Horton

Re: [HACKERS] [PATCH] Generic type subscripting

Dmitry Dolgov <9erthalion6@gmail.com>

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From: Dmitry Dolgov <9erthalion6@gmail.com>
To: Pavel Stehule <pavel.stehule@gmail.com>
Cc: David Steele <david@pgmasters.net>, Nikita Glukhov <n.gluhov@postgrespro.ru>, Alvaro Herrera <alvherre@2ndquadrant.com>, David Fetter <david@fetter.org>, Thomas Munro <thomas.munro@gmail.com>, Thomas Munro <thomas.munro@enterprisedb.com>, Oleksandr Shulgin <oleksandr.shulgin@zalando.de>, Tom Lane <tgl@sss.pgh.pa.us>, Robert Haas <robertmhaas@gmail.com>, Andres Freund <andres@anarazel.de>, Michael Paquier <michael.paquier@gmail.com>, Oleg Bartunov <obartunov@gmail.com>, Peter Eisentraut <peter.eisentraut@2ndquadrant.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2020-03-17T10:26:27Z
Lists: pgsql-hackers 
> On Tue, Mar 17, 2020 at 11:03:22AM +0100, Pavel Stehule wrote:
>
> here is a attached fixed first patch
>
> v30-0001-Base-implementation-of-subscripting-mechanism.patch
>
> My objectives are fixed. I checked this patch and
>
> There are not problems with build (code, documentation)
> All tests passed
> The code is well documented
>
> I like the functionality introduced by this patch. It opens a door for easy
> work with json, jsonb, xml, ... and lot of other types with array access
> syntax.
>
> This is first step, but necessary steps. A write operations are not
> supported by PL/pgSQL. But plpgsql developers still has some benefits. It
> is working for read operations (in plpgsql).
>
> I'll mark this patch as ready for commiters
>
> Thank you for your work.

Thanks a lot, Pavel!

Commits

  1. Throw error when assigning jsonb scalar instead of a composite object

  2. Filling array gaps during jsonb subscripting

  3. Implementation of subscripting for jsonb

  4. Allow ALTER TYPE to update an existing type's typsubscript value.

  5. Allow subscripting of hstore values.

  6. Support subscripting of arbitrary types, not only arrays.

  7. jit: Reference function pointer types via llvmjit_types.c.

  8. Teach contain_leaked_vars that assignment SubscriptingRefs are leaky.

  9. jit: Correct parameter type for generated expression evaluation functions.

  10. Renaming for new subscripting mechanism

  11. Fix assertion failure for SSL connections.

  12. Teach eval_const_expressions() to handle some more cases.