Hi Sergei, I understand that having a cursor like syntax we would have to write some new code . What I would have liked to know is that the more details should be discussed which need to be incorporated in the implementation of the aggregate functions. Basically what I am asking is what all details have to be there in the implementation of the aggregate functions.
On Fri, Mar 4, 2016 at 10:21 PM, Sergei Golubchik <[email protected]> wrote: > Hi, Varun! > > On Mar 04, Varun Gupta wrote: > > With the syntax more or less clear to us, can we have a discussion about > > how we have to go on with the implementation for the aggregate functions. > > Firstly I thought I should look at the implementation of CREATE FUNCTION, > > any other suggestions ? > > Sure, why not. But, as you've seen, that suggested syntax is almost > identical to the standard one, so hopefully it'll need very little > changes to the current CREATE FUNCTION implementation. > > More important would be to look at the function execution (not > definition). This mainly happens in sql/sp_head.cc but other sql/sp_* > files are also used. > > This cursor-like syntax introduces an new mode of executing stored > routines. Currently, a routine (a procedure or a function) is executed > completely from the beginning to the end. But with this cursor-like > syntax, the server will need to start executing a stored function, stop > at the FETCH statement, postpone the execution, then later continue from > that point. There is no code to do it now. > > Regards, > Sergei > Chief Architect MariaDB > and [email protected] >
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