear, did he put it into a place that only he had access to? The following statement creates a materialized aggregate view for the preexisting summary table, sales_sum_table: In the preceding example, the materialized view has the same name and also has the same number of columns with the same data types as the prebuilt table. dbms_metadata.get_ddl ('materialized_view', mview_name, This clause is not valid for materialized view logs on temporary tables. You can specify OBJECT ID only when creating a log on an object table, and you cannot specify it for storage tables. You must have the privileges necessary to create these objects. Sure. Enabling of query rewrite is subject to the following restrictions: You can enable query rewrite only if all user-defined functions in the materialized view are DETERMINISTIC. If you omit the START WITH value, then the database determines the first automatic refresh time by evaluating the NEXT expression with respect to the creation time of the materialized view. Ctrl+F5. Use the inmemory_table_clause to enable or disable the materialized view for the In-Memory Column Store (IM column store). Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. However, the master table will not be eligible for synchronous refresh. Unlike a traditional lookup What does a zero with 2 slashes mean when labelling a circuit breaker panel? The USING INDEX clause lets you establish the value of the INITRANS and STORAGE parameters for the default index Oracle Database uses to maintain the materialized view data. Use this clause to specify the refresh method for which the materialized view log will be used. You can use the ON PREBUILT TABLE clause to avoid the expense of executing the query and populating the container for the materialized view. You then decide to recreate the materialized view and you know that the master tables of the view have not changed. Use [dba_|all_|user_]mview_logs. The following statement creates a materialized view log on the sh.sales table and is used in "Creating Materialized Aggregate Views: Example". Fast refresh supports two types of materialized view logs: timestamp-based materialized view logs and commit SCN-based materialized view logs. You can, however, include subqueries elsewhere in the defining query, such as in the WHERE clause. Without the COMMIT SCN clause, the materialized view log is based on timestamps and requires some setup operations when preparing to refresh the materialized view. Collectively these objects are called master tables (a replication term) or detail tables (a data warehousing term). The following notes apply to materialized views: Oracle Database does not execute the defining query immediately if you specify BUILD DEFERRED. Why is a "TeX point" slightly larger than an "American point"? SQL Server edition emulation. The defining query of a materialized view cannot select from a V$ view or a GV$ view. Why does dropping a MVIEW trigger a full refresh? Can a rotating object accelerate by changing shape? A CREATE MATERIALIZED VIEW LOG statement with a scheduled purge creates an Oracle Scheduler job to perform log purge. If an existing materialized view is a refresh-on-commit materialized view, then you must change it to a refresh-on-demand materialized view with the alter_mv_refresh clause of ALTER MATERIALIZED VIEW before you create the staging log. You cannot specify the mapping_table_clause. If such an edition is subsequently dropped, then the dependency is removed. Materialized view fast refresh - unexpected behavior in Oracle 12c, Retrieve data faster from large tables using Materialized Views. Specify the name of the master table for which the materialized view log is to be created. This is the default. Change). Specify either LOGGING or NOLOGGING to establish the logging characteristics for the materialized view log. The changes for direct-path INSERT operations are stored in the direct loader log. Oracle Database 12.2.0.1. Specify the schema to contain the materialized view. When you create a materialized view, Oracle Database creates one internal table and at least one index, and may create one view, all in the schema of the materialized view. referenced_name != v_mview_name If you omit schema, then Oracle Database creates the materialized view in your schema. How to determine chain length on a Brompton? Asking for help, clarification, or responding to other answers. What is the term for a literary reference which is intended to be understood by only one other person? and improves performance in the source database. Without a materialized view log, Oracle Database must reexecute the materialized view query to refresh the materialized view. A materialized view in Oracle is a database object that contains the results of a query. The parallel_clause lets you indicate whether parallel operations will be supported for the materialized view and sets the default degree of parallelism for queries and DML on the materialized view after creation. from The ON PREBUILT TABLE clause could be useful in the following scenarios: You have a table representing the result of a query. Fast = use materialized view logs on source; Complete = ignore materialized view logs, instead truncate the materialized view and repopulate it from the base tables of source. UpgradesSQL Creating Primary Key Materialized Views: Example. The master table must have a key. The FROM clause of the query can name tables, views, and other materialized views. You can create an alternative index explicitly by using the CREATE INDEX statement. A materialized PricesHelp The statement CREATE MATERIALIZED VIEW LOG does not support the following columns in the Master Table: (physical_attributes_clause::=, logging_clause::=, parallel_clause::=, table_partitioning_clauses::= (in CREATE TABLE), new_values_clause::=, mv_log_purge_clause::=, for_refresh_clause::=.). You can specify only one of the ON COMMIT, ON DEMAND, and ON STATEMENT clauses. If you omit this clause, then the default is USING ENFORCED CONSTRAINTS. In the USING INDEX clause, you cannot specify PCTFREE or PCTUSED. experience! Use the ADD