| Moving data from one table to another [message #664009] |
Mon, 03 July 2017 06:11  |
clancypc
Messages: 36
Registered: December 2006
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I have a call record repository that I want to make some changes to the structure of the underlying table. At the moment I store 100 days of data where each day is partitioned into 60 time periods to load the data into. I want to introduce a subpartition to this which is a hash of the anumber. I have attached the current and the new definitions in a file.
I believe that I cannot amend the template of an existing table to do this but have to create a new table and move the data from the old table to the new table. This is where I start to have problems, there are approx 146M records per day to be moved so doing a "insert into select * ..." is not very feasible I don't think. Instead I was looking into the exchange partition route. So the code for this would be something like ALTER TABLE DAY_TABLES_2 EXCHANGE PARTITION JDAY_180_00_00 WITH TABLE DAY_TABLES;
Do I have to run the same query for every partition on DAY_TABLES?
Thanks,
Peter
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