预留关键字 
==========================



目前，OceanBase 数据库 MySQL 模式下的预留关键如下所示。


|--------------|-------------------------------|---------------------|--------------------|-------------------|
| A                                                                                                       |||||
| ACCESSIBLE   | ADD                           | ALL                 | ALTER              | ANALYZE           |
| AND          | AS                            | ASC                 | ASENSITIVE                            ||
| B                                                                                                       |||||
| BEFORE       | BETWEEN                       | BIGINT              | BINARY             | BLOB              |
| BOTH         | BY                                                                                        ||||
| C                                                                                                       |||||
| CALL         | CASCADE                       | CASE                | CHANGE             | CHAR              |
| CHARACTER    | CHECK                         | COLLATE             | COLUMN             | CONDITION         |
| CONSTRAINT   | CONTINUE                      | CON                 | VERT               | CREATE            |
| CROSS        | CURRENT_DATE                  | CURRENT_TIME        | CURRENT_TIME       | STAMP             |
| CURRENT_USER | CURSOR                                                                                    ||||
| D                                                                                                       |||||
| DATABASE     | DATABASES                     | DAY_HOUR            | DAY_MICROSECOND    | DAY_MINUTE        |
| DAY_SECOND   | DECLARE                       | DECIMAL             | DEFAULT            | DELAYED           |
| DELETE       | DESC                          | DESCRIBE            | DETERMINISTIC      | DISTINCT          |
| DISTINCTROW  | DIV                           | DOUBLE              | DROP               | DUAL              |
| E                                                                                                       |||||
| EACH         | ELSE                          | ELSEIF              | ENCLOSED           | ESCAPED           |
| EXISTS       | EXIT                          | EXPLAIN                                                    |||
| F                                                                                                       |||||
| FETCH        | FLOAT                         | FLOAT4              | FLOAT8             | FOR               |
| FORCE        | FOREIGN                       | FROM                | FULLTEXT                              ||
| G                                                                                                       |||||
| GENERATED    | GET                           | GRANT               | GROUP                                 ||
| H                                                                                                       |||||
| HAVING       | HIGH_PRIORITY                 | HOUR_MICROSECOND    | HOUR_MINUTE        | HOUR_SECOND       |
| I                                                                                                       |||||
| IF           | IGNORE                        | IN                  | INDEX              | INFILE            |
| INNER        | INOUT                         | INSENSITIVE         | INSERT             | INT               |
| INT1         | INT2                          | INT3                | INT4               | INT8              |
| INTEGER      | INTERVAL                      | INTO                | IO_AFTER_GTIDS     | IO_BEFORE_GTIDS   |
| IS           | ITERATE                                                                                   ||||
| J                                                                                                       |||||
| JOIN                                                                                                    |||||
| K                                                                                                       |||||
| KEY          | KEYS                          | KILL                                                       |||
| L                                                                                                       |||||
| LEADING      | LEAVE                         | LEFT                | LIKE               | LIMIT             |
| LINEAR       | LINES                         | LOAD                | LOCALTIME          | LOCALTIMESTAMP    |
| LONG         | LONGBLOB                      | LONGTEXT            | LOOP               | LOW_PRIORITY      |
| M                                                                                                       |||||
| MASTER_BIND  | MASTER_SSL_VERIFY_SERVER_CERT | MATCH               | MAXVALUE           | MEDIUMBLOB        |
| MEDIUMINT    | MEDIUMTEXT                    | MIDDLEINT           | MINUTE_MICROSECOND | MINUTE_SECOND MOD |
| MODIFIES                                                                                                |||||
| N                                                                                                       |||||
| NATURAL      | NOT                           | NO_WRITE_TO_BINLOG                                         |||
| O                                                                                                       |||||
| ON           | OPTIMIZE                      | OPTION              | OPTIONALLY         | OR                |
| ORDER        | OUT                           | OUTER               | OUTFILE                               ||
| P                                                                                                       |||||
| PARTITION    | PRECISION                     | PRIMARY             | PROCEDURE          | PURGE             |
| R                                                                                                       |||||
| RANGE        | READ                          | READS               | READ_WRITE         | REAL              |
| REFERENCES   | REGEXP                        | RELEASE             | RENAME             | REPEAT            |
| REPLACE      | REQUIRE                       | RESIGNAL            | RESTRICT           | RETURN            |
| REVOKE       | RIGHT                         | RLIKE                                                      |||
| S                                                                                                       |||||
| SCHEMA       | SCHEMAS                       | SECOND_MICROSECOND  | SELECT             | SENSITIVE         |
| SEPARATOR    | SET                           | SHOW                | SIGNAL             | SMALLINT          |
| SPATIAL      | SPECIFIC                      | SQL                 | SQLEXCEPTION       | SQLSTATE          |
| SQLWARNING   | SQL_BIG_RESULT                | SQL_CALC_FOUND_ROWS | SQL_SMALL_RESULT   | SSL               |
| STARTING     | STORED                        | STRAIGHT_JOIN                                              |||
| T                                                                                                       |||||
| TABLE        | TERMINATED                    | THEN                | TINYBLOB           | TINYINT           |
| TINYTEXT     | TO                            | TRAILING            | TRIGGER            | TABLEGROUP        |
| U                                                                                                       |||||
| UNDO         | UNION                         | UNIQUE              | UNLOCK             | UNSIGNED          |
| UPDATE       | USAGE                         | USE                 | USING              | UTC_DATE          |
| UTC_TIME     | UTC_TIMESTAMP                                                                             ||||
| V                                                                                                       |||||
| VALUES       | VARBINARY                     | VARCHAR             | VARCHARACTER       | VARYING           |
| VIRTUAL                                                                                                 |||||
| W                                                                                                       |||||
| WHEN         | WHERE                         | WHILE               | WITH               | WRITE             |
| X                                                                                                       |||||
| XOR                                                                                                     |||||
| Y                                                                                                       |||||
| YEAR_MONTH                                                                                              |||||
| Z                                                                                                       |||||
| ZEROFILL                                                                                                |||||


