Re: Support plpgsql multi-range in conditional control - Mailing list pgsql-hackers

From Pavel Stehule
Subject Re: Support plpgsql multi-range in conditional control
Date
Msg-id CAFj8pRBQVLWG5bg9=8BV+NsE3osgMemGT1pU5ffHBa6BP_H8fA@mail.gmail.com
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In response to Support plpgsql multi-range in conditional control  ("2903807914@qq.com" <2903807914@qq.com>)
Responses Re: Support plpgsql multi-range in conditional control
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Hi


čt 19. 1. 2023 v 10:23 odesílatel 2903807914@qq.com <2903807914@qq.com> napsal:
Dear hackers, my good friend Hou Jiaxing and I have implemented a version of the code that supports multiple integer range conditions in the in condition control of the for loop statement in the plpgsql procedural language. A typical example is as follows:

postgres=# do $$
declare
    i int := 10;
begin
    for i in 1..10 by 3, reverse i+10..i+1 by 3 loop
       raise info '%', i;
    end loop;
end $$;
INFO: 1
INFO: 4
INFO: 7
INFO: 10
INFO: 20
INFO: 17
INFO: 14
INFO: 11
do
postgres=#

Hope to get your feedback, thank you!

I don't like it. The original design of ADA language is to be a safe and simple language. Proposed design is in 100% inversion.

What use case it should to support?

Regards

Pavel
 

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