Oracle In-Database Archival features, including ROW ARCHIVAL and ROW
MOVEMENT, with partitioning on ORA_ARCHIVE_STATE in the context of
financial transactions.
Introduction
Financial
transactions generate vast amounts of data, which can quickly become
difficult to manage and query as the data grows. To address this,
organizations must adopt strategies that help them manage and maintain
this data efficiently. Oracle provides several features that can help
you achieve this goal, including In-Database Archival features.
This
white paper discusses how you can use In-Database Archival features,
such as ROW ARCHIVAL and ROW MOVEMENT, in conjunction with partitioning
on the ORA_ARCHIVE_STATE column to more efficiently manage financial
transaction data.
ROW ARCHIVAL
ROW ARCHIVAL is a
feature that allows you to mark rows in a table as archived. Archived
rows are no longer active, but are retained in the database for
historical purposes. By marking rows as archived, you can reduce the
amount of data that needs to be actively managed and queried, while
still maintaining access to historical data.
To enable ROW ARCHIVAL, you can use the following SQL statement:
ALTER TABLE table_name ENABLE ROW ARCHIVAL;
This
statement enables ROW ARCHIVAL for the specified table. Once ROW
ARCHIVAL is enabled, a new column called ORA_ARCHIVE_STATE is
automatically added to the table. This column is used to store
information about the archival state of each row in the table, including
whether it is active or archived.
You can mark a row as archived
by setting the value of the ORA_ARCHIVE_STATE column to 1 using an
update statement. For example:
UPDATE table_name SET ORA_ARCHIVE_STATE = 1 WHERE row_id = 123;
This statement marks the row with row_id 123 as archived.
ROW MOVEMENT
ROW
MOVEMENT is a feature that allows you to move rows within a table or
between tables. This feature is particularly useful when used in
conjunction with ROW ARCHIVAL, as it allows you to move archived rows to
a separate table or partition. This can improve the performance of
queries on active data and reduce the overall storage requirements of
your database.
To enable ROW MOVEMENT, you can use the following SQL statement:
ALTER TABLE table_name ENABLE ROW MOVEMENT;
This statement enables ROW MOVEMENT for the specified table. Once ROW MOVEMENT is enabled, you can move rows by updating the ORA_ARCHIVE_STATE.
PARTITIONING ON ORA_ARCHIVE_STATE
Partitioning
is a feature that allows you to split a table into smaller, more
manageable pieces. By partitioning a table, you can more easily manage
data retention policies, data aging, and data archival.
To enable partitioning on the ORA_ARCHIVE_STATE column, you can use the following SQL statement:
ALTER TABLE table_name MODIFY PARTITION BY LIST (ORA_ARCHIVE_STATE )
(
partition p0 values ('0') TABLESPACE active_data
partion p1 values ('1') TABLESPACE archive_data
);
This statement adds a partition to the table for archived rows. Once you update the value of ORA_ARCHIVE_STATE archived rows will move from Active partition to Archive partition.
CONCLUSION
In
conclusion, managing financial transaction data can be a daunting task,
but In-Database Archival features provided by Oracle can help you
manage and maintain this data efficiently. By using ROW ARCHIVAL and ROW
MOVEMENT in conjunction with partitioning on the ORA_ARCHIVE_STATE
column, you can more easily manage data retention policies, data aging,
and data archival. With this strategy, you can reduce the amount of data
that needs to be actively managed and queried, while still maintaining
access to historical data. This can improve the performance of queries
on active data and reduce the overall storage requirements of your
database. Overall, using these features can help you achieve better data
management, easier data analysis, and better overall database
performance.
