Please some opinion in the free partitioning for Oracle standard Edition project
- From: "Juan Carlos Reyes Pacheco" <juancarlosreyesp@xxxxxxxxx>
- To: "Oracle Freelists.org" <Oracle-L@xxxxxxxxxxxxx>
- Date: Thu, 14 Sep 2006 13:46:59 -0400
Hi, if you have some feedback please this is the proyect basically, I hope
be in this year
check it first please.
http://www.oracleboliviaspecialists.com/partition_scheme.bmp
For every thing there is a function in a master package for every
partitioned table, for example there is a function to create addition
partitions
1. you have the table partitioned in several tables, every table is a
partition, every one has the indexes it needs
2. the information about range of every partition is store in the partitions
information table, the table name, and the range, and other info,
there is a header table for partitioned tables is not in the scheme,
sorry.
3. You can create global indexes, this are iot tables storing primary key,
the table partition where its stored and the rowid in that table
4. how you query?
a. you have a view, union all of all tables, this give a transparent full
access
b. you have a function table using the globalindextable
c. you have a function table which queries only the tables partitiosn you
need, the primary key are parameter in the function table
5. To insert,update you use a temporary table, a funcion move data from the
temporary table to the proper partition, based on the partitions information
table
6. To delete there is function too, using the partitions table information
The main benefits are the fact
1. to create historic data, you can create a new partition and move it to a
read only tablespace
2. you can improve the access in historic tables having a lot of historic
rows which are rarely accessed
This doesn't too simple, but the performance improvement in big tables
deserves the effort.
I either see really as a complex proyect to program, is true there will be
lots of details, specially to add list partitioning, etc.
If you have some idea about improving this free project partitioning
concept, you are welcome.
:)
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