I have a column in a table that contains the path for a file, along the lines of:
/here/here2/something.jpg
I need to change every row to map it to:
/here3/something.jpg
Is there an easy way to do this? Thanks!
2 Answers
You don't need regex for this. Simple string functions can do the trick. You could use a query like this:
update test set path=concat('/here3/',
substring(path, length('/here/here2/') + 1))
where path like '/here/here2/%';
Here is a little test case to prove it works:
mysql> create table test (path varchar(64));
Query OK, 0 rows affected (0.02 sec)
mysql> insert into test (path) values
-> ('/here/here2/something.jpg'),
-> ('/here/here2/something-else.jpg'),
-> ('/here/here2/yet-another-something.jpg');
Query OK, 3 rows affected (0.01 sec)
Records: 3 Duplicates: 0 Warnings: 0
mysql> select * from test;
+---------------------------------------+
| path |
+---------------------------------------+
| /here/here2/something.jpg |
| /here/here2/something-else.jpg |
| /here/here2/yet-another-something.jpg |
+---------------------------------------+
3 rows in set (0.00 sec)
mysql> update test set path=concat('/here3/',
-> substring(path, length('/here/here2/') + 1))
-> where path like '/here/here2/%';
Query OK, 3 rows affected (0.00 sec)
Rows matched: 3 Changed: 3 Warnings: 0
mysql> select * from test;
+----------------------------------+
| path |
+----------------------------------+
| /here3/something.jpg |
| /here3/something-else.jpg |
| /here3/yet-another-something.jpg |
+----------------------------------+
3 rows in set (0.00 sec)
Comments
First of all, are you familiar with using PHP? You could write a script to get all of the entries from the database, and then change them using preg_replace(). Then you could use mysql to update the database.
