paimon-flink/paimon-flink-common/src/main/java/org/apache/paimon/flink/action/cdc/kafka/KafkaSyncDatabaseAction.java [169:185]:
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    private void validateCaseInsensitive() {
        checkArgument(
                database.equals(database.toLowerCase()),
                String.format(
                        "Database name [%s] cannot contain upper case in case-insensitive catalog.",
                        database));
        checkArgument(
                tablePrefix.equals(tablePrefix.toLowerCase()),
                String.format(
                        "Table prefix [%s] cannot contain upper case in case-insensitive catalog.",
                        tablePrefix));
        checkArgument(
                tableSuffix.equals(tableSuffix.toLowerCase()),
                String.format(
                        "Table suffix [%s] cannot contain upper case in case-insensitive catalog.",
                        tableSuffix));
    }
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paimon-flink/paimon-flink-common/src/main/java/org/apache/paimon/flink/action/cdc/mysql/MySqlSyncDatabaseAction.java [271:287]:
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    private void validateCaseInsensitive() {
        checkArgument(
                database.equals(database.toLowerCase()),
                String.format(
                        "Database name [%s] cannot contain upper case in case-insensitive catalog.",
                        database));
        checkArgument(
                tablePrefix.equals(tablePrefix.toLowerCase()),
                String.format(
                        "Table prefix [%s] cannot contain upper case in case-insensitive catalog.",
                        tablePrefix));
        checkArgument(
                tableSuffix.equals(tableSuffix.toLowerCase()),
                String.format(
                        "Table suffix [%s] cannot contain upper case in case-insensitive catalog.",
                        tableSuffix));
    }
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