From: Lars-Erik Bjørk
Date: June 30 2009 1:41pm
Subject: IndexRootPage::splitIndexPage
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Hi all!

I have been looking at indexRootPage::splitIndexPage, and a small part 
of it seems a little strange to me. It will not provoke a bug, but it is 
confusing when reading it.

The method is declared to return a bool. When splitting an index page, 
the method will recursively call itself if the parent page also needs to 
be split. The recursion will stop when the parent page does not need to 
be split, or the root page is split. In this case, it will return false.

The recursion looks like this


...

if (splitIndexPage (dbb, indexId, parentBdb, transId, result, &splitKey,
                               splitPageNumber, (parentBdb->pageNumber 
== rootPageNumber)))
     return true;

...

However, this is the only place the method returns true, so therefore it 
can actually never return true.

The return value, which will always be false is also used in a branch in 
IndexRootPage::addIndexEntry.

Do you agree with this? It is ok if I rewrite this to be a void method 
instead? It will improve the readability, and we will avoid the 
possibility that someone will use the return value in the future.

Best,

Lars-Erik