Re: [HACKERS] proposal: schema variables

Pavel Stehule <pavel.stehule@gmail.com>

From: Pavel Stehule <pavel.stehule@gmail.com>

To: Dean Rasheed <dean.a.rasheed@gmail.com>

Cc: Fabien COELHO <coelho@cri.ensmp.fr>, Gilles Darold <gilles.darold@dalibo.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>

Date: 2018-09-17T19:46:01Z

Lists: pgsql-hackers, pgsql-performance

Commits

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

Move WAL sequence code into its own file
- a87987cafca6 19 (unreleased) cited
Add ExplainState argument to pg_plan_query() and planner().
- c83ac02ec730 19 (unreleased) cited
Don't include access/htup_details.h in executor/tuptable.h
- 1a8b5b11e48a 19 (unreleased) cited
Refactor to avoid code duplication in transformPLAssignStmt.
- b0fb2c6aa5a4 19 (unreleased) cited
Avoid including commands/dbcommands.h in so many places
- 325fc0ab14d1 19 (unreleased) cited
Restrict psql meta-commands in plain-text dumps.
- 71ea0d679543 19 (unreleased) cited
Split func.sgml into more manageable pieces
- 4e23c9ef65ac 19 (unreleased) cited
Fix squashing algorithm for query texts
- 0f65f3eec478 18.0 cited
EXPLAIN: Always use two fractional digits for row counts.
- 95dbd827f2ed 18.0 cited
Preliminary refactoring of plpgsql expression construction.
- a654af21ae52 18.0 cited
plpgsql: pure parser and reentrant scanner
- 7b27f5fd36cb 18.0 cited
Add some sanity checks in executor for query ID reporting
- 24f520594809 18.0 cited
Fix misleading error message context
- 4af123ad45bd 18.0 cited
Add macros for looping through a List without a ListCell.
- 14dd0f27d7cd 17.0 cited

Attachments

schema-variables-20180917-01.patch.gz (application/gzip) patch

so 15. 9. 2018 v 18:06 odesílatel Pavel Stehule <pavel.stehule@gmail.com>
napsal:

>
>
>
>
>> The code is more cleaner now, there are more tests, and documentation is
>> mostly complete. I am sorry - my English is not good.
>> New features:
>>
>> o ON COMMIT DROP and ON TRANSACTION END RESET -- remove temp variable on
>> commit, reset variable on transaction end (commit, rollback)
>> o LET var = DEFAULT -- reset specified variable
>>
>>
> fix some forgotten warnings and dependency issue
> few more tests
>
>
new update:

o support NOT NULL check
o implementation limited transaction variables - these variables doesn't
respects subtransactions(this is much more complex), drop variable drops
content although the drop can be reverted (maybe this limit will be
removed).

CREATE TRANSACTION VARIABLE fx AS int;

LET fx = 10;
BEGIN
  LET fx = 20;
ROLLBACK;

SELECT fx;

Regards

Pavel


> Regards
>
> Pavel
>
>
>> Regards
>>
>> Pavel
>>
>>
>>> Regards,
>>> Dean
>>>
>>