SQLite Forum

use of "notnull" and "unique" in column names
`sqlite3_db_handle()` takes a pointer to a prepared (successfully compiled) statement as an argument and returns a pointer to the owning connection.

The `sqlite3_prepare*()` returned something other than `SQLITE_OK`, indicating a failure to prepare (compile) the statement source.  As such there is no "prepared statement" from which the owning connection can be retrieved.

This is conceptually simillar to attempting to read byte 407f of the executable produced by a failed compliation.  The compilation failure resulted in no executable output, so attempting to find the value of byte 407f of the executable will fail (there is no executable produced).