Regular expression to find all table names in a query

Question

I am not that hot at regular expressions and it has made my little mind melt some what.

I am trying to find all the tables names in a query. So say I have the query

Answer 1

In PHP, I use this function, it returns an array with the table names used in a sql statement:

function sql_query_get_tables($statement){
    preg_match_all("/(from|into|update|join) [\\'\\´]?([a-zA-Z0-9_-]+)[\\'\\´]?/i",
            $statement, $matches);
    if(!empty($matches)){
        return array_unique($matches[2]);
    }else return array();
}

Notice that it does not work with a,b joins or schema.tablename naming

I hope it works for you