对于SSIS，表视图或条件拆分，哪个更快？

Question

I have an SSIS project where one of the steps involves populating a SQL Server table from an Oracle Table.

The Oracle table has a column ssis_control_flag . I want to pull across all records that have this field set to 'T'.

Now, I was wondering which would be the best way of doing this, and the two options as I have detailed in the question presented themselves.

So really, I am wondering which would be faster/better. Should I create a conditional split in the SSIS package that filters off all the records I want? Or should I create a view in Oracle that selects the records based on the criteria, and utilise that view as the data source in SSIS?

Or is there an even better way of doing this? You help would be much appreciated!

Thanks

Answer 1

Why don't you use a WHERE clause to filter the records, instead of creating a view? May be I am not getting your question correctly.

Then in general, bringing all the data to SSIS and then filtering out is not recommended. Especially when you can do the filtering at the source DB end itself. Consider the network bandwidth costs as well.

Then this particular filter that you are talking about here, cannot be done with a better efficiency in SSIS than that can be done at DB. Hence better do it in the Oracle DB itself.

Answer 2

您可以使用将openrowset用作数据流源的查询，而不用直接访问Oracle表。