Move the data from the partitions again tablespace - direct table filled by ETL
Hello
We have a large composite table date-range/hash partitioned table (using time partitioning 11.2.0.3 range)
1 partition for each month and each such partition 4 under separate partitions.
We want to move some data from most significant storage but also direct table and inserted in all the days as part of the data warehouse and large table want to ensure
operations below result in errors in the data loading procedure
Suppose also should not take long to run lines 40 million or more each month.
Select *.
Of user_tab_partitions
Where table_name = 'CUSTOMER_TRANSACTION '.
And nom_partition like 'SYS % '.
- (1) Alter table retailer_transaction and rename partition < nom_partition > CUST_PART_ < YYYYMM >
- (2) tablespace create dedicated for the month of the affected partition
- ((3) alter table retailer_transaction move tablespace subpartition < sys... > < partition_tablespace > created in 2) above
ALTER table retailer_transaction change the default attributes for the partition < CUST_PART < YYYYMM > < tablespace in 2 above > tablespace)
4 global index which would eventually rebuild afterwards due to the transition if movement makes no valid.
Several local bitmap indexes that belong to partitions.
Thoughts?
Thank you
I agree in a good store of data, everything should be according to the best practices ETL or guideline. I guess it is a FACT table, because it's big enough. A method that I can share (followed in the real world big DW) is "ELP" IE Partition Exchange loading. You can find the basic architecture of the Internet.
The basic architecture is as
The source (in your case partitioned) Table--> (unpartitioned) intermediate Table--> Table possible target (partitioned)--> the cleaning activities (and overtime).
You can use any ETL tool for this (I won't mention any other reasons).
Later, you can delete the original table and use that new table as your FACT table, your application will be available all the time. There are drawbacks as most uses of double-spaced, other than normal ETL these work will take certain amount of resources so that other ALS etc. In addition, if you load a few current days during these activities you plan / program accordingly.
Your demo is also fine, but regular ETL may fail because you rename the partitions (some uses of ETL tool partition name, in case you ever ELP) also unusable global indexes can cause failure (you have local too?).
Tags: Database
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d.processing_date
M 'MIND_ACCOUNTS '.
INNER JOIN 'DATA' m.account_id d = d.merchant_cid
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WHERE (d.processing_date > = To_date ('] '))
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q'[',' dd-mm-yyyy ")"]
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immediately run v_sql;
END CREATE_STATS_5D;
END PKG_RISK_MONITOR;
/
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