Re: psql variables in the DO command

[Pavel Luzanov]

On 05.03.2018 16:56, Pavel Stehule wrote:


        I can't use psql variable in the DO command. Is it
        intentional behavior?


    yes. psql variables living on client side, and are not accessible
    from server side . DO command is executed on server side.

    But SELECT command also executed on a server side ))
    I thought that the command is sent to the server after variable's
    replacement.


The psql variables are injected into SQL string before execution 
(before SQL string is sent to server). But this injection is disabled 
inside strings - and body of DO command is passed as string.
Yes, now I understand this. But at first glance this is not an obvious 
behavior.

-----
Pavel Luzanov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company