how do i handle concurrent inserts in mysql table and fetch the correct insert id

Question

I am using adodb for PHP library.

For fetching the id at which the record is inserted I use this function

\"$db->Insert_ID()\"

I want to know if t

Answer 1

I want to know if there are multiple and simultaneous inserts into the database table, will this method return me the correct inserted id for each record inserted ?

It will return only the most recently inserted id.
In order to get ids for multiple inserts, you will have to call INSERT_ID() after each statement is executed. IE:

INSERT INTO TABLE ....
INSERT_ID()

INSERT INTO TABLE ....
INSERT_ID()

...to get the id value for each insert. If you ran:

INSERT INTO TABLE ....
INSERT INTO TABLE ....
INSERT_ID()

...will only return the id for the last insert statement.

Is this approach safe enough or am I missing something.

It's safer than using SELECT MAX(id) FROM TABLE, which risks returning a value inserted by someone else among other things relating to isolation levels.