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Can someone explain me internal structure of postgresql gist index? Does it use the same structure for rtree_gist, btree_gist and other implementations of gist? And what is the difference from b-tree?

Thanks a lot for the answer.

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You'll be best off starting with the documentation: postgresql.org/docs/current/static/gist.html ... then the source code. I don't think you're going to get what's effectively some new detailed documentation written for this. I'd probably help you if I knew but I haven't dug into that part of PostgreSQL's innards yet. What's the actual problem you're trying to solve here? What do you want to do? Why do you want to know this? – Craig Ringer Mar 31 '15 at 4:24

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