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Isnt that controlled by the collation ?

You can use REGEXP instead of LIKE. Exposed: https://github.com/JetBrains/Exposed/blob/master/exposed-core/src/main/kotlin/org/jetbrains/exposed/sql/SQLExpressionBuilder.kt#L298 PostgreSQL: https://www.postgresql.org/docs/current/functions-matching.html#FUNCTIONS-POSIX-TABLE