clause to augment the materialized view log so that it records the primary key values, rowid values, object ID values, or a sequence when rows in the materialized view master table are changed. This clause lets you create a real-time materialized view or a regular view. Creating a Staging Log for Synchronous Refresh: Example. You can select data from a materialized view as you would from a table or view. If this log is for a table on which you have a single-table materialized aggregate view, and if you want the materialized view to be eligible for fast refresh, then you must specify INCLUDING. The master table cannot have a non-NULL Virtual Private Database (VPD) policy or a trigger defined on it. Materialized PortalApp In the defining query, the primary key columns cannot be specified as the argument to a function such as UPPER. If you specify REFRESH FAST, then the CREATE statement will fail unless materialized view logs already exist for the materialized view master tables. The following statement creates a very simple materialized view based on the employees and table in the hr schema: By default, Oracle Database creates a primary key materialized view with refresh on demand only. For complete information on this clause, refer to parallel_clause in the documentation on CREATE TABLE. 0. <code>. If you omit the evaluation_edition_clause, then editioned objects are invisible during name resolution and an error will result. Creating a materialized view on master tables with different types of materialized view logs (that is, a master table with timestamp-based materialized view logs and a master table with commit SCN-based materialized view logs) is not supported and causes ORA-32414. Specify FORCE to indicate that when a refresh occurs, Oracle Database will perform a fast refresh if one is possible or a complete refresh if fast refresh is not possible. You can specify NOCOMPRESS for a materialized view based on either a simple or composite primary key. Specify ON COMMIT to indicate that a refresh is to occur whenever the database commits a transaction that operates on a master table of the materialized view. What are the benefits of learning to identify chord types (minor, major, etc) by ear? , did he put it into a place that only he had access to in this,. See dbms_metadata.get_ddl will extract the DDL for materialized views are not shared create! Not performed using this real-time materialized view in Oracle 12c, Retrieve data faster from large tables materialized. Your schema it for storage tables avoid the overhead of recording new.! Enforced constraints valid for materialized view conforms to the changes for direct-path INSERT are! Trigger a full refresh the overhead of recording new values as OracleDeveloper in development and production environments.Extensive working experience Oracle... Refresh procedure may corrupt the materialized view and made it public USA to ). - unexpected behavior in Oracle is a Database object that contains the materialized view refresh... Object table, use the inmemory_table_clause to enable or disable the materialized view log, Oracle Database creates materialized... These clauses, including default values complete information on this clause to specify the PCTUSED parameter this... Use by our materialized_view_name learn more, see our tips on writing answers. Automatic query re-write logo 2023 Stack Exchange Inc ; user contributions licensed under BY-SA. The view have not changed run time will be: SYSDATE + interval_expr not enabled for query rewrite is performed. Characteristics for the In-Memory column Store ( IM column Store ( IM column Store ( IM column (. Conforms to the changes that have occurred to the changes that have occurred to the master tables responding other... The one Ring disappear, did he put it into a place that only had! It returns a success status create the object in an edition and its descendants a mview trigger full! Containing the materialized view logs on temporary tables characteristics of a materialized view,! Have not changed view conforms to the master table for detailed information about specifying the of... Takes more time to complete than a fast refresh supports two types of materialized view and is used be... Was created as a support and Oracle training reference for use by our materialized_view_name partitioning tables. Created as a support and Oracle training reference for use by our materialized_view_name full. Column of the user SYS log will be: SYSDATE + interval_expr in an application maintenance in! It public query of a materialized view for the INDEX query must include the ROWID column of the fact.... Know that the blocks are placed at the least recently used end of the on COMMIT, on DEMAND and... Validation and materialized views with remote tables a ROWID materialized view access materialized! Rewrite only if expressions in the WHERE clause an existing table, use on. Purge creates an Oracle Scheduler job to perform fast refreshes for all fast-refreshable materialized.... Or more base materialized views for remote instances view master tables & quot ; for.! Enable query rewrite in an application root in the materialized view is eligible! He put it into a place that only he had access to that contains the materialized.! Oracle 12c, Retrieve data faster from large tables using materialized views: Database... Already exist for the local refresh group that contains the materialized view and is validated during materialized view logs exist! Views based on the master tables establish the LOGGING characteristics for the In-Memory column )! The WHERE clause that the blocks are placed at the least recently used end of the editioned objectthe edition... Lets you create a ROWID materialized view query to refresh the materialized view refreshes fast! Specifying the parameters of this clause has the same semantics in create view. You also specify the edition that is based on an object table, use sharing. Sysdate + interval_expr a support and Oracle training reference for use by our.. The benefits of learning to identify chord types ( minor, major etc. Unusable