Appendix C. SQL Key Words
Table C.1 lists all tokens that are key words in the SQL standard and in PostgreSQL 13.15. Background information can be found in Section 4.1.1 . (For space reasons, only the latest two versions of the SQL standard, and SQL-92 for historical comparison, are included. The differences between those and the other intermediate standard versions are small.)
SQL distinguishes between reserved and non-reserved key words. According to the standard, reserved key words are the only real key words; they are never allowed as identifiers. Non-reserved key words only have a special meaning in particular contexts and can be used as identifiers in other contexts. Most non-reserved key words are actually the names of built-in tables and functions specified by SQL. The concept of non-reserved key words essentially only exists to declare that some predefined meaning is attached to a word in some contexts.
  In the
  
   PostgreSQL
  
  parser life is a bit
  more complicated. There are several different classes of tokens
  ranging from those that can never be used as an identifier to those
  that have absolutely no special status in the parser as compared to
  an ordinary identifier.  (The latter is usually the case for
  functions specified by SQL.)  Even reserved key words are not
  completely reserved in
  
   PostgreSQL
  
  , but
  can be used as column labels (for example,
  
   SELECT 55 AS
  CHECK
  
  , even though
  
   CHECK
  
  is a reserved key
  word).
 
In Table C.1 in the column for PostgreSQL we classify as " non-reserved " those key words that are explicitly known to the parser but are allowed as column or table names. Some key words that are otherwise non-reserved cannot be used as function or data type names and are marked accordingly. (Most of these words represent built-in functions or data types with special syntax. The function or type is still available but it cannot be redefined by the user.) Labeled " reserved " are those tokens that are not allowed as column or table names. Some reserved key words are allowable as names for functions or data types; this is also shown in the table. If not so marked, a reserved key word is only allowed as an " AS " column label name.
As a general rule, if you get spurious parser errors for commands that contain any of the listed key words as an identifier you should try to quote the identifier to see if the problem goes away.
It is important to understand before studying Table C.1 that the fact that a key word is not reserved in PostgreSQL does not mean that the feature related to the word is not implemented. Conversely, the presence of a key word does not indicate the existence of a feature.
Table C.1. SQL Key Words
| Key Word | PostgreSQL | SQL:2016 | SQL:2011 | SQL-92 | 
|---|---|---|---|---|
       
        A
       
       | 
      non-reserved | non-reserved | ||
       
        ABORT
       
       | 
      non-reserved | |||
       
        ABS
       
       | 
      reserved | reserved | ||
       
        ABSENT
       
       | 
      non-reserved | non-reserved | ||
       
        ABSOLUTE
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        ACCESS
       
       | 
      non-reserved | |||
       
        ACCORDING
       
       | 
      non-reserved | non-reserved | ||
       
        ACOS
       
       | 
      reserved | |||
       
        ACTION
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        ADA
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        ADD
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        ADMIN
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        AFTER
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        AGGREGATE
       
       | 
      non-reserved | |||
       
        ALL
       
       | 
      reserved | reserved | reserved | reserved | 
       
        ALLOCATE
       
       | 
      reserved | reserved | reserved | |
       
        ALSO
       
       | 
      non-reserved | |||
       
        ALTER
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        ALWAYS
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        ANALYSE
       
       | 
      reserved | |||
       
        ANALYZE
       
       | 
      reserved | |||
       
        AND
       
       | 
      reserved | reserved | reserved | reserved | 
       
        ANY
       
       | 
      reserved | reserved | reserved | reserved | 
       
        ARE
       
       | 
      reserved | reserved | reserved | |
       
        ARRAY
       
       | 
      reserved | reserved | reserved | |
       
        ARRAY_AGG
       
       | 
      reserved | reserved | ||
       
        ARRAY_ MAX_ CARDINALITY
       
       | 
      reserved | reserved | ||
       
        AS
       
       | 
      reserved | reserved | reserved | reserved | 
       
        ASC
       
       | 
      reserved | non-reserved | non-reserved | reserved | 
       
        ASENSITIVE
       
       | 
      reserved | reserved | ||
       
        ASIN
       
       | 
      reserved | |||
       
        ASSERTION
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        ASSIGNMENT
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        ASYMMETRIC
       
