Horton
Menu

Re: Re: SQL/JSON: functions

Andy Alsup <bluesbreaker@gmail.com>

View thread
From: Andrew Alsup <bluesbreaker@gmail.com>
To: Nikita Glukhov <n.gluhov@postgrespro.ru>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>, Thomas Munro <thomas.munro@gmail.com>, Andres Freund <andres@anarazel.de>, Dmitry Dolgov <9erthalion6@gmail.com>, Pavel Stehule <pavel.stehule@gmail.com>, Oleg Bartunov <obartunov@postgrespro.ru>, Alexander Korotkov <a.korotkov@postgrespro.ru>, Michael Paquier <michael@paquier.xyz>, Simon Riggs <simon@2ndquadrant.com>, Andrew Dunstan <andrew.dunstan@2ndquadrant.com>
Date: 2019-10-22T00:50:02Z
Lists: pgsql-hackers 
On 10/21/19 12:44 PM, Nikita Glukhov wrote:
>
> v39 patch is based on 5ee96b3e2221d154ffcb719bd2dee1179c53f821
>
> Use the following git command to apply patches:
>
> git am ~/Downloads/0001-Jsonpath-support-for-json-v39.patch
>

Thank you. The patch applied fine, with no errors.

Is this the type of testing that would be helpful? I plan to construct a 
number of separate queries to test more nuanced edge cases. This test 
simply compares the output of 4 separate sub-queries that should provide 
the same results.

SELECT
   CASE WHEN jop = jp_expr AND jop = jval AND jop = jval_path
     THEN 'pass'
     ELSE 'fail'
   END
FROM
   (
     -- jsonb operator
     SELECT count(*)
     FROM testjsonb
     WHERE j->>'abstract' LIKE 'A%'
   ) as jop,
   (
     -- jsonpath expression
     SELECT count(*)
     FROM testjsonb
     WHERE j @? '$.abstract ? (@ starts with "A")'
   ) as jp_expr,
   (
     -- json_value()
     SELECT count(*)
     FROM testjsonb
     WHERE JSON_VAlUE(j, 'lax $.abstract') LIKE 'A%'
   ) as jval,
   (
     -- json_value(jsonpath)
     SELECT count(*)
     FROM testjsonb
     WHERE JSON_VALUE(j, 'lax $.abstract ? (@ starts with "A")') IS NOT NULL
   ) as jval_path;


If I'm completely off base for how testing is normally conducted, please 
let me know.

Thanks,
Andrew Alsup

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. JSON_TABLE: Add support for NESTED paths and columns

  2. Add basic JSON_TABLE() functionality

  3. Add SQL/JSON query functions

  4. Add soft error handling to some expression nodes

  5. Adjust populate_record_field() to handle errors softly

  6. Refactor code used by jsonpath executor to fetch variables

  7. Add more SQL/JSON constructor functions

  8. SQL/JSON: support the IS JSON predicate

  9. SQL/JSON: add standard JSON constructor functions

  10. Improve readability of SQL/JSON documentation.

  11. Documentation for SQL/JSON features

  12. RETURNING clause for JSON() and JSON_SCALAR()

  13. SQL JSON functions

  14. SQL/JSON query functions

  15. IS JSON predicate

  16. SQL/JSON constructors

  17. Common SQL/JSON clauses

  18. Doc: remove obsolete entries in table of BRIN strategy numbers.

  19. Doc: standardize markup a bit more.

  20. Make pg_regress.c unset PGDATABASE during make installcheck.

  21. Fix handling of GENERATED columns in CREATE TABLE LIKE INCLUDING DEFAULTS.