**   INSERT INTO data_ft1(a, b, ota_rowid, ota_control) 
**       VALUES(NULL, 'usa', 12, '.x');
**
** causes a result similar to:
**
**   UPDATE ft1 SET b = 'usa' WHERE rowid = 12;
**






**
** USAGE
**
** The API declared below allows an application to apply an OTA update 
** stored on disk to an existing target database. Essentially, the 
** application:
**

**   INSERT INTO data_ft1(a, b, ota_rowid, ota_control) 
**       VALUES(NULL, 'usa', 12, '.x');
**
** causes a result similar to:
**
**   UPDATE ft1 SET b = 'usa' WHERE rowid = 12;
**
** The data_xxx tables themselves should have no PRIMARY KEY declarations.
** However, OTA is more efficient if reading the rows in from each data_xxx
** table in "rowid" order is roughly the same as reading them sorted by
** the PRIMARY KEY of the corresponding target database table. In other 
** words, rows should be sorted using the destination table PRIMARY KEY 
** fields before they are inserted into the data_xxx tables.
**
** USAGE
**
** The API declared below allows an application to apply an OTA update 
** stored on disk to an existing target database. Essentially, the 
** application:
**