Possible for child table to utilize auto-numbering of parent table instead?

[Bob Loblaw]

Hi - I am fairly new to ServiceNow, so bear with me....

I have created Table A which extends Table B. I have deselected the auto-number option on Table A in hopes of using Table B's auto-numbering system for records created in Table A.

Since Table A extends Table B, it would make sense to me that Table A can also use Table B's auto-numbering system as well. But I've been wrong before...

I've read over Auto Numbering for extensible table article but wasn't sure that had the answer I was looking for.

Is this possible and if so, how? Any tips would be appreciated - thanks!

[Bob Loblaw]

Hi - I went in to where you said, found the record, and deleted it. It still doesn't seem to be working, Table A is still creating it's own numbers upon record creation.

I even went into the Form Layout of the form of Table A and switched the field from "Number" to "Parent.Number" - now it comes up as blank.

[Chuck Tomasi]

You may be mixing up table extensions with reference fields. The field parent.Number is a referenced field from a related record (the parent record.) Table extensions are a different concept (incidents, problems, changes, etc are all extended from task.)

Table Extension - ServiceNow Wiki

[Bob Loblaw]

Thank you - I will look into that - much appreciated!

[Bob Loblaw]

Hi Chuck,

So, it looks like Table B's (the parent table) number field is from the Task Table (as you suggested above), when I look at the dictionary info for the number field for Table B it says this

        Dictionary Info: TableB.number

                                      Table task

                              Element number

                                        Type string

So it sound like this is what you suggested above. So is there a way I can use table extensions to make Table A have the same thing? Maybe something that looks like this?

        Dictionary Info: TableA.number

                                      Table task

                              Element number

                                        Type string

[Bob Loblaw]

Update: I was able to reach this point:

        Dictionary Info: TableA.number

                                      Table task

                              Element number

                                        Type string

but the number it still comes up is its own count, not a continuation of the running number of Table B (which also uses the task table). If I were to go to Table B and create a record, the number field would read something like "REC0003456". I would like it where when I create a new record in Table A, the number field would read "REC0003457" instead of "1180".