How do I view Mview logs?
How do I view Mview logs?
Select the Materialized View Log type in the dialog. Specify a table name and schema, on which materialized view log will be created. Set materialized view log options. Optionally select columns to record them in materialized view log for all changed rows of master table in the Columns grid.
What is Mview log?
In an Oracle database, a materialized view log is a table associated with the master table of a materialized view. When master table data undergoes DML changes (such as INSERT, UPDATE, or DELETE), the Oracle database stores rows describing those changes in the materialized view log.
How do I create a log for materialized view?
CREATE MATERIALIZED VIEW LOG
- Use the CREATE MATERIALIZED VIEW LOG statement to create a materialized view log, which is a table associated with the master table of a materialized view.
What is Mlog$ table in Oracle?
MLOG$ Table. An MLOG$ table is the Snapshot Log table created against a base table. A row is inserted into the table each time a change (insert/update/delete) is made to the base table.
How can I get DDL package?
You can get any package’s get ddl ( create script ) as follows. SQL> SELECT DBMS_METADATA. GET_DDL(‘PACKAGE’,’OBJECT_NAME’,’SCHEMA_NAME’) FROM DUAL; You can get any package’s body get ddl ( create script ) as follows.
How can I get DDL of view?
Simply replace TABLE with VIEW and Table_Name with a View_Name in your dbms_metadata. get_ddl() call. just be aware that text of view will/could be different from originally submitted.
How does Oracle materialized view work?
A materialized view in Oracle is a database object that contains the results of a query. They are local copies of data located remotely, or are used to create summary tables based on aggregations of a table’s data. Materialized views, which store data based on remote tables are also, know as snapshots.
What is a limitation of a materialized view?
Materialized views cannot be nested on other materialized views. Materialized views cannot query external tables. Only the standard SQL dialect is supported for materialized views. If you delete a base table without first deleting the materialized view, queries over the materialized view fail, as do refreshes.
How do you view DDL of a table in Oracle?
You can also do this for all tables at once: select dbms_metadata. get_ddl(‘TABLE’, table_name) from user_tables; and spool the output into a SQL script.
How do you take DDL from a table?
- Statement 1. CREATE TABLE My_Table (COLUMN1 VARCHAR2(1), COLUMN2 NUMBER(1)) Table created.
- Statement 2. BEGIN DBMS_METADATA. SET_TRANSFORM_PARAM(DBMS_METADATA.
- Statement 3. select DBMS_METADATA.GET_DDL(object_type, object_name) from user_objects where object_type = ‘TABLE’ and object_name = ‘MY_TABLE’
How do I create a DDL script in SQL?
4.2 Generating DDL
- On the Workspace home page, click the SQL Workshop.
- Click Utilities.
- Click Generate DDL. The Generate DDL page appears.
- Click Create Script. The Generate DDL Wizard appears.
- Select a database schema and click Next.
- Define the object type: Output – Specify an output format.
- Click Generate DDL.
What is a materialized view log?
A materialized view log is a table associated with the master table of a materialized view. Use the ALTER MATERIALIZED VIEW LOG statement to alter the storage characteristics or type of an existing materialized view log.
What is MView_ID in Salesforce?
The parameter mview_id is mutually exclusive with the three remaining parameters: mviewowner, mviewname, and mviewsite. If you want to execute this procedure based on the identification of the target materialized view, specify the materialized view identification using the mview_id parameter.
How to specify join columns for materialized view logs?
Specifying Join Columns for Materialized View Logs: Example The following statement creates a materialized view log on the order_items table of the sample oe schema. The log records primary keys and product_id, which is used as a join column in “Creating a Fast Refreshable Materialized View: Example”.
How do I find purge time for a materialized view log?
To learn whether the purge time or interval has already been set for this materialized view log, query the *_MVIEW_LOGS data dictionary views. See the CREATE MATERIALIZED VIEW LOG clause mv_log_purge_clause for the full semantics of this clause.