       | 
      reserved | reserved | reserved | |
       
        AT
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        ATAN
       
       | 
      reserved | |||
       
        ATOMIC
       
       | 
      reserved | reserved | ||
       
        ATTACH
       
       | 
      non-reserved | |||
       
        ATTRIBUTE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        ATTRIBUTES
       
       | 
      non-reserved | non-reserved | ||
       
        AUTHORIZATION
       
       | 
      reserved (can be function or type) | reserved | reserved | reserved | 
       
        AVG
       
       | 
      reserved | reserved | reserved | |
       
        BACKWARD
       
       | 
      non-reserved | |||
       
        BASE64
       
       | 
      non-reserved | non-reserved | ||
       
        BEFORE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        BEGIN
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        BEGIN_FRAME
       
       | 
      reserved | reserved | ||
       
        BEGIN_PARTITION
       
       | 
      reserved | reserved | ||
       
        BERNOULLI
       
       | 
      non-reserved | non-reserved | ||
       
        BETWEEN
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        BIGINT
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        BINARY
       
       | 
      reserved (can be function or type) | reserved | reserved | |
       
        BIT
       
       | 
      non-reserved (cannot be function or type) | reserved | ||
       
        BIT_LENGTH
       
       | 
      reserved | |||
       
        BLOB
       
       | 
      reserved | reserved | ||
       
        BLOCKED
       
       | 
      non-reserved | non-reserved | ||
       
        BOM
       
       | 
      non-reserved | non-reserved | ||
       
        BOOLEAN
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        BOTH
       
       | 
      reserved | reserved | reserved | reserved | 
       
        BREADTH
       
       | 
      non-reserved | non-reserved | ||
       
        BY
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        C
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CACHE
       
       | 
      non-reserved | |||
       
        CALL
       
       | 
      non-reserved | reserved | reserved | |
       
        CALLED
       
       | 
      non-reserved | reserved | reserved | |
       
        CARDINALITY
       
       | 
      reserved | reserved | ||
       
        CASCADE
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        CASCADED
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        CASE
       
       | 
      reserved | reserved | reserved | reserved | 
       
        CAST
       
       | 
      reserved | reserved | reserved | reserved | 
       
        CATALOG
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        CATALOG_NAME
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CEIL
       
       | 
      reserved | reserved | ||
       
        CEILING
       
       | 
      reserved | reserved | ||
       
        CHAIN
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CHAINING
       
       | 
      non-reserved | |||
       
        CHAR
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        CHARACTER
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        CHARACTERISTICS
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CHARACTERS
       
       | 
      non-reserved | non-reserved | ||
       
        CHARACTER_LENGTH
       
       | 
      reserved | reserved | reserved | |
       
        CHARACTER_ SET_ CATALOG
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CHARACTER_SET_NAME
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CHARACTER_SET_SCHEMA
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CHAR_LENGTH
       
       | 
      reserved | reserved | reserved | |
       
        CHECK
       
       | 
      reserved | reserved | reserved | reserved | 
       
        CHECKPOINT
       
       | 
      non-reserved | |||
       
        CLASS
       
       | 
      non-reserved | |||
       
        CLASSIFIER
       
       | 
      reserved | |||
       
        CLASS_ORIGIN
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CLOB
       
       | 
      reserved | reserved | ||
       
        CLOSE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        CLUSTER
       
       | 
      non-reserved | |||
       
        COALESCE
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        COBOL
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        COLLATE
       
       | 
      reserved | reserved | reserved | reserved | 
       
        COLLATION
       
       | 
      reserved (can be function or type) | non-reserved | non-reserved | reserved | 
       
        COLLATION_CATALOG
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        COLLATION_NAME
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        COLLATION_SCHEMA
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        COLLECT
       
       | 
      reserved | reserved | ||
       
        COLUMN
       
       | 
      reserved | reserved | reserved | reserved | 
       
        COLUMNS
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        COLUMN_NAME
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        COMMAND_FUNCTION
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        COMMAND_ FUNCTION_ CODE
       
       | 
      non-reserved | non-reserved | ||
       
        COMMENT
       
       | 
      non-reserved | |||
       
        COMMENTS
       
       | 
      non-reserved | |||
       
        COMMIT
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        COMMITTED
       
       | 
      non-reserved | non-reserved | non-reserved | non-reserved | 
       
        CONCURRENTLY
       
       | 
      reserved (can be function or type) | |||
       
        CONDITION
       
       | 
      reserved | reserved | ||
       
        CONDITIONAL
       
       | 
      non-reserved | |||
       
        CONDITION_NUMBER
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CONFIGURATION
       
