Shared Tables
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By default TurboDB tables are opened in shared mode. This allows applications to access the same database tables at the same time. In order to prevent inconsistent changes to the table, there is a transparent locking mechanism that locks a record for the time it is modified by one application.

Some operations need exclusive access to a database table and are therefore rejected if another application accesses the table. These operations are:
·Altering a table  
·Deleting a table  
·Deleting an index