Class: TMMUpdater
property FailedRowPK : TArray<TPair<string,string>>; { read-only }PK col=val pairs of the row that caused a server-side
insert_rows failure.
Contains PK columns when the target table has a PRIMARY KEY; otherwise
all non-blob columns.
Empty on network failures.
Cleared at Execute entry; valid after Execute
returns False.
Use FormatFailedRowPK
to format as 'Col1=Val1, Col2=Val2'.