[HACKERS] BTree index and optimizer
Hello: I am trying to find out, how is the B-tree index implemented for multiple columns? does Postgres, just concatenate the columns --- if this is the case, then how is the search performed? Also, does the optimizer choose the index, only when the constraining is on the leading subset of the index column? Thanks VJ ---(end of broadcast)--- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html
[HACKERS] BTree information
I am trying to find information regarding creation of B-tree index in postgres for variable length character data (Char/varchar type). Specifically, what pagination policy is used, does it use prefix, or any other form of compression (encoding)? Regards, VJ Anand ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