       | 
      non-reserved | |||
       
        CONFLICT
       
       | 
      non-reserved | |||
       
        CONNECT
       
       | 
      reserved | reserved | reserved | |
       
        CONNECTION
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        CONNECTION_NAME
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CONSTRAINT
       
       | 
      reserved | reserved | reserved | reserved | 
       
        CONSTRAINTS
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        CONSTRAINT_CATALOG
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CONSTRAINT_NAME
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CONSTRAINT_SCHEMA
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CONSTRUCTOR
       
       | 
      non-reserved | non-reserved | ||
       
        CONTAINS
       
       | 
      reserved | reserved | ||
       
        CONTENT
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CONTINUE
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        CONTROL
       
       | 
      non-reserved | non-reserved | ||
       
        CONVERSION
       
       | 
      non-reserved | |||
       
        CONVERT
       
       | 
      reserved | reserved | reserved | |
       
        COPY
       
       | 
      non-reserved | reserved | ||
       
        CORR
       
       | 
      reserved | reserved | ||
       
        CORRESPONDING
       
       | 
      reserved | reserved | reserved | |
       
        COS
       
       | 
      reserved | |||
       
        COSH
       
       | 
      reserved | |||
       
        COST
       
       | 
      non-reserved | |||
       
        COUNT
       
       | 
      reserved | reserved | reserved | |
       
        COVAR_POP
       
       | 
      reserved | reserved | ||
       
        COVAR_SAMP
       
       | 
      reserved | reserved | ||
       
        CREATE
       
       | 
      reserved | reserved | reserved | reserved | 
       
        CROSS
       
       | 
      reserved (can be function or type) | reserved | reserved | reserved | 
       
        CSV
       
       | 
      non-reserved | |||
       
        CUBE
       
       | 
      non-reserved | reserved | reserved | |
       
        CUME_DIST
       
       | 
      reserved | reserved | ||
       
        CURRENT
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        CURRENT_CATALOG
       
       | 
      reserved | reserved | reserved | |
       
        CURRENT_DATE
       
       | 
      reserved | reserved | reserved | reserved | 
       
        CURRENT_ DEFAULT_ TRANSFORM_ GROUP
       
       | 
      reserved | reserved | ||
       
        CURRENT_PATH
       
       | 
      reserved | reserved | ||
       
        CURRENT_ROLE
       
       | 
      reserved | reserved | reserved | |
       
        CURRENT_ROW
       
       | 
      reserved | reserved | ||
       
        CURRENT_SCHEMA
       
       | 
      reserved (can be function or type) | reserved | reserved | |
       
        CURRENT_TIME
       
       | 
      reserved | reserved | reserved | reserved | 
       
        CURRENT_TIMESTAMP
       
       | 
      reserved | reserved | reserved | reserved | 
       
        CURRENT_ TRANSFORM_ GROUP_ FOR_ TYPE
       
       | 
      reserved | reserved | ||
       
        CURRENT_USER
       
       | 
      reserved | reserved | reserved | reserved | 
       
        CURSOR
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        CURSOR_NAME
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        CYCLE
       
       | 
      non-reserved | reserved | reserved | |
       
        DATA
       
       | 
      non-reserved | non-reserved | non-reserved | non-reserved | 
       
        DATABASE
       
       | 
      non-reserved | |||
       
        DATALINK
       
       | 
      reserved | reserved | ||
       
        DATE
       
       | 
      reserved | reserved | reserved | |
       
        DATETIME_ INTERVAL_ CODE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        DATETIME_ INTERVAL_ PRECISION
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        DAY
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        DB
       
       | 
      non-reserved | non-reserved | ||
       
        DEALLOCATE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        DEC
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        DECFLOAT
       
       | 
      reserved | |||
       
        DECIMAL
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        DECLARE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        DEFAULT
       
