Otherwise, MySQL must reserve three bytes for each character in a CHAR CHARACTER SET utf8 column because that is the maximum possible character length. Since his stance is not completely out to lunch, just out-dated, respect his position when discussing this matter (and you need to remember to discuss, not argue), and try to work through concerns he has with regards to UTF-8. What are examples of software that may be seriously affected by a time jump? Once I set the character encoding properly, queries against the database should work better and I shouldnt have to worry about these types of issues in the future. Create Database To Fit Data vs Make Data Fit The Database. Some Chinese characters and some Emoji, need 4 bytes, so utf8mb4 is a better choice for them. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? Fixing the problem was a challenge, so I wanted to share some of the knowledge I gained in case anyone else finds similar issues on their own websites. How do I import an SQL file using the command line in MySQL? Since the data is more than 1000 bytes (let's assume 30k bytes), there will be a hash collision as the output is only 64 bytes. Personally I use case insensitive collations more often (for user supplied data at least). then I though maybe I should get a list of all such values that are not valid as you suggested. You can specify a default character set per MySQL server, database, or table. For example, a page that previously had the text Graffiti by Dolk and Pbel was now reading Graffiti by Dolk and Pbel. Storage space increase, however, will be different depending on the language your data is in. Or you started with 4.1 (or later) and "latin1 / latin1_swedish_ci" and failed to notice that you were asking for trouble. Could you explain more? However MySQL is different form Oracle Seor, in CHARACTER SET latin1, take 5 bytes (plus length). Unfortunately this requires taking the database down as tables are dropped and re-created, and this can be a bit time-consuming. Hi @Guru! breakdown of the storage used for different categories of utf8mb3 or My guess is it should be similar to the time it takes to duplicate (or export) a table. mysql> SELECT MyID, MyColumn, CONVERT(MyColumn USING utf8) Weblatin1_swedish_ciUTF-8fuballfuball. Character Set, MySQL 5.7 latin1, MySQL 8 utf8mb4 . Utilizacin de la Esfinge motor de bsqueda, con PHP. Thai) won't need specific collations and will just work with the default "root" collation. The only argument that I've heard for sticking with Latin-1 is that allowing non-printable UTF-8 characters can mess up text/full-text searches in MySQL. Finally I believe only defunct version 6.0alpha (ditched when Sun bought MySQL) could accomodate unicode characters beyound the BMP (Basic Multilingual Plan). Its just much easier to have utf-8/unicode all the way from front end to back end than to deal with the many and various issues that result from utf-8-> latin-1-> utf-8. Making statements based on opinion; back them up with references or personal experience. You can also specify the character set youre using for client connections (via the command line, or through an API like PHPs mysql functions). There is a trick to get around this: first convert the column character set to the binary character set, then from binary to utf8. . are patent descriptions/images in public domain? Can patents be featured/explained in a youtube video i.e. Web. utf-8 show variables like'character_set_%'; 1 mysql> SHOW VARIABLES LIKE 'character_set_%'; Seeing these strange characters sequences everywhere scared me enough to look into the problem a bit more. My websites visitors saw proper UTF-8 characters on the website even though the MySQL column was latin1. Web1. : mysql, sql, query-optimization. Yes, text is really complicated, and Unicode won't hide that from you. Or will I be able to get away with using latin1? I assume that your scripts would work that way also however do you see any reasons why such a conversion would create new challenges? Each character set has a default collation.For example, the default collations for utf8mb4 and latin1 are The As long as I didnt edit the strange characters, they displayed correctly when PHP spit them back out as HTML, so I hadnt though much of it until now. Web2. latin1, AKA ISO 8859-1 is the default character set in MySQL 5.0 Webjava,mysql,UTF8UTF-8ideaUTF-8JAVAutf-8web.xmlutf-8