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Re: Limitations of PostgreSQL

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Wow, I must be missing something, because I cannot even dream up a case where I think I might find a use for the mysql INTERVAL() function, far less actually NEED it :)

Terry

Michael Fuhr wrote:
On Wed, Oct 12, 2005 at 04:49:59PM -0500, Scott Marlowe wrote:

On Wed, 2005-10-12 at 16:16, Chris Travers wrote:

Compared to MySQL, I can't think of any downsides. All relevant usability issues have been solved, though there are some functions like INTERVAL that are not supported (see my migration guide at http://www.metatrontech.com/wpapers/)

What, exactly, is the interval function in MySQL?  IS that one that
creates a sequence of numbers or whatnot?  If so, there is an equivalent
in 8.0 now.  By the way, interval is a SQL reserved keyword, so it's
surprising MySQL would choose to name a function after it.


Surprising?  C'mon now, this is MySQL :->

Here's an excerpt from the MySQL documentation:

INTERVAL(N,N1,N2,N3,...)
    Returns 0 if N < N1, 1 if N < N2 and so on or -1 if N is
    NULL.  All arguments are treated as integers.  It is required
    that N1 < N2 < N3 < ... < Nn for this function to work
    correctly.  This is because a binary search is used (very fast).

    mysql> SELECT INTERVAL(23, 1, 15, 17, 30, 44, 200);
            -> 3
    mysql> SELECT INTERVAL(10, 1, 10, 100, 1000);
            -> 2
    mysql> SELECT INTERVAL(22, 23, 30, 44, 200);
            -> 0


--
Terry Fielder
terry@xxxxxxxxxxxxxxxxxx
Associate Director Software Development and Deployment
Great Gulf Homes / Ashton Woods Homes
Fax: (416) 441-9085

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TIP 6: explain analyze is your friend

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