SQL RegEx Create Split: Include SET - mysql

Question

I'm writing a regex pattern to split MySQL CREATE statements into column definition arrays. So far, it works great for everything aside from SET columns. Here's the process:
$lines = explode("\n", $create_sql);
foreach ($lines as $line) {
$line = str_replace('NOT NULL', 'NOT_NULL', $line);
$pattern = '/`(.*)`[\s]*([^\s]*)[\s]*(NOT_NULL|NULL)[\s]*(.*),/';
$search = preg_match($pattern, $line, $matches);
if ($search !== false && count($matches) === 5) {
$columns[$matches[1]] = array(
'type' => $matches[2],
'null' => $matches[3] === 'NULL',
'extra' => $matches[4],
);
}
}
This process works great on a column with a definition like this:
`id` INT(11) NOT NULL AUTO_INCREMENT,
...but fails on SET columns. How can I best accommodate for the extra quotes and parentheses in this line?
`platform` SET('iOS', 'Android') NULL DEFAULT NULL,
To summarize, I need to integrate a pattern to match SET('one', 'two', n) in a string.

Answer 1

First just let slightly modify your pattern expression, first for readability (\s* instead of [\s]*), then to ensure working even with lowercase statements :
$pattern = '/`(.*)`\s*([^\s]*)\s*(NOT_NULL|NULL)\s*(.*),/i';
Then, to answer your question, prepare the pattern depending on a SET is present or not in the line:
$sub_pattern = stripos($line, ' SET(') ?
'SET\([^\)]*\)\s*[^\s]*'
: '[^\s]*';
$pattern = '/`(.*)`\s*(' . $sub_pattern . ')\s*(NOT_NULL|NULL)\s*(.*),/i';
Note that, however, this code is not secured against syntax errors in the source lines.

Answer 2

// Input: $sql
$match = '(
([^(),]+?| # no parens, or contains ():
[^(),]+?
\( [^)]+? \) # (123), (enum...), etc
[^(),]*?
) \s*(,\s*|$) # separator or terminator
)';
preg_match('/(CREATE\s+TABLE.*?\()(.*)(\)[^()]*(;|$))/si', $sql, $m);
list($x, $pre, $list, $post, $z) = $m;
$list = trim($list);
$list = preg_replace('/\s+/', ' ', $list);
$list = preg_replace("/$match/sx", "$1
", $list);
$list = trim($list);
// Output:
echo "<pre>
$pre
$list
$post\n</pre>\n";
Notes:
Certain quoted strings will fail to parse correctly.
I think all cases of parentheses work ok.
You will still need to parse each element in $list[], which should be one per column.