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SELECT * FROM `COLUMNS` ORDER BY `COLUMN_COMMENT` DESC
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TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION COLUMN_DEFAULT IS_NULLABLE DATA_TYPE CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH NUMERIC_PRECISION NUMERIC_SCALE DATETIME_PRECISION CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT 递减 递增 1 IS_GENERATED GENERATION_EXPRESSION
def performance_schema threads INSTRUMENTED 14 NULL NO enum 3 9 NULL NULL NULL utf8 utf8_general_ci enum('YES','NO') select,insert,update,references YES or NO for Whether the thread is instrumented o... NEVER NULL
def performance_schema setup_consumers ENABLED 2 NULL NO enum 3 9 NULL NULL NULL utf8 utf8_general_ci enum('YES','NO') select,insert,update,references YES or NO for whether or not the consumer is enabl... NEVER NULL
def performance_schema host_cache HOST_VALIDATED 3 NULL NO enum 3 9 NULL NULL NULL utf8 utf8_general_ci enum('YES','NO') select,insert,update,references YES if the IP-to-host DNS lookup was successful, a... NEVER NULL
def performance_schema setup_objects TIMED 5 'YES' NO enum 3 9 NULL NULL NULL utf8 utf8_general_ci enum('YES','NO') select,insert,update,references Whether the object's events are timed or not. Can ... NEVER NULL
def performance_schema setup_objects ENABLED 4 'YES' NO enum 3 9 NULL NULL NULL utf8 utf8_general_ci enum('YES','NO') select,insert,update,references Whether the object's events are instrumented or no... NEVER NULL
def performance_schema setup_instruments TIMED 3 NULL NO enum 3 9 NULL NULL NULL utf8 utf8_general_ci enum('YES','NO') select,insert,update,references Whether or not the instrument is timed. It can be ... NEVER NULL
def performance_schema setup_instruments ENABLED 2 NULL NO enum 3 9 NULL NULL NULL utf8 utf8_general_ci enum('YES','NO') select,insert,update,references Whether or not the instrument is enabled. It can b... NEVER NULL
def performance_schema events_waits_current TIMER_START 6 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing started... NEVER NULL
def performance_schema events_waits_history TIMER_START 6 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing started... NEVER NULL
def performance_schema events_waits_history_long TIMER_START 6 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing started... NEVER NULL
def performance_schema events_stages_current TIMER_START 6 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing started... NEVER NULL
def performance_schema events_stages_history TIMER_START 6 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing started... NEVER NULL
def performance_schema events_stages_history_long TIMER_START 6 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing started... NEVER NULL
def performance_schema events_statements_current TIMER_START 6 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing started... NEVER NULL
def performance_schema events_statements_history TIMER_START 6 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing started... NEVER NULL
def performance_schema events_statements_history_long TIMER_START 6 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing started... NEVER NULL
def performance_schema events_waits_current TIMER_END 7 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing ended, ... NEVER NULL
def performance_schema events_waits_history TIMER_END 7 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing ended, ... NEVER NULL
def performance_schema events_waits_history_long TIMER_END 7 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing ended, ... NEVER NULL
def performance_schema events_stages_current TIMER_END 7 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing ended, ... NEVER NULL
def performance_schema events_stages_history TIMER_END 7 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing ended, ... NEVER NULL
def performance_schema events_stages_history_long TIMER_END 7 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing ended, ... NEVER NULL
def performance_schema events_statements_current TIMER_END 7 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing ended, ... NEVER NULL
def performance_schema events_statements_history TIMER_END 7 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing ended, ... NEVER NULL
def performance_schema events_statements_history_long TIMER_END 7 NULL YES bigint NULL NULL 20 0 NULL NULL NULL bigint(20) unsigned select,insert,update,references Value in picoseconds when the event timing ended, ... NEVER NULL
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