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Set LONG data type using a Prepared Statement
alter table table_name split partition default_partition values (' +
id + ') into (  partition " + partitionName + ", partition
default_partition) update indexes

ORA-14308: partition bound element must be one of: string, datetime or interval literal, number, or NULL

try {
        id = Long.valueOf(unsafeId);
        //do more validations here
    } catch (NumberFormatException e) {
        throw new RuntimeException("Not a valid input.");
    }