Re: [GENERAL] hstore/jsonb support in hibernate/JPA
On 07/22/2014 07:10 PM, Martin Gudmundsson wrote: Hi all! I saw that Rails 4 comes with hstore support out of the box. Does anyone know if there’s any integrated support like that in hibernate or any other JPA implementation? I know your able to write your own custom datatypes, but I’m looking for integrated standardized support in the base library. I haven't seen any JPA providers with built-in support for hstore. Unfortunately there's also no type extension SPI for JPA, so the is no standard way to provide extension types that don't depend directly on a particular JPA provider's guts. Frankly I think the concept of JPA for fully provider-independent portable dev is a waste of time for anything except toy apps or very small databases - anything real generally needs per-query fetch control and other things JPA just doesn't provide for. I suggest picking a provider and sticking to it. If you're developing a new app, rather than targeting hstore, consider starting work with PostgreSQL 9.4 (currently in beta-2) and using the jsonb type. That way you can use the numerous good quality json tools in Java to map json to/from Java objects or manipulate json trees, while saving them to the DB and loading them from the DB as native json fields. If you use hstore, you'll have to write the equivalent yourself or crib from someone else. So why not start on the right foot and go straight for jsonb? -- Craig Ringer http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training Services -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] hstore - jsonb
On Fri, Apr 4, 2014 at 12:20 PM, Armand Turpel armand.turpel.m...@gmail.com 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. Thanks Armand -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] hstore - jsonb
On 4 April 2014 13:04, Oleg Bartunov obartu...@gmail.com wrote: On Fri, Apr 4, 2014 at 12:20 PM, Armand Turpel armand.turpel.m...@gmail.com 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@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] hstore - jsonb
We'll work on contrib/jsonxtra with all operators ported from hstore and release it after 9.4 as separate extension. On Fri, Apr 4, 2014 at 4:32 PM, Thom Brown t...@linux.com wrote: On 4 April 2014 13:04, Oleg Bartunov obartu...@gmail.com wrote: On Fri, Apr 4, 2014 at 12:20 PM, Armand Turpel armand.turpel.m...@gmail.com 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@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] hstore - jsonb
On 4 April 2014 16:15, Oleg Bartunov obartu...@gmail.com wrote: We'll work on contrib/jsonxtra with all operators ported from hstore and release it after 9.4 as separate extension. That would be useful. :) Would there be an aim of getting that in-core for 9.5? -- Thom -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] hstore - jsonb
On Fri, Apr 4, 2014 at 7:17 PM, Thom Brown t...@linux.com wrote: On 4 April 2014 16:15, Oleg Bartunov obartu...@gmail.com wrote: We'll work on contrib/jsonxtra with all operators ported from hstore and release it after 9.4 as separate extension. That would be useful. :) Would there be an aim of getting that in-core for 9.5? I hope so. -- Thom -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
