Re: Virtual generated columns

Marcos Pegoraro <marcos@f10.com.br>

From: Marcos Pegoraro <marcos@f10.com.br>

To: Vik Fearing <vik@postgresfriends.org>

Cc: Peter Eisentraut <peter@eisentraut.org>, pgsql-hackers <pgsql-hackers@postgresql.org>, jian he <jian.universality@gmail.com>, Dean Rasheed <dean.a.rasheed@gmail.com>

Date: 2025-01-08T19:29:51Z

Lists: pgsql-hackers

Commits

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

Expand virtual generated columns for ALTER COLUMN TYPE
- 5069fef1cfae 18.0 landed
Eliminate code duplication in replace_rte_variables callbacks
- 363a6e8c6fcf 18.0 landed
Expand virtual generated columns in the planner
- 1e4351af329f 18.0 landed
Virtual generated columns
- 83ea6c54025b 18.0 landed
Additional tests for stored generated columns
- 41084409f635 18.0 landed
Improve generated_stored test
- 44b61efb7928 18.0 landed
- 86749ea3b766 18.0 landed
Fix handling of CREATE DOMAIN with GENERATED constraint syntax
- 84a67725cd11 18.0 landed
Add pg_constraint rows for not-null constraints
- 14e87ffa5c54 18.0 cited
Put generated_stored test objects in a schema
- 894be11adfa6 18.0 landed
Rename regress test generated to generated_stored
- b9ed4969250d 18.0 landed
Small code simplification
- 7ff9afbbd1df 18.0 landed
Remove useless code
- e26d313bad92 18.0 landed
Remove useless initializations
- da2aeba8f533 18.0 landed
doc: Clarify that pg_attrdef also stores generation expressions
- da486d360103 18.0 landed
Clean out column-level pg_init_privs entries when dropping tables.
- 76618097a6c0 17.0 cited
Re-implement the ereport() macro using __VA_ARGS__.
- e3a87b4991cc 13.0 cited

Em qua., 8 de jan. de 2025 às 16:23, Vik Fearing <vik@postgresfriends.org>
escreveu:

> This is lying to the planner, and you get to enjoy whatever breaks
> because of it.  A function that accesses external data is not immutable;
> it is stable at best.
>

I understand that, but it's not documented, so users can think that way is
fine. So, it would be good to explain why this way could break this or that.

regards
Marcos