2012/3/16 Etsuro Fujita <fujita.ets...@lab.ntt.co.jp>: > I have a plan to support 'Create index on foreign table' for 9.3. Here > is my plan.
Very interesting idea, but... > The index creation is supported for a flat file such as CSV and a remote > table on a RDB e.g., Postgres using CREATE INDEX. Why do you limit the target type to those two? How about web services and non-relational databases? Some web services would provide id-to-content mapping, and KVSs are obviously accessible by key. IMHO CREATE INDEX for foreign tables should have general design, not specific to some kind of FDWs. > I'd like to build the index physical data file for a flat file using the > index access method of regular tables (ie btree, hash, gin, gist, and > spgist) based on the following transformation between the TID and the > file offset to some data in the file: > > block_number = file_offset_to_some_data / BLCKSZ > offset_number = file_offset_to_some_data % BLCKSZ Indeed these information would help searching data stored in local files. But, again, it seems too specific to file-based FDWs. I'd suggest separating basic general design and implementation by FDWs. The design you shown here seems indexed-file_fdw to me... Regards, -- Shigeru HANADA -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers