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# test 32bit overflow with connection id --source include/have_debug.inc # Connect and disconnect once, to create a "hole" in connection ids connect con1, localhost,root; disconnect con1; connect con2, localhost,root; connection con2; connection default; let $max_id = `SELECT MAX(ID) FROM INFORMATION_SCHEMA.PROCESSLIST`; SET @orig_debug=@@debug_dbug; SET GLOBAL DEBUG_DBUG='+d,thread_id_overflow'; connect con3, localhost,root; connection con3; # next line gives UINT32_MAX -1; SELECT CONNECTION_ID(); connection default; SET GLOBAL DEBUG_DBUG=@orig_debug; connect con4, localhost,root; connection con4; --replace_result $max_id max_id eval select IF(connection_id() - $max_id = 1,'Good','Bad') as result; disconnect con4; disconnect con3; disconnect con2; connection default;