Fatal error: Uncaught exception 'mysqli_sql_exception' with message 'No index used in query/prepared statement'

Question

When I run the following code, I get the error saying

Fatal error: Uncaught exception \'mysqli_sql_exception\' with message \'No index used in que

Answer 1

Take a look at this bug-report : #35450 mysqli extension reports too many warnings

Quoting a few sentences of a note :

Mysqli extension throws too many warnings.
For example, "SELECT * FROM table" results in a warning: "Warning: mysqli::query(): No index used in query/prepared statement SELECT * FROM table ..."

And, quoting another note, which seems interesting :

Use mysqli_report() to disable that.