Whenever you are considering creation of multicolumn index, there is a question what should be the order of columns in this index. I'll try to analyze various cases of this situation.
Tag: comparison
To rule or not to rule – that is the question
Every now and then there is someone on IRC, mailing lists, or private contact which asks about rules.
My answer virtually always is: don't use rules. If you think that they solve your problem, think again. Why?
Continue reading To rule or not to rule – that is the question
searching for longest prefix
couple of times is was brought to attention of #postgresql channel – how to find longest prefix.
case: you have phone number, and you want to find which carrier it is bound to.
there are at least 3 ways of finding it, and i decided to take a look at which is fastest.