Project: talenddataquality
Issue TDQ-5980: Additional tMatchGroup options for NULL values
Null values can cause false positive matches where both fields are null, create false negatives when a good match when one field is NULL, etc. I'd like to see some control given to the user, Advanced options, that would be usefull for tMatchGroup (and tRecordMatching) - NULL only matches NULL i.e. NULL == NULL therefore this fields scores 1.0 - NULL matches everything i.e. CHAPMAN == NULL therefore this fields scores 1.0 (or better (possibly) the weight for this field becomes 0, i.e., this column is not considered any further and only the remaining fields are compared) - NULL never matches anything i.e CHAPMAN != NULL, NULL != NULL therefore these fields score 0.0
Story points: 5