Question

I’m using a legacy PHP framework which automatically assembles queries for me. By some reason, it is assembling a query like this:

SELECT s.status,c.client FROM client C LEFT JOIN status S ON C.id_status=S.id_status'

This isn’t a problem on my MacOS X workstation. But when I test it on my production server mysql raises the following error:

#1054 - Unknown column 's.status' in 'field list' 

It is definitively a case issue on s.status. If I manually runs the query changing s,c for S,C , it works perfectly.

A quick look on google didn’t solved the issue. Any ideas?

Answer 1

Well, it’s said in the documentation:

By default, table aliases are case sensitive on Unix, but not so on
Windows or Mac OS X. The following statement would not work on Unix,
because it refers to the alias both as a and as A:

mysql> SELECT col_name FROM tbl_name AS a
    -> WHERE a.col_name = 1 OR A.col_name = 2;

There are also some solutions given in this section of the documentation as well. For example, you can set lower_case_table_names to 1 on all platforms to force names to be converted to lowercase – but you have to rename all your tables to lowercase as well in that case.