       | 
      reserved | reserved | reserved | reserved | 
       
        DEFAULTS
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        DEFERRABLE
       
       | 
      reserved | non-reserved | non-reserved | reserved | 
       
        DEFERRED
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        DEFINE
       
       | 
      reserved | |||
       
        DEFINED
       
       | 
      non-reserved | non-reserved | ||
       
        DEFINER
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        DEGREE
       
       | 
      non-reserved | non-reserved | ||
       
        DELETE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        DELIMITER
       
       | 
      non-reserved | |||
       
        DELIMITERS
       
       | 
      non-reserved | |||
       
        DENSE_RANK
       
       | 
      reserved | reserved | ||
       
        DEPENDS
       
       | 
      non-reserved | |||
       
        DEPTH
       
       | 
      non-reserved | non-reserved | ||
       
        DEREF
       
       | 
      reserved | reserved | ||
       
        DERIVED
       
       | 
      non-reserved | non-reserved | ||
       
        DESC
       
       | 
      reserved | non-reserved | non-reserved | reserved | 
       
        DESCRIBE
       
       | 
      reserved | reserved | reserved | |
       
        DESCRIPTOR
       
       | 
      non-reserved | non-reserved | reserved | |
       
        DETACH
       
       | 
      non-reserved | |||
       
        DETERMINISTIC
       
       | 
      reserved | reserved | ||
       
        DIAGNOSTICS
       
       | 
      non-reserved | non-reserved | reserved | |
       
        DICTIONARY
       
       | 
      non-reserved | |||
       
        DISABLE
       
       | 
      non-reserved | |||
       
        DISCARD
       
       | 
      non-reserved | |||
       
        DISCONNECT
       
       | 
      reserved | reserved | reserved | |
       
        DISPATCH
       
       | 
      non-reserved | non-reserved | ||
       
        DISTINCT
       
       | 
      reserved | reserved | reserved | reserved | 
       
        DLNEWCOPY
       
       | 
      reserved | reserved | ||
       
        DLPREVIOUSCOPY
       
       | 
      reserved | reserved | ||
       
        DLURLCOMPLETE
       
       | 
      reserved | reserved | ||
       
        DLURLCOMPLETEONLY
       
       | 
      reserved | reserved | ||
       
        DLURLCOMPLETEWRITE
       
       | 
      reserved | reserved | ||
       
        DLURLPATH
       
       | 
      reserved | reserved | ||
       
        DLURLPATHONLY
       
       | 
      reserved | reserved | ||
       
        DLURLPATHWRITE
       
       | 
      reserved | reserved | ||
       
        DLURLSCHEME
       
       | 
      reserved | reserved | ||
       
        DLURLSERVER
       
       | 
      reserved | reserved | ||
       
        DLVALUE
       
       | 
      reserved | reserved | ||
       
        DO
       
       | 
      reserved | |||
       
        DOCUMENT
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        DOMAIN
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        DOUBLE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        DROP
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        DYNAMIC
       
       | 
      reserved | reserved | ||
       
        DYNAMIC_FUNCTION
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        DYNAMIC_ FUNCTION_ CODE
       
       | 
      non-reserved | non-reserved | ||
       
        EACH
       
       | 
      non-reserved | reserved | reserved | |
       
        ELEMENT
       
       | 
      reserved | reserved | ||
       
        ELSE
       
       | 
      reserved | reserved | reserved | reserved | 
       
        EMPTY
       
       | 
      reserved | non-reserved | ||
       
        ENABLE
       
       | 
      non-reserved | |||
       
        ENCODING
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        ENCRYPTED
       
       | 
      non-reserved | |||
       
        END
       
       | 
      reserved | reserved | reserved | reserved | 
       
        END-EXEC
       
       | 
      reserved | reserved | reserved | |
       
        END_FRAME
       
       | 
      reserved | reserved | ||
       
        END_PARTITION
       
       | 
      reserved | reserved | ||
       
        ENFORCED
       
       | 
      non-reserved | non-reserved | ||
       
        ENUM
       
       | 
      non-reserved | |||
       
        EQUALS
       
       | 
      reserved | reserved | ||
       
        ERROR
       
       | 
      non-reserved | |||
       
        ESCAPE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        EVENT
       
       | 
      non-reserved | |||
       
        EVERY
       
       | 
      reserved | reserved | ||
       
        EXCEPT
       
       | 
      reserved | reserved | reserved | reserved | 
       
        EXCEPTION
       
       | 
      reserved | |||
       
        EXCLUDE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        EXCLUDING
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        EXCLUSIVE
       
       | 
      non-reserved | |||
       
        EXEC
       
       | 
      reserved | reserved | reserved | |
       
        EXECUTE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        EXISTS
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        EXP
       
       | 
      reserved | reserved | ||
       
        EXPLAIN
       
       | 
      non-reserved | |||
       
        EXPRESSION
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        EXTENSION
       
