Creating tree_changes table

[diazrenata]

• FIADB definitely has some "PREV_*" columns. These might be more correct to use?
• Alternatively we're looking at joining by = c("CN = PREV_TRE_CN") and then comparing INVYR and any other cols of interest.
  • TBD how fast this is using, e.g. left_join within arrow. I try to avoid big left_joins in dplyr, but arrow might make this possible.
• What cols/changes/variables are wanted?
  • "CURRENT" and "PREV"
  • Then any computations off of CURRENT comparison to PREV?

[diazrenata]

Don't do this.