标识符和关键字

##命名规则

标识符用来在命名空间内唯一的表示流计算对象。命名规则如下：必须以字母开头，并且只能包含字母、数字和下划线。如果表名或列名含有空格或者特殊字符，需要用反引号括起来。不能使用关键字作为标识符。

##关键字

A-F

ADD,AFTER,ALL,ALTER,ANALYZE,AND,ANTI,ANY,ARCHIVE,ARRAY,AS,ASC,AT,BETWEEN,BOTH,BUCKET,BUCKETS,BY,CACHE,CASCADE,CASE,CAST,CHANGE,CLEAR,CLUSTER,CLUSTERED,CODEGEN,COLLECTION,COLUMN,COLUMNS,COMMENT,COMMIT,COMPACT,COMPACTIONS,COMPUTE,CONCATENATE,COST,CREATE,CROSS,CUBE,CURRENT,DATA,DATABASE,DATABASES,DBPROPERTIES,DEFINED,DELETE,DELIMITED,DESC,DESCRIBE,DFS,DIRECTORIES,DIRECTORY,DISTINCT,DISTRIBUTE,DROP,ELSE,END,ESCAPED,EXCEPT,EXCHANGE,EXISTS,EXPLAIN,EXPORT,EXTENDED,EXTERNAL,EXTRACT,FALSE,FIELDS,FILEFORMAT,FIRST,FOLLOWING,FOR,FORMAT,FORMATTED,FROM,FULL,FUNCTION,FUNCTIONS

G-L

GLOBAL,GRANT,GROUP,GROUPING,HAVING,IF,IGNORE,IMPORT,IN,INDEX,INDEXES,INNER,INPATH,INPUTFORMAT,INSERT,INTERSECT,INTERVAL,INTO,IS,ITEMS,JOIN,KEYS,LAST,LATERAL,LAZY,LEADING,LEFT,LIKE,LIMIT,LINES,LIST,LOAD,LOCAL,LOCATION,LOCK,LOCKS,LOGICAL

M-R

MACRO,MAP,MSCK,NATURAL,NO,NOT,NULL,NULLS,OF,ON,OPTION,OPTIONS,OR,ORDER,OUT,OUTER,OUTPUTFORMAT,OVER,OVERWRITE,PARTITION,PARTITIONED,PARTITIONS,PERCENTLIT,PIVOT,POSITION,PRECEDING,PRINCIPALS,PURGE,RANGE,RECORDREADER,RECORDWRITER,RECOVER,REDUCE,REFRESH,RENAME,REPAIR,REPLACE,RESET,RESTRICT,REVOKE,RIGHT,RLIKE,ROLE,ROLES,ROLLBACK,ROLLUP,ROW,ROWS

S-Z

SELECT,SEMI,SEPARATED,SERDE,SERDEPROPERTIES,SET,SETMINUS,SETS,SHOW,SKEWED,SORT,SORTED,START,STATISTICS,STORED,STRATIFY,STRUCT,TABLE,TABLES,TABLESAMPLE,TBLPROPERTIES,TEMPORARY,TERMINATED,THEN,TO,TOUCH,TRAILING,TRANSACTION,TRANSACTIONS,TRANSFORM,TRUE,TRUNCATE,UNARCHIVE,UNBOUNDED,UNCACHE,UNION,UNLOCK,UNSET,USE,USING,VALUES,VIEW,WHEN,WHERE,WINDOW,WITH