Getting Started with PL/SQL Table Functions: Pipelined Table Functions

Pipelined table functions are table functions in which rows are returned or "piped" back to the calling query before the function has completed, avoiding the blocking behavior of normal PL/SQL functions and reduce PGA consumption.

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Practically Perfect PL/SQL with Steven Feuerstein

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[srinivass]

Awesome Steven loved it!!!! What a powerful feature !!

[somnathbanerjee]

Steven Sir can we create object types inside a package specification for use as return type on pipelined table function?

[terrikool]

Thanks for this video, Steven! Quick question. When I create my table do I have to specify the number of rows? I want to try using a pipelined table to populate a table when I gather multiple columns from two separate tables. I’ve tried using CTEs and an inner join, which was almost successfully until I started to get multiple rows with duplicate data returned when I only needed the one row. I did try a select distinct to remove the duplicate rows but that proved futile of an effort. I’ve recently signed up for Dev Gym and watching your videos has given me some other ideas to try

[akashjain]

Hi Steven, I have a question . As you mentioned in the "rownum<10" example, the select checks that if 9 rows have been returned then stop the pipelined process. So, does this involve context switching between SQL and PL/SQL engine? If yes, then will a bigger value create performance issue i.e. something like rownum ? Thanks

[sakthikumarperiyasamy]

Awesome !! Then is there a real advantage using non pipelined functions, should we always using pipelined functions?

[ramakantsahoo]

I have one question, I tried many time used cursor variable with return type inside package specification but
it got failed . It shows pls-00994 error

[lucasbotelho]

You don't need to open the cursor rows_in before fetch then ?