Dear brethren,

I am trying to find a Perl fix for a Mysql problem. We are trying to migrate from Mysql 4.0something to Mysql 5.1.

Our application has grown organically and is using a couple of thousands of statement of which some have the ugly form:

select * from table1 a, 
              table2 b left join table3 c on b.id = c.id
 where a.id = b.id

[download]
Statements like this are running with 4.0 smooth but cause errors with 5.1. The problem is caused by the mix of two join syntaxes: comma and "left join".
Since most of our statements are executed by a library function, we had the idea of identifying and fixing these statements on the fly.
The fix would be transforming the above statement to: 
select * from table1 a inner join
              table2 b left join table3 c on b.id = c.id
 where a.id = b.id

[download]
which is not causing problems.

Did somebody run already in the same problem and has a neat regexp to identify and fix?
Is there a enlightened brother who could give me a hint for a regexp, that does the job?

Humbly yours

In reply to Regexp for Mysql 5.1 join Problem by Ben Win Lue

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