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The yy part is the last two digits of the current year, and the nnnnn is a padded 5 digit counter. For example, a firm might like to label all their credit memos with a sequence defined as “CMyy-nnnnn”. ![]() Complex SequencesĮven though sequence generation is typically a simple counting machine, there are times when it is nice to inject other types of behavior. While this project doesn’t currently have commissioning built-in, it could be a good place to start or to borrow ideas. “Commissioning” is a good term to explain the process of assigning these unique ranges to client nodes. Uniqueness might come from a prefix, or it could come from isolated numeric ranges. It is very reasonable to assign distinct pools of numbers to each location or off-line device. Again UUIDs making syncing much more sane, but they cause problems for humans. Serial numbers can be a real chore when synchronizing and merging data from multiple sites. When a table has both a UUID based primary key and a human readable field, the recommendation is that relationships and other programming functions would almost always utilize the UUID based primary key. Many tables work just fine with only a machine readable UUID. FILEMAKER PRO SERIAL NUMBER GENERATOREven though using a sequence generator script is a little slower than using schema based serial numbers, you probably don’t need them on most of your tables. Almost every database solution needs to present some sort of human readable record identifiers: Customer Account#, Invoice #, Asset Control #, etc. While computers seem to be keen on long hexadecimal strings, end users typically are not. When a table has no serial numbers, you can be much more aggressive with live development. Using UUIDs is a great way to avoid this lock. FILEMAKER PRO SERIAL NUMBER SERIAL NUMBERSThis is perfectly sensible, because otherwise you could find yourself with overlapping serial numbers for different records. Once a table level lock is acquired, no serial numbers can be issued until the table definition is saved. The most common and avoidable problem has to do with serial numbers. However, certain operations defining database schema can cause locks.
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