Determine The Virtual Table Conflict Policy
\ int sqlite3_vtab_on_conflict(sqlite3 *);\
This function may only be called from within a call to the xUpdate method of a virtual table implementation for an INSERT or UPDATE operation. The value returned is one of SQLITE_ROLLBACK, SQLITE_IGNORE, SQLITE_FAIL, SQLITE_ABORT, or SQLITE_REPLACE, according to the ON CONFLICT mode of the SQL statement that triggered the call to the xUpdate method of the virtual table.