MySQL 5.7 Release Notes
Note
The value of the
show_compatibility_56 system
variable affects the information available from the tables
described here. For details, see the description of that
variable in Section 5.1.7, “Server System Variables”.
Note
Information available from the tables described here is also
available from the Performance Schema. The
INFORMATION_SCHEMA tables are deprecated in
preference to the Performance Schema tables and are removed in
MySQL 8.0. For advice on migrating away from the
INFORMATION_SCHEMA tables to the Performance
Schema tables, see
Section 25.20, “Migrating to Performance Schema System and Status Variable Tables”.
The GLOBAL_STATUS and
SESSION_STATUS tables provide
information about server status variables. Their contents
correspond to the information produced by the
SHOW GLOBAL
STATUS and
SHOW SESSION
STATUS statements (see Section 13.7.5.35, “SHOW STATUS Statement”).
Notes
The
VARIABLE_VALUEcolumn for each of these tables is defined asVARCHAR(1024).