refer: https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL

#’[]’ 表示可选，’|’ 表示二选一

CREATE [EXTERNAL] TABLE [IF NOT EXISTS] table_name     [(col_name data_type [COMMENT col_comment], ...)]     [COMMENT table_comment]     [PARTITIONED BY (col_name data_type       [COMMENT col_comment], ...)]     [CLUSTERED BY (col_name, col_name, ...)     [SORTED BY (col_name [ASC|DESC], ...)]     INTO num_buckets BUCKETS]     [ROW FORMAT row_format]     [STORED AS file_format]     [LOCATION hdfs_path] 

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data_type
  : primitive_type
  | array_type
  | map_type
  | struct_type
  | union_type  -- (Note: Available in Hive 0.7.0 and later)

primitive_type
  : TINYINT
  | SMALLINT
  | INT
  | BIGINT
  | BOOLEAN
  | FLOAT
  | DOUBLE
  | DOUBLE PRECISION -- (Note: Available in Hive 2.2.0 and later)
  | STRING
  | BINARY      -- (Note: Available in Hive 0.8.0 and later)
  | TIMESTAMP  -- (Note: Available in Hive 0.8.0 and later)
  | DECIMAL    -- (Note: Available in Hive 0.11.0 and later)
  | DECIMAL(precision, scale)  -- (Note: Available in Hive 0.13.0 and later)
  | DATE        -- (Note: Available in Hive 0.12.0 and later)
  | VARCHAR    -- (Note: Available in Hive 0.12.0 and later)
  | CHAR        -- (Note: Available in Hive 0.13.0 and later)

array_type
  : ARRAY < data_type >

map_type
  : MAP < primitive_type, data_type >

struct_type
  : STRUCT < col_name : data_type [COMMENT col_comment], ...>

union_type
   : UNIONTYPE < data_type, data_type, ... >  -- (Note: Available in Hive 0.7.0 and later)

row_format
   : DELIMITED [FIELDS TERMINATED BY char [ESCAPED BY char]] [COLLECTION ITEMS TERMINATED BY char]
   [MAP KEYS TERMINATED BY char] [LINES TERMINATED BY char]
   [NULL DEFINED AS char]  -- (Note: Available in Hive 0.13 and later)
   | SERDE serde_name [WITH SERDEPROPERTIES (property_name=property_value, property_name=property_value, ...)]

file_format:
  : SEQUENCEFILE
  | TEXTFILE    -- (Default, depending on hive.default.fileformat configuration)
  | RCFILE      -- (Note: Available in Hive 0.6.0 and later)
  | ORC        -- (Note: Available in Hive 0.11.0 and later)
  | PARQUET    -- (Note: Available in Hive 0.13.0 and later)
  | AVRO        -- (Note: Available in Hive 0.14.0 and later)
  | INPUTFORMAT input_format_classname OUTPUTFORMAT output_format_classname

constraint_specification:
  : [, PRIMARY KEY (col_name, ...) DISABLE NOVALIDATE ]
    [, CONSTRAINT constraint_name FOREIGN KEY (col_name, ...) REFERENCES table_name(col_name, ...) DISABLE NOVALIDATE

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