Re: stored procedure variable names

On 02/19/2015 04:57 PM, inspector morse wrote:

In all other DBMS, the variable names have a distinctive character to
differentiate between variables and column names:

Example:
SQL Server uses @
MySql uses ?
Oracle uses :
Firebirdsql uses :

It makes it easier to write and manage queries especially in stored
procedures.

Just compare the below:
create stored procedure get_user_for_editing(user_id int, out username
varchar)
begin
    select username into @username from users where user_id = @user_id;
end;

to this mess:

create stored procedure get_user_for_editing(user_id int, out username
varchar)
begin
    select u.username into get_user_for_editing.username from users u
where get_user_for_editing.user_id = get_user_for_editing.user_id;
end;

First Postgres does not have stored procedures, but user defined functions, so the above is a no-op right from the start.

Second I have no idea where you are pulling get_user_for_editing.* from?

Third, which of the Postgres procedural languages are you having an issue with?

Prefixing the variables (ex: p_user_id) makes the application code
harder to write as we have a lot of dynamic code that is expecting
"user_id" instead of "p_user_id".

Is there any plan to add a character to differentiate between variables?

In what procedural language?


--
Adrian Klaver
adrian.klaver@aklaver.com