> With hstore we can easily create GiST index for effective access.
>
> 2010/11/12 Peter Bex <
Peter.Bex@xs4all.nl>
>>
>> On Fri, Nov 12, 2010 at 10:17:50AM +0300, Dmitriy Igrishin wrote:
>> > Hey Mark,
>> >
>> > Yeah, I can't imagine an entity in a real project even with more than
>> > 100
>> > columns. Its rare case.
>> > But if you entities (rows/tuples) of some class (table) can contains
>> > variable
>> > set of columns (properties) you can look at hstore contrib module.
>>
>> What can also work extremely well is storing the data in an array.
>> If you need to access the array based on more meaningful keys you could
>> store key/index pairs in another table.
>>
>> This approach only works well if you have multiple arrays with the same
>> layout. You probably also need to build up your query dynamically if
>> you need to access variable numbers of datapoints.
>>
>> Cheers,
>> Peter
>> --
>>
http://sjamaan.ath.cx >> --
>> "The process of preparing programs for a digital computer
>> is especially attractive, not only because it can be economically
>> and scientifically rewarding, but also because it can be an aesthetic
>> experience much like composing poetry or music."
>> -- Donald Knuth
>>
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>
>
> --
> // Dmitriy.
>
>
>
