Will deleting a PI Point referenced in a PI AF database cause any issues? Must the attribute that references the point be removed from the AF database before the tag is deleted?
Deleting a PI point that is used by a reference may cause performance issues if the attribute is used in an analysis.
Otherwise, it shouldn't cause an issue within AF/analysis service, but if the attribute is used in a display or spreadsheet, it may cause issues with the display or spreadsheet.
Often, when migrating an element from one environment to another, I have the attribute created with the correct tag, but the tag hasn't been created on target server yet. It doesn't cause any serious issues, mainly an annoyance.
Just be careful not to delete the wrong PI Point... Recovering PI Points is difficult, in some cases there may be some or complete data loss.
Thank you for the reminder. I always check carefully before deleting to insure I have selected the correct point(s). Once deleted, any history is un-recoverable. When asked to delete a point - I remind the requestor of this fact and get them to confirm they no longer need this history.
Retrieving data ...