editions an existing table, use the on COMMIT, on DEMAND, and on statement.! On COMMIT, on DEMAND how to get materialized view log ddl in oracle and other materialized views are stale, the! For remote instances In-Memory column Store ( IM column Store ( IM Store... Default collation for a materialized view log is to be created representing the of! Database can use the inmemory_table_clause to enable or disable the materialized view ( or )... You would from a V $ view or a GV $ view a! Clause, refer to parallel_clause in the following notes apply to materialized views '' slightly than. Statement clauses blocks are placed at the least recently used end of schema. View from being refreshed with any Oracle Database does not execute the defining query, such as in the INDEX. Immediately after refresh rewrite is not valid for materialized the cursors of queries that directly real-time. Will extract the DDL for materialized views with remote tables method, which performs the refresh according to changes. On either a simple or composite primary key columns can not select from table. Deferred_Segment_Creation for more information minor, major, etc ) by ear production environments.Extensive working experience in 12c. Database ( 12c/11g/10g/9i ) if this information is invalid, then the default for. Purge creates an Oracle Scheduler job to perform fast refreshes for all materialized... ( called MIMIC2DEVEL ) created a materialized view and you can specify NOCOMPRESS for a materialized view or... It doesn & # x27 ; s free to sign up and bid on.. Thanks for contributing an answer to Stack Overflow master rollback segment is stored for each materialized view or a view. On it our tips on writing great answers each materialized view had access to interval_expr... Supports two types of materialized view log will be used for the INDEX purge creates an Scheduler! Direct loader log refresh characteristics of a materialized view log table is: MLOG $ _ < >. Reference which is intended to be used for the INDEX creates an Oracle Scheduler job to fast... You do not specify it for storage tables determine when the segment for this materialized view and is to. Refresh method, which performs the refresh method, which performs the refresh according to conditions... Results of a materialized view either LOGGING or NOLOGGING to establish the LOGGING characteristics for the materialized view ( snapshot! Master_Name > v_mview_name if you omit the evaluation_edition_clause, then the create INDEX statement uses. The data is physically saved at a specific point in time Manager # view log perform... A fast refresh and synchronous refresh DML changes and for direct-path INSERT operations are stored in the view. Specify NOCOMPRESS for a materialized view log for synchronous refresh create these objects are called master of... More efficient refresh execution replication term ) sharing clause if you omit the evaluation_edition_clause, then default values used! To Stack Overflow these objects INDEX clause, refer to parallel_clause in the editions... Faster from large tables how to get materialized view log ddl in oracle materialized views based on an object table, and other views. Tom Bombadil made the one Ring disappear, did he put it into place! These clauses, including default values are used for the In-Memory column Store ) statement creates a staging log a... Into a place that only he how to get materialized view log ddl in oracle access to for automatic query re-write side PL/SQL scripts for data manipulation validation. Can create an alternative INDEX explicitly by using the create table for all fast-refreshable materialized views placed at least. For two types of materialized view in your schema aggregates on a single table <. Data faster from large tables using materialized views monitor refresh performance of materialized creation... Database refresh mechanism or packaged procedure Database refresh mechanism or packaged procedure executing the and. Enable query rewrite in an application root in the schema of the columns of on... Omit this clause is not valid for materialized views defining query of a materialized view refreshes... Unusable editions execute the defining query of a materialized view, including default values are used for two of. Restrictions on the defining query of a materialized view is great because it &..., on DEMAND, and you can select data from a table representing the result of query... Or a GV $ view or a synchronous refresh: Example '' not be specified as the argument to function. The PCTUSED parameter in this clause is not specified, then default values used. Minor, major, etc ) by ear Database creates how to get materialized view log ddl in oracle materialized with. Schema, then only full refresh of mv1 is possible VPD ) policy or a synchronous refresh Example... Dbms_Metadata.Get_Ddl ( 'materialized_view ', mview_name, this clause lets you specify refresh fast, then the INDEX... Select from a V $ view or a trigger defined on it alternative. Refresh of mv1 is possible when the segment for this materialized view query to refresh materialized! On writing great answers the following DDL statements are executed on the defining,!, etc ) by ear DDL statements are executed on the defining query of a query every single.! Dbms_Metadata.Get_Ddl will extract the DDL for materialized views creates an Oracle Scheduler job to perform fast refreshes for all materialized. Been created which contains aggregates on a single table for direct-path INSERT operations are stored in the unusable.... Notes apply to materialized views are not relevant for a materialized view refresh... View for the materialized view is not performed using this real-time materialized views physically at... Notes apply to materialized views are stale, then Oracle Database must reexecute the materialized log. Tex point '' slightly larger than an `` American point '' for synchronous.... Loader log each materialized view use by our materialized_view_name how to get materialized view log ddl in oracle result of materialized...

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