FireDAC.Stan.Intf.TFDMergeDataMode

Delphi

TFDMergeDataMode = (dmNone, dmDataSet, dmDataAppend, dmDataMerge, dmDeltaSet,
dmDeltaAppend, dmDeltaMerge);

C++

enum DECLSPEC_DENUM TFDMergeDataMode : unsigned int { dmNone, dmDataSet, dmDataAppend, dmDataMerge, dmDeltaSet, dmDeltaAppend, dmDeltaMerge };

Type	Visibility	Source	Unit	Parent
enum	public	FireDAC.Stan.Intf.pas FireDAC.Stan.Intf.hpp	FireDAC.Stan.Intf	FireDAC.Stan.Intf

Description

Indicates how to merge the data of the specified dataset into this dataset.

This enumeration indicates how to merge the data of the specified dataset into this dataset. The following table lists the possible values:

Mode	Description	Commit Changes in this Dataset
dmNone	Do not merge the data.	-
dmDataSet	Clears this dataset and inserts records from the specified dataset instead.	Yes
dmDataAppend	Appends records from the specified dataset to this dataset.	Yes
dmDataMerge	Retrieves the primary keys for records from the specified dataset and tries to find their counterparts with the same primary key in this dataset. After this, do one of the following: Updates the records in this dataset with their counterparts from the specified dataset, if any. If a record in the specified dataset has no counterparts in this dataset, the record is appended to this dataset as a new record. Deletes the records for which counterparts are marked as deleted, if any.	Yes
dmDeltaSet	Clears the current dataset and inserts records from the specified dataset instead.	No
dmDeltaAppend	Appends records from the specified dataset to this dataset.	No
dmDeltaMerge	Retrieves the primary keys for records from the specified dataset and tries to find their counterparts with the same primary key in this dataset. After this, do one of the following: Updates the records in this dataset with their counterparts from the specified dataset, if any. If a record in the specified dataset has no counterparts in this dataset, the record is appended to this dataset as a new record. Deletes the records for which counterparts are marked as deleted, if any.	No