About unidac 3.003 of " DMLRefresh "

[wjzws]

Hello:


For the property "DMLRefresh" usage, I am not too clear, in the end what that means.

"Use the DMLRefresh property to refresh record by RETURNING clause when insert or update is performed.
The default value is False."


Be able to help me explain it in detail?



The best example of what the code can be used.



Thank you.

[Plash]

DMLRefresh can be used instead of RefreshOptions.roAfterInsert and roAfterUpdate. When DMLRefresh = True, TUniQuery generates an SQL statement like the following to insert record:

INSERT INTO Table1(A, B) VALUES(:A, :B)
RETURNING A, B

This statement inserts a record and returns back fields values. This is useful if the fields values are modified by a trigger, for autoincrement fields, and for fields with default values.

Not all DBMS support the RETURNIG clause. RETURNING is supported by Oracle, PostgreSQL (starting with 8.2 version), and Firebird (starting with 2.0 version).

There is no need in code example. You just set the DMLRefresh property in Object Inspector.

[tobias_cd]

There is no need in code example. You just set the DMLRefresh property in Object Inspector.

Plash,

the DMLRefresh property is not published for TUniTable. Can DMLRefresh still be used (setting it by code then) with TUniTable as you described?

Regards,
Tobias

[Plash]

We will publish this property for TUniTable in the next UniDAC build.

[wjzws]

thanks !