On 4 April 2014 13:04, Oleg Bartunov <obartunov@xxxxxxxxx> wrote: > On Fri, Apr 4, 2014 at 12:20 PM, Armand Turpel > <armand.turpel.mnhn@xxxxxxxxx> wrote: >> Hi, >> >> A few questions about jsonb and hstore: >> >> 1. does jsonb replace hstore? > > no, it's different data type > >> 2. compatibility of jsonb <> hstore? > > hstore is a simple key-value model, while jsonb - richer document-based model. > >> 3. will the development of hstore continue? > > I don't believe so, we froze nested hstore to concentrate development > resources to jsonb. Nested hstore still available from > http://www.sigaev.ru/git/gitweb.cgi?p=hstore.git;a=summary > It's should be compatible with 9.3 > > >> 4. is it recommended to use jsonb when planning new projects? > > yes, we are working on jsonb support. One major advantage of hstore over json/jsonb at the moment is data manipulation, which could make json/jsonb a non-starter for some. For example, in hstore one can do: -- remove a key/value pair by key UPDATE mytable SET hcolumn = hcolumn - 'mykey'::text; or: -- remove a key/value pair by key/value UPDATE mytable SET hcolumn = hcolumn - 'mykey=>myvalue'::hstore; or: -- add/replace a key/value pair UPDATE mytable SET hcolumn = hcolumn || 'newkey=>newvalue'::hstore; You can't do something like that with json/jsonb at the moment, and that's not going to be possible in the upcoming version either. You'd probably have to resort to application-side modification, or use something like pl/v8. -- Thom -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
