Create field from auto increment value on INSERT - php

Question

Is there a way to INSERT a row into a table which contains an AUTO_INCREMENT column, and use the resulting AUTO_INCREMENT value to construct another field in the same row, in a single query?
I know it can be done in two operations.
Our product uses a 16 character numeric account ID stored as CHAR(16). We like to store the account ID as a single field as it is referenced in many tables throughout our database(s), however it is made up of the following parts:
AccountType INT(4) UNSIGNED // never less than 1000
AccountNumber INT(10) UNSIGNED AUTO_INCREMENT PRIMARY
AccountSite INT(2) UNSIGNED
Which are concatenated in order to produce the 16 character accountID field. The AccountType value is never less than 1000.
I would like to be able to perform a single INSERT operation that produces the four fields within the same query, if possible.

Answer 1

I can show this with a stored procedure. You may in the end only want 1 or 2 columns in the table. But I am showing more (assuming a text user friendly string too). That part is trivial, to shrink it down in column count.
Schema:
drop table if exists tX4;
create table tX4
( AccountType INT(4) UNSIGNED not null, -- // never less than 1000
AccountNumber INT(10) AUTO_INCREMENT PRIMARY key,
AccountSite INT(2) UNSIGNED not null,
col4 varchar(50) not null,
weWantThis char(16) not null
);
-- truncate tX4; -- used for testing
Stored Procedure:
DROP PROCEDURE IF EXISTS ins_tX4;
DELIMITER $$
CREATE PROCEDURE ins_tX4
( p_AccountType int,
p_AccountSite int,
p_col4 varchar(50)
)
BEGIN
DECLARE theAI int;
DECLARE sConcatFix char(16);
START TRANSACTION;
insert tX4(AccountType,AccountSite,col4,weWantThis) values (p_AccountType,p_AccountSite,p_col4,'');
set theAI=last_insert_id();
set sConcatFix=concat( lpad(p_AccountType,4,'0'), lpad(theAi,10,'0'), lpad(p_AccountSite,2,'0') );
update tX4 set weWantThis=sConcatFix where AccountNumber=theAI;
COMMIT;
END$$
DELIMITER ;
Test:
call ins_tX4(1,2,'cat');
select * from tX4;
+-------------+---------------+-------------+------+------------------+
| AccountType | AccountNumber | AccountSite | col4 | weWantThis |
+-------------+---------------+-------------+------+------------------+
| 1 | 1 | 2 | cat | 0001000000000102 |
+-------------+---------------+-------------+------+------------------+
Visualized pieces:
0001 0000000001 02
Which is AccountType, the AI, AccountSite (widths 4,10,2) respectively.
call ins_tX4(8765,42,'Sunday');
select * from tX4;
+-------------+---------------+-------------+--------+------------------+
| AccountType | AccountNumber | AccountSite | col4 | weWantThis |
+-------------+---------------+-------------+--------+------------------+
| 1 | 1 | 2 | cat | 0001000000000102 |
| 8765 | 2 | 42 | Sunday | 8765000000000242 |
+-------------+---------------+-------------+--------+------------------+
Column weWantThis could be used as the target for an FK from other tables.
Manual page for LPAD() (Left Padding).
Edit
With an OUT parameter to send back the AI # assigned. Note that parameters are IN parameters by default.
Stored Procedure:
DROP PROCEDURE IF EXISTS ins_tX4;
DELIMITER $$
CREATE PROCEDURE ins_tX4
( p_AccountType int,
p_AccountSite int,
p_col4 varchar(50),
OUT AI_assigned int
)
BEGIN
DECLARE theAI int;
DECLARE sConcatFix char(16);
-- AI means database-assigned AUTO INCREMENT
set AI_assigned = -1; -- assume an Error condition
START TRANSACTION;
insert tX4(AccountType,AccountSite,col4,weWantThis) values (p_AccountType,p_AccountSite,p_col4,'');
set theAI=last_insert_id();
set sConcatFix=concat( lpad(p_AccountType,4,'0'), lpad(theAi,10,'0'), lpad(p_AccountSite,2,'0') );
update tX4 set weWantThis=sConcatFix where AccountNumber=theAI;
set AI_assigned = theAI; -- the OUT parameter is set to the AI value
COMMIT;
END$$
DELIMITER ;
Test from mysql environment:
set #var1 = -1;
call ins_tX4(22,33,'Monday',#var1);
select #var1;
-- 3
call ins_tX4(333,79,'Tuesday',#var1);
select #var1;
-- 4
Test from a PHP environment:
Because this question is tagged PHP, see an answer like the one here from user Matteo Tassinari.

Answer 2

This can be accomplished with a TRANSACTION.
START TRANSACTION;
INSERT INTO accounts (accountType, accountSite) VALUES(1000,10);
UPDATE accounts SET accountID = CONCAT(LPAD(accountType, 4, '0'), LPAD(accountNumber, 10, '0'), LPAD(accountSite, 2, '0')) WHERE accountNumber = LAST_INSERT_ID();
COMMIT;
Which could for example be executed in php as:
$mysqli = new mysqli(...);
$mysqli->begin_transaction();
$query = "INSERT INTO accounts (accountType, accountSite) VALUES(1000,10);"
$query .= "UPDATE accounts SET accountID = CONCAT(LPAD(accountType, 4, '0'), LPAD(accountNumber, 10, '0'), LPAD(accountSite, 2, '0')) WHERE accountNumber = LAST_INSERT_ID();"
$mysqli->query($query);
$mysqli->commit();