MobiLink Synchronization Reference
  SQL Statements

START SYNCHRONIZATION DELETE statement [MobiLink]

Description 

Use this statement to restart logging of deletes for MobiLink synchronization.

Syntax 

START SYNCHRONIZATION DELETE

Usage 

Ordinarily, Adaptive Server Anywhere automatically logs any changes made to tables or columns that are part of a synchronization template and uploads these changes to the consolidated database during the next synchronization. You can temporarily suspend automatic logging of delete operations using the STOP SYNCHRONIZATION DELETE statement. The START SYNCHRONIZATION DELETE statement allows you to restart the automatic logging.

When a STOP SYNCHRONIZATION DELETE statement is executed, none of the delete operations executed on that connection will be synchronized. The effect continues until a START SYNCHRONIZATION DELETE statement is executed. The effects do not nest; that is, subsequent execution of stop synchronization delete after the first will have no additional effect. A single START SYNCHRONIZATION DELETE statement restarts the logging, regardless of the number of STOP SYNCHRONIZATION DELETE statements preceding it.

Permissions 

Must have DBA authority.

Side effects 

None.

See also 

STOP SYNCHRONIZATION DELETE statement [MobiLink]

StartSynchronizationDelete method

Standards and compatibility 

• SQL/92    Vendor extension.

• SQL/99    Vendor extension.

• Sybase    Not applicable.

Example 

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

-- Prevent deletes from being sent
-- to the consolidated database
STOP SYNCHRONIZATION DELETE;

-- Remove all records older than 1 month
-- from the remote database,
-- NOT the consolidated database
DELETE FROM PROPOSAL
WHERE last_modified < months( CURRENT TIMESTAMP, -1 )

-- Re-enable all deletes to be sent
-- to the consolidated database
-- DO NOT FORGET to start this
START SYNCHRONIZATION DELETE;

-- Commit the entire operation,
-- otherwise rollback everything
-- including the stopping of the deletes
commit;