The .iotrace command controls I/O trace debugging.
If a filename is given, I/O trace will be turned on in the main
library and directed to the file. If a single dash is given, I/O
trace will be redirected to standard output. If no parameters
are given, I/O trace will be disabled.
The .iotrace command is only available if both the
SQLite library and sqlite3
are compiled with the directive SQLITE_ENABLE_IOTRACE.