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ABL Reference
Handle Attributes and Methods Reference : MERGE-BY-FIELD attribute
 

MERGE-BY-FIELD attribute

Specifies whether the AVM merges changes on a field-by-field basis when saving changes from a ProDataSet temp-table buffer to the associated data source using the SAVE-ROW-CHANGES( ) method. The default value is TRUE.
Note: Merging a large number of changes from a ProDataSet object to the data source on a field-by-field basis is slower than saving changes buffer-by-buffer.
Data type: LOGICAL
Access: Readable/Writeable
Applies to: Data-source object handle
If TRUE, the AVM performs a field-to-field comparison to identify data conflicts. In this case, a data conflict exists when the same field in the ProDataSet buffer and its associated data source buffer has changed. A data conflict would not exist if a different field had changed in either buffer.
If FALSE, the AVM performs a buffer-to-buffer comparison to identify data conflicts. In this case, a data conflict exists when any field in the data source buffer has changed.