Harmonize merge key columns before a safe merge

Internal helper used by safe_merge().

Usage

HarmonizeMergeKeys(
  df_before,
  df_add,
  by,
  key_parser = NULL,
  stop_on_failed_numeric = TRUE,
  n_examples = 5
)

Value

A list with elements left and right (the input data frames with harmonized key columns) and report (a data frame describing the harmonization applied to each key).