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When using a ZQuery with CachedUpdates = True and executing ApplyUpdates followed by CommitUpdates, the record's UpdateStatus is set to usDeleted, which generates an Error when trying to Edit the Record.

ZConnection properties are AutoCommit = True and TransactionIsolation = tiReadCommited. Zeos version 7.1.4 and Firebird Datasbase.

Example:

qryTest.Open;
qryTest.Append;
// set field values
qryTest.Post;
qryTest.ApplyUpdates;
qryTest.CommitUpdates; // qryTest.UpdateStatus = usDeleted
qryTest.Edit;
//set field values
qryTest.Post; //Exception 'Cannot update a deleted row'

It seems to me that the error is caused by TZAbstractDataset.CommitUpdates calling CachedResultSet.CancelUpdates, which executes this code:

if CurrentRow.UpdateType = utInserted then
InitialRow.UpdateType := utDeleted;

Is this intended? Shouldn't CommitUpdates call DisposeCachedUpdates?

Zeos 7.2 should have the same issue, although I didn't test it, only looked at the source code.

Thanks.

Hello bsoft,

could you try to build a small test case? Just a database script and a small Delphi or Lazarus project? That helps in tracking things down.
With best regards,

Jan

The same thing I reported in SVN tickets

marsupilami wrote:Hello bsoft,

could you try to build a small test case? Just a database script and a small Delphi or Lazarus project? That helps in tracking things down.
With best regards,

Jan

Here you go.

Thanks