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MySQL 返回的查询结果为空 (即零行)。 (查询花费 0.0002 秒。)
SELECT * FROM `events_statements_history`
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THREAD_ID
Thread associated with the event. Together with EV… |
EVENT_ID
Thread's current event number at the start of the … |
END_EVENT_ID
NULL when the event starts, set to the thread's cu… |
EVENT_NAME
Event instrument name and a NAME from the setup_in… |
SOURCE
Name and line number of the source file containing… |
TIMER_START
Value in picoseconds when the event timing started… |
TIMER_END
Value in picoseconds when the event timing ended, … |
TIMER_WAIT
Value in picoseconds of the event's duration or NU… |
LOCK_TIME
Time in picoseconds spent waiting for locks. The t… |
SQL_TEXT
The SQL statement, or NULL if the command is not a… |
DIGEST
Statement digest. |
DIGEST_TEXT
Statement digest text. |
CURRENT_SCHEMA
Statement's default database for the statement, or… |
OBJECT_TYPE
Reserved, currently NULL |
OBJECT_SCHEMA
Reserved, currently NULL |
OBJECT_NAME
Reserved, currently NULL |
OBJECT_INSTANCE_BEGIN
Address in memory of the statement object. |
MYSQL_ERRNO
Error code. See MariaDB Error Codes for a full lis… |
RETURNED_SQLSTATE
The SQLSTATE value. |
MESSAGE_TEXT
Statement error message. See MariaDB Error Codes. |
ERRORS
0 if SQLSTATE signifies completion (starting with … |
WARNINGS
Number of warnings from the diagnostics area. |
ROWS_AFFECTED
Number of rows affected the statement affected. |
ROWS_SENT
Number of rows returned. |
ROWS_EXAMINED
Number of rows read during the statement's executi… |
CREATED_TMP_DISK_TABLES
Number of on-disk temp tables created by the state… |
CREATED_TMP_TABLES
Number of temp tables created by the statement. |
SELECT_FULL_JOIN
Number of joins performed by the statement which d… |
SELECT_FULL_RANGE_JOIN
Number of joins performed by the statement which u… |
SELECT_RANGE
Number of joins performed by the statement which u… |
SELECT_RANGE_CHECK
Number of joins without keys performed by the stat… |
SELECT_SCAN
Number of joins performed by the statement which u… |
SORT_MERGE_PASSES
Number of merge passes by the sort algorithm perfo… |
SORT_RANGE
Number of sorts performed by the statement which u… |
SORT_ROWS
Number of rows sorted by the statement. |
SORT_SCAN
Number of sorts performed by the statement which u… |
NO_INDEX_USED
0 if the statement performed a table scan with an … |
NO_GOOD_INDEX_USED
0 if a good index was found for the statement, 1 i… |
NESTING_EVENT_ID
Reserved, currently NULL. |
NESTING_EVENT_TYPE
Reserved, currently NULL. |
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