Re: SQL/JSON in PostgreSQL

On Sun, Sep 17, 2017 at 11:08 AM, Oleg Bartunov <obartunov@gmail.com> wrote:

> On 16 Sep 2017 02:32, "Nikita Glukhov" <n.gluhov@postgrespro.ru> wrote:
>
> On 15.09.2017 22:36, Oleg Bartunov wrote:
>
> On Fri, Sep 15, 2017 at 7:31 PM, Robert Haas <robertmhaas@gmail.com>
>> wrote:
>>
>>> On Fri, Sep 15, 2017 at 10:10 AM, Daniel Gustafsson <daniel@yesql.se>
>>> wrote:
>>>
>>>> Can we expect a rebased version of this patch for this commitfest?
>>>> Since it’s
>>>> a rather large feature it would be good to get it in as early as we can
>>>> in the
>>>> process.
>>>>
>>> Again, given that this needs a "major" rebase and hasn't been updated
>>> in a month, and given that the CF is already half over, this should
>>> just be bumped to the next CF.  We're supposed to be trying to review
>>> things that were ready to go by the start of the CF, not the end.
>>>
>> We are supporting v10 branch in our github repository
>> https://github.com/postgrespro/sqljson/tree/sqljson_v10
>>
>> Since the first post we made a lot of changes, mostly because of
>> better understanding the standard and availability of technical report
>> (http://standards.iso.org/ittf/PubliclyAvailableStandards/c0
>> 67367_ISO_IEC_TR_19075-6_2017.zip).
>> Most important are:
>>
>> 1.We abandoned FORMAT support, which could confuse our users, since we
>> have data types json[b].
>>
>> 2. We use XMLTABLE infrastructure, extended for  JSON_TABLE support.
>>
>> 3. Reorganize commits, so we could split one big patch by several
>> smaller patches, which could be reviewed independently.
>>
>> 4. The biggest problem is documentation, we are working on it.
>>
>> Nikita will submit patches soon.
>>
>
> Attached archive with 9 patches rebased onto latest master.
>
> 0001-jsonpath-v02.patch:
>  - jsonpath type
>  - jsonpath execution on jsonb type
>  - jsonpath operators for jsonb type
>  - GIN support for jsonpath operators
>
> 0002-jsonpath-json-v02.patch:
>  - jsonb-like iterators for json type
>  - jsonpath execution on json type
>  - jsonpath operators for json type
>
> 0003-jsonpath-extensions-v02.patch:
> 0004-jsonpath-extensions-tests-for-json-v02.patch:
>  - some useful standard extensions with tests
>  0005-sqljson-v02.patch:
>  - SQL/JSON constructors (JSON_OBJECT[AGG], JSON_ARRAY[AGG])
>  - SQL/JSON query functions (JSON_VALUE, JSON_QUERY, JSON_EXISTS)
>  - IS JSON predicate
>
> 0006-sqljson-json-v02.patch:
>  - SQL/JSON support for json type and tests
>
> 0007-json_table-v02.patch:
>  - JSON_TABLE using XMLTABLE infrastructure
>
> 0008-json_table-json-v02.patch:
>  - JSON_TABLE support for json type
>
> 0009-wip-extensions-v02.patch:
>  - FORMAT JSONB
>  - jsonb to/from bytea casts
>  - jsonpath operators
>  - some unfinished jsonpath extensions
>
>
> Originally, JSON path was implemented only for jsonb type, and I decided to
> add jsonb-like iterators for json type for json support implementation with
> minimal changes in JSON path code.  This solution (see jsonpath_json.c from
> patch 0002) looks a little dubious to me, so I separated json support into
> independent patches.
>
> The last WIP patch 0009 is unfinished and contains a lot of FIXMEs.  But
> the ability to use arbitrary Postgres operators in JSON path with
> explicitly
> specified  types is rather interesting, and I think it should be shown now
> to get a some kind of pre-review.
>
> We are supporting v11 and v10 branches in our github repository:
>
> https://github.com/postgrespro/sqljson/tree/sqljson
> https://github.com/postgrespro/sqljson/tree/sqljson_wip
> https://github.com/postgrespro/sqljson/tree/sqljson_v10
> https://github.com/postgrespro/sqljson/tree/sqljson_v10_wip
>
>
> We provide web interface to our build
> http://sqlfiddle.postgrespro.ru/#!21/
>

+1,
For experimenting with SQL/JSON select "PostgreSQL 10dev+SQL/JSON" in the
version select field on top toolbar.

------
Alexander Korotkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company