Comment 2 for bug 1197049

The problem lays inthe qtbase module of the Qt5 stack (qtbase-opensource-src source package in Ubuntu)the src/3rdparty/sqlite/sqlite3.c

These files are named starting with this prefix followed by 16 random alphanumeric characters, and no file extension. They are stored in the platform's standard temporary file directory, and are deleted prior to exit of the application using the sqlite3
This defaulty etilqs[.*] (read backward :) ) file name scheme can be changed with using -DSQLITE_TEMP_FILE_PREFIX=myprefix_ on the compiler command line.