There was no way to return an error from the client library
if no MYSQL connections was established.
So here i added variables to store that king of errors and
made functions like mysql_error(NULL) to return these.
client/mysql.cc:
Bug #25097 mysql_server_init fails silently if no errmsg.sys is present.
Show the error message on std_error
include/sql_common.h:
Bug #25097 mysql_server_init fails silently if no errmsg.sys is present.
cant_connect_sqlstate constant declared
libmysql/libmysql.c:
Bug #25097 mysql_server_init fails silently if no errmsg.sys is present.
mysql_sqlstate(NULL) returns 'unknown_sqlstate'
libmysqld/lib_sql.cc:
Bug #25097 mysql_server_init fails silently if no errmsg.sys is present.
EMBEDDED_SERVER version of the vprint_msg_to_log() implemented
sql-common/client.c:
Bug #25097 mysql_server_init fails silently if no errmsg.sys is present.
mysql_server_last_errno and mysql_server_last_error introduced
to store errors not related to particular connections.
mysql_error(NULL) and mysql_errno(NULL) now returns these
mysql_server_last_error and errno respectively
sql/log.cc:
Bug #25097 mysql_server_init fails silently if no errmsg.sys is present.
EMBEDDED_LIBRARY implementation of the vprint_msg_to_log() moved
to lib_sql.cc
a4b0a2cf67