I am trying to understand the code flow of mysql-5.5.15 mysqld server.
1. I am able to use fprintf(stdout, ..) to print out messages to the console
in the main startup code of mysqld.
2. I cannot use fprintf in any of the thread context to print messages to
the console. Why is this?
3. If I compile the source code with the debug option and use DBUG_PRINT,
then it does not work in some cases, specifically in the function
do_handle_one_connection() in sql/sql_connect.cc.
4. DBUG_PRINT works and is used in the function do_command which is called
by the do_handle_one_connection() method. From what I observed, is
DBUG_ENTER always required to be able to DBUG_PRINT?