Critical Description
AUTHZ_OBJ_NAME has (384) chars. It is constructed by sentry from notification event as DB_NAME + "." + TBL_NAME. To be consistent with hive, sentry should use the same char set as what's used by DB_NAME and TBL_NAME
Besides, if its table char set is utf8, the constrain AUTHZOBJNAME will have error "Specified key was too long; max key length is 767 bytes" for mysql.
The solution is to drop the index includes this field, so it works for mysql regardless the char set of its table or DB.
Reference:
1) CREATE TABLE AUTHZ_PATHS_MAPPING
(
AUTHZ_OBJ_ID BIGINT NOT NULL generated always as identity (start with 1),
AUTHZ_OBJ_NAME VARCHAR(384),
CREATE_TIME_MS BIGINT NOT NULL
);
CREATE UNIQUE INDEX AUTHZOBJNAME ON AUTHZ_PATHS_MAPPING (AUTHZ_OBJ_NAME);
2) AUTHZ_OBJ_NAME is constructed by sentry from notification event as DB_NAME + "." + TBL_NAME. To be consistent with hive, sentry should use the same char set as what's used by DB_NAME and TBL_NAME in NotificationProcessor.processAlterTable().
3) hive uses latin1 as default charset for notification event.
CREATE TABLE IF NOT EXISTS `NOTIFICATION_LOG`
(
`NL_ID` BIGINT(20) NOT NULL,
`EVENT_ID` BIGINT(20) NOT NULL,
`EVENT_TIME` INT(11) NOT NULL,
`EVENT_TYPE` varchar(32) NOT NULL,
`DB_NAME` varchar(128),
`TBL_NAME` varchar(128),
`MESSAGE` mediumtext,
PRIMARY KEY (`NL_ID`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
4) actual installation shows both fields are in latin1 char set.
SHOW FULL COLUMNS FROM NOTIFICATION_LOG;
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| Field | Type | Collation | Null | Key | Default | Extra | Privileges | Comment |
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| NL_ID | bigint(20) | NULL | NO | PRI | NULL | select,insert,update,references | ||
| EVENT_ID | bigint(20) | NULL | NO | NULL | select,insert,update,references | |||
| EVENT_TIME | int(11) | NULL | NO | NULL | select,insert,update,references | |||
| EVENT_TYPE | varchar(32) | latin1_swedish_ci | NO | NULL | select,insert,update,references | |||
| DB_NAME | varchar(128) | latin1_swedish_ci | YES | NULL | select,insert,update,references | |||
| TBL_NAME | varchar(128) | latin1_swedish_ci | YES | NULL | select,insert,update,references | |||
| MESSAGE | mediumtext | latin1_swedish_ci | YES | NULL | select,insert,update,references |
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