START SYNCHRONIZATION DELETE

UltraLite databases automatically log changes made to rows that need to be synchronized. UltraLite uploads these changes to the consolidated database during the next synchronization. This statement allows you to restart logging of deleted rows, previously stopped by a STOP SYNCHRONIZATION DELETE statement.

When a STOP SYNCHRONIZATION DELETE statement is executed, none of the delete operations executed on that connection are synchronized. The effect continues until a START SYNCHRONIZATION DELETE statement is executed.

Do not use START SYNCHRONIZATION DELETE if your application does not synchronize data.

The way in which UltraLite traces row states is unique. Be sure you understand the implication of deletes and row states.

• UltraLite database row state management
• STOP SYNCHRONIZATION DELETE statement [UltraLite]

The following sequence of SQL statements illustrates how to use START SYNCHRONIZATION DELETE and STOP SYNCHRONIZATION DELETE.

STOP SYNCHRONIZATION DELETE;
DELETE FROM PROPOSAL
  WHERE last_modified < months( CURRENT TIMESTAMP, -1 );
START SYNCHRONIZATION DELETE;
COMMIT;