Re: SQL/JSON: functions

On 3/8/21 1:55 PM, Ibrar Ahmed wrote:
>
>
> On Sat, Jan 23, 2021 at 3:37 PM Erik Rijkers <er(at)xs4all(dot)nl
> <mailto:er(at)xs4all(dot)nl>> wrote:
>
> On 2021-01-20 03:49, Nikita Glukhov wrote:
>
> > [0001-Add-common-SQL-JSON-clauses-v52.patch.gz]
> > [0002-SQL-JSON-constructors-v52.patch.gz]
> > [0003-IS-JSON-predicate-v52.patch.gz]
> > [0004-SQL-JSON-query-functions-v52.patch.gz]
> > [0005-SQL-JSON-functions-for-json-type-v52.patch.gz]
> > [0006-GUC-sql_json-v52.patch.gz]
>
> Hi,
>
> I read through the file func.sgml (only that file) and put the
> errors/peculiarities in the attached diff.  (Small stuff; typos
> really)
>
>
> Your patch includes a CREATE TABLE my_films + INSERT, to run the
> examples against.  I think this is a great idea and we should do
> it more
> often.
>
> But, the table has a text-column to contain the subsequently inserted
> json values. The insert runs fine but it turns out that some later
> examples queries only run against a jsonb column.  So I propose to
> change:
>    CREATE TABLE my_films (js text);
> to:
>    CREATE TABLE my_films (js jsonb);
>
> This change is not yet included in the attached file.  An alternative
> would be to cast the text-column in the example queries as js::jsonb
>
>
> I also noticed that some errors were different in the sgml file
> than 'in
> the event':
>
>
>     SELECT JSON_QUERY(js, '$.favorites[*].kind' ERROR ON ERROR) FROM
> my_films_jsonb;
>     (table 'my_films_jsonb' is the same as your 'my_films', but
> with js
> as a jsonb column)
>
> manual says: "ERROR: more than one SQL/JSON item"
>   in reality: "ERROR: JSON path expression in JSON_QUERY should
> return
> singleton item without wrapper"
>          and:   "HINT: use WITH WRAPPER clause to wrap SQL/JSON item
> sequence into array"
>
>
> Thanks,
>
> Erik Rijkers
>
> >
> > --
> > Nikita Glukhov
> > Postgres Professional: http://www.postgrespro.com
> <http://www.postgrespro.com>
> > The Russian Postgres Company
>
>
> The patch (func.sgml.20210123.diff) does not apply successfully.
>
> http://cfbot.cputube.org/patch_32_2901.log
> <http://cfbot.cputube.org/patch_32_2901.log>
>
> ----
> === Applying patches on top of PostgreSQL commit ID 0ce4cd04da558178b0186057b721c50a00b7a945 ===
> === applying patch ./func.sgml.20210123.diff
> patching file doc/src/sgml/func.sgml
> Hunk #1 FAILED at 16968.
> Hunk #2 FAILED at 17034.
> ...
> Hunk #19 FAILED at 18743.
> 19 out of 19 hunks FAILED -- saving rejects to file doc/src/sgml/func.sgml.rej
> ----
>
> Can we get a rebase? 
>
> I am marking the patch "Waiting on Author".

I've rebased this, and applied some of Erik's changes.

I'll set it back to 'Needs Review' if the cfbot is happy.

cheers

andrew

--
Andrew Dunstan
EDB: https://www.enterprisedb.com