Its compatibility range includes MySQL Server 3.21 or above, Drizzle, OurDelta, Percona Server and MariaDB.Īside from basic database administration functions such as data entry, table editing and creation or user management, it comes with importing and exporting capabilities, an integrated report generator, batch job scheduling, SSH and HTTP tunnel support, data and structure backup and synchronization tools and much more. While it is mainly intended for professional users, the applications is intuitive enough to help users who are new to MySQL or MariaDB to get accustomed with it from the first interaction. It sports a comprehensive data editor, SQL processing capabilities and data modeling and manipulation tools, enabling you to connect to multiple local or remote MySQL databases simultaneously. However, you should be aware of the trade-offs in terms of Unicode support.Navicat for MySQL aims to provide you with a database administration platform comprising a rich feature set that can meet the requirements of most demanding users. This may help you work around index length limitations, especially with older versions of MySQL. Index length limitations: The utf8 character set uses less storage space (up to 3 bytes per character) compared to utf8mb4 (up to 4 bytes per character).These characters will be replaced with the Unicode replacement character (U+FFFD) during the conversion process. Data loss or corruption: If your existing data contains characters outside of the BMP, converting the character set from utf8mb4 to utf8 may result in data loss or corruption.If you need to store these supplementary characters in your database, you should use utf8mb4. In contrast, utf8mb4 supports the full range of Unicode characters, including supplementary characters (code points U+10000 to U+10FFFF), such as emojis and certain rare symbols or scripts. Limited Unicode support: The utf8 character set in MySQL only supports a limited range of Unicode characters, specifically the Basic Multilingual Plane (BMP), which includes characters from the Unicode code points U+0000 to U+FFFF.Limitations of UTF8 Character Set:Ĭhanging the character set from utf8mb4 to utf8 in MySQL is not inherently bad, but it may have some implications that you should consider before making the change: Hope this is solution helped you to resolve “ Unknown collation: ‘utf8mb4_0900_ai_ci’” issue. after the above changes, the database was successfully restored! sed -i 's/utf8mb4_0900_ai_ci/utf8_general_ci/g' backup.sql sed -i 's/CHARSET=utf8mb4/CHARSET=utf8/g' backup.sql The Linux system users can use the sed command to replace text in files directly. Here we are changing the CHARSET to utf8, that is the older version and have limitation, Read the implications at the end of this article before making the changes in database. With: ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_general_ci.Replace the below string: ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci.Edit the database backup file in text editor and replace “ utf8mb4_0900_ai_ci” with “ utf8mb4_general_ci” and “ CHARSET=utf8mb4” with “ CHARSET=utf8“. Then we do a little tweak in the backup file to resolve this. So we got that the destination server doesn’t contain the required database collation. See the error screenshot during database restoration.Īfter a little investigation, I found that the MySQL server running on the destination is an older version than the source.
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