character set UTF8mb4

MySQL's utf8 character table contains characters from the Basic Multililingial Plane, also known as BMP — it is a subset of UTF8 characters which lengths are from 1 to 3 bytes. 4-bytes characters are not included into this character table, and when one attempted to store such characters into a MySQL table, the Incorrect String Value error occurs.

MySQL's utf8mb4 character table is a superset of BMP and contains also 4-bytes characters. This character tables is supported since MySQL 5.5.3.

Author: bahusoid

.travis.yml

@@ -43,6 +43,6 @@ before_install:
 before_script:
   - if [[ "$DB" == "SqlServer2008" ]]; then docker run -e "ACCEPT_EULA=Y" -e "SA_PASSWORD=P@ssw0rd" -e "MSSQL_PID=Express" -p 1433:1433 -d --name sqlexpress microsoft/mssql-server-linux:latest; fi
   - if [[ "$DB" == "PostgreSQL" ]]; then psql -c "CREATE DATABASE nhibernate;" -U postgres; fi
-  - if [[ "$DB" == "MySQL" ]]; then mysql -e "CREATE DATABASE IF NOT EXISTS nhibernate character set UTF8 collate utf8_bin;"; fi
+  - if [[ "$DB" == "MySQL" ]]; then mysql -e "CREATE DATABASE IF NOT EXISTS nhibernate character set UTF8mb4 collate utf8mb4_bin;"; fi
 script:
   - pwsh -noprofile -command "& ./build.ps1 -TaskList Set-Configuration,Test -properties @{\"Database\" = \"$DB\";\"ConnectionString\"=\"$CONNECTION_STRING\"}"