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Displaying posts with tag: utf8 horror stories (reset)
utf8 data on latin1 tables: converting to utf8 without downtime or double encoding

Here’s a problem some or most of us have encountered. You have a latin1 table defined like below, and your application is storing utf8 data to the column on a latin1 connection. Obviously, double encoding occurs. Now your development team decided to use utf8 everywhere, but during the process you can only have as little to no downtime while keeping your stored data valid.

  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `c` text,
  PRIMARY KEY (`id`)
master> SET NAMES latin1;
master> INSERT INTO t (c) VALUES ('¡Celebración!');
master> SELECT id, c, HEX(c) FROM t;
| id | c               | HEX(c)                         |
|  3 | ¡Celebración!   | C2A143656C656272616369C3B36E21 |
1 row in set (0.00 sec)
master> …
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