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SHOW TABLES FROM information_schema LIKE 'EVENTS';
Tables_in_information_schema (EVENTS)
EVENTS
#######################################################################
# Testcase 3.2.1.1: INFORMATION_SCHEMA tables can be queried via SELECT
#######################################################################
DROP VIEW IF EXISTS test.v1;
DROP PROCEDURE IF EXISTS test.p1;
DROP FUNCTION IF EXISTS test.f1;
CREATE VIEW test.v1 AS SELECT * FROM information_schema.EVENTS;
CREATE PROCEDURE test.p1() SELECT * FROM information_schema.EVENTS;
CREATE FUNCTION test.f1() returns BIGINT
BEGIN
DECLARE counter BIGINT DEFAULT NULL;
SELECT COUNT(*) INTO counter FROM information_schema.EVENTS;
RETURN counter;
END//
# Attention: The printing of the next result sets is disabled.
SELECT * FROM information_schema.EVENTS;
SELECT * FROM test.v1;
CALL test.p1;
SELECT test.f1();
DROP VIEW test.v1;
DROP PROCEDURE test.p1;
DROP FUNCTION test.f1;
#########################################################################
# Testcase 3.2.12.1: INFORMATION_SCHEMA.EVENTS layout
#########################################################################
DESCRIBE information_schema.EVENTS;
Field Type Null Key Default Extra
EVENT_CATALOG varchar(64) NO NULL
EVENT_SCHEMA varchar(64) NO NULL
EVENT_NAME varchar(64) NO NULL
DEFINER varchar(384) NO NULL
TIME_ZONE varchar(64) NO NULL
EVENT_BODY varchar(8) NO NULL
EVENT_DEFINITION longtext NO NULL
EVENT_TYPE varchar(9) NO NULL
EXECUTE_AT datetime YES NULL
INTERVAL_VALUE varchar(256) YES NULL
INTERVAL_FIELD varchar(18) YES NULL
SQL_MODE varchar(8192) NO NULL
STARTS datetime YES NULL
ENDS datetime YES NULL
STATUS varchar(18) NO NULL
ON_COMPLETION varchar(12) NO NULL
CREATED datetime NO NULL
LAST_ALTERED datetime NO NULL
LAST_EXECUTED datetime YES NULL
EVENT_COMMENT varchar(64) NO NULL
ORIGINATOR bigint(10) NO NULL
CHARACTER_SET_CLIENT varchar(32) NO NULL
COLLATION_CONNECTION varchar(64) NO NULL
DATABASE_COLLATION varchar(64) NO NULL
SHOW CREATE TABLE information_schema.EVENTS;
Table Create Table
EVENTS CREATE TEMPORARY TABLE `EVENTS` (
`EVENT_CATALOG` varchar(64) NOT NULL,
`EVENT_SCHEMA` varchar(64) NOT NULL,
`EVENT_NAME` varchar(64) NOT NULL,
`DEFINER` varchar(384) NOT NULL,
`TIME_ZONE` varchar(64) NOT NULL,
`EVENT_BODY` varchar(8) NOT NULL,
`EVENT_DEFINITION` longtext NOT NULL,
`EVENT_TYPE` varchar(9) NOT NULL,
`EXECUTE_AT` datetime,
`INTERVAL_VALUE` varchar(256),
`INTERVAL_FIELD` varchar(18),
`SQL_MODE` varchar(8192) NOT NULL,
`STARTS` datetime,
`ENDS` datetime,
`STATUS` varchar(18) NOT NULL,
`ON_COMPLETION` varchar(12) NOT NULL,
`CREATED` datetime NOT NULL,
`LAST_ALTERED` datetime NOT NULL,
`LAST_EXECUTED` datetime,
`EVENT_COMMENT` varchar(64) NOT NULL,
`ORIGINATOR` bigint(10) NOT NULL,
`CHARACTER_SET_CLIENT` varchar(32) NOT NULL,
`COLLATION_CONNECTION` varchar(64) NOT NULL,
`DATABASE_COLLATION` varchar(64) NOT NULL
) DEFAULT CHARSET=utf8mb3 COLLATE=utf8mb3_general_ci
SHOW COLUMNS FROM information_schema.EVENTS;
Field Type Null Key Default Extra
EVENT_CATALOG varchar(64) NO NULL
EVENT_SCHEMA varchar(64) NO NULL
EVENT_NAME varchar(64) NO NULL
DEFINER varchar(384) NO NULL
TIME_ZONE varchar(64) NO NULL
EVENT_BODY varchar(8) NO NULL
EVENT_DEFINITION longtext NO NULL
EVENT_TYPE varchar(9) NO NULL
EXECUTE_AT datetime YES NULL
INTERVAL_VALUE varchar(256) YES NULL
INTERVAL_FIELD varchar(18) YES NULL
SQL_MODE varchar(8192) NO NULL
STARTS datetime YES NULL
ENDS datetime YES NULL
STATUS varchar(18) NO NULL
ON_COMPLETION varchar(12) NO NULL
CREATED datetime NO NULL
LAST_ALTERED datetime NO NULL
LAST_EXECUTED datetime YES NULL
EVENT_COMMENT varchar(64) NO NULL
ORIGINATOR bigint(10) NO NULL
CHARACTER_SET_CLIENT varchar(32) NO NULL
COLLATION_CONNECTION varchar(64) NO NULL
DATABASE_COLLATION varchar(64) NO NULL
SELECT event_catalog, event_name, event_body, event_type, event_type,
status, on_completion
FROM information_schema.events
WHERE event_catalog IS NOT NULL or
event_body NOT IN ('SQL') or
event_type NOT IN ('ONE TIME','RECURRING') or
status NOT IN ('ENABLED','DISABLED','SLAVESIDE_DISABLED') or
on_completion NOT IN ('PRESERVE','NOT PRESERVE');
event_catalog event_name event_body event_type event_type status on_completion
########################################################################
# Testcases 3.2.1.3-3.2.1.5 + 3.2.1.8-3.2.1.12: INSERT/UPDATE/DELETE and
# DDL on INFORMATION_SCHEMA tables are not supported
########################################################################
DROP DATABASE IF EXISTS db_datadict;
CREATE DATABASE db_datadict;
CREATE TABLE db_datadict.t1 (f1 BIGINT)
ENGINE = <engine_type>;
INSERT INTO information_schema.events
SELECT * FROM information_schema.events;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
UPDATE information_schema.events SET event_name = '1234567'
WHERE table_name = 't1';
Got one of the listed errors
DELETE FROM information_schema.events WHERE event_catalog IS NULL;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
TRUNCATE information_schema.events;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
CREATE INDEX my_idx_on_events ON information_schema.events(event_name);
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.events DROP PRIMARY KEY;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.events ADD f1 INT;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP TABLE information_schema.events;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.events RENAME db_datadict.events;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
ALTER TABLE information_schema.events RENAME information_schema.xevents;
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
DROP DATABASE db_datadict;
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