       | 
      non-reserved | |||
       
        EXTERNAL
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        EXTRACT
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        FALSE
       
       | 
      reserved | reserved | reserved | reserved | 
       
        FAMILY
       
       | 
      non-reserved | |||
       
        FETCH
       
       | 
      reserved | reserved | reserved | reserved | 
       
        FILE
       
       | 
      non-reserved | non-reserved | ||
       
        FILTER
       
       | 
      non-reserved | reserved | reserved | |
       
        FINAL
       
       | 
      non-reserved | non-reserved | ||
       
        FINISH
       
       | 
      non-reserved | |||
       
        FIRST
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        FIRST_VALUE
       
       | 
      reserved | reserved | ||
       
        FLAG
       
       | 
      non-reserved | non-reserved | ||
       
        FLOAT
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        FLOOR
       
       | 
      reserved | reserved | ||
       
        FOLLOWING
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        FOR
       
       | 
      reserved | reserved | reserved | reserved | 
       
        FORCE
       
       | 
      non-reserved | |||
       
        FOREIGN
       
       | 
      reserved | reserved | reserved | reserved | 
       
        FORMAT
       
       | 
      non-reserved | |||
       
        FORTRAN
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        FORWARD
       
       | 
      non-reserved | |||
       
        FOUND
       
       | 
      non-reserved | non-reserved | reserved | |
       
        FRAME_ROW
       
       | 
      reserved | reserved | ||
       
        FREE
       
       | 
      reserved | reserved | ||
       
        FREEZE
       
       | 
      reserved (can be function or type) | |||
       
        FROM
       
       | 
      reserved | reserved | reserved | reserved | 
       
        FS
       
       | 
      non-reserved | non-reserved | ||
       
        FULFILL
       
       | 
      non-reserved | |||
       
        FULL
       
       | 
      reserved (can be function or type) | reserved | reserved | reserved | 
       
        FUNCTION
       
       | 
      non-reserved | reserved | reserved | |
       
        FUNCTIONS
       
       | 
      non-reserved | |||
       
        FUSION
       
       | 
      reserved | reserved | ||
       
        G
       
       | 
      non-reserved | non-reserved | ||
       
        GENERAL
       
       | 
      non-reserved | non-reserved | ||
       
        GENERATED
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        GET
       
       | 
      reserved | reserved | reserved | |
       
        GLOBAL
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        GO
       
       | 
      non-reserved | non-reserved | reserved | |
       
        GOTO
       
       | 
      non-reserved | non-reserved | reserved | |
       
        GRANT
       
       | 
      reserved | reserved | reserved | reserved | 
       
        GRANTED
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        GREATEST
       
       | 
      non-reserved (cannot be function or type) | |||
       
        GROUP
       
       | 
      reserved | reserved | reserved | reserved | 
       
        GROUPING
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        GROUPS
       
       | 
      non-reserved | reserved | reserved | |
       
        HANDLER
       
       | 
      non-reserved | |||
       
        HAVING
       
       | 
      reserved | reserved | reserved | reserved | 
       
        HEADER
       
       | 
      non-reserved | |||
       
        HEX
       
       | 
      non-reserved | non-reserved | ||
       
        HIERARCHY
       
       | 
      non-reserved | non-reserved | ||
       
        HOLD
       
       | 
      non-reserved | reserved | reserved | |
       
        HOUR
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        ID
       
       | 
      non-reserved | non-reserved | ||
       
        IDENTITY
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        IF
       
       | 
      non-reserved | |||
       
        IGNORE
       
       | 
      non-reserved | non-reserved | ||
       
        ILIKE
       
       | 
      reserved (can be function or type) | |||
       
        IMMEDIATE
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        IMMEDIATELY
       
       | 
      non-reserved | non-reserved | ||
       
        IMMUTABLE
       
       | 
      non-reserved | |||
       
        IMPLEMENTATION
       
       | 
      non-reserved | non-reserved | ||
       
        IMPLICIT
       
       | 
      non-reserved | |||
       
        IMPORT
       
       | 
      non-reserved | reserved | reserved | |
       
        IN
       
       | 
      reserved | reserved | reserved | reserved | 
       
        INCLUDE
       
       | 
      non-reserved | |||
       
        INCLUDING
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        INCREMENT
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        INDENT
       
       | 
      non-reserved | non-reserved | ||
       
        INDEX
       
       | 
      non-reserved | |||
       
        INDEXES
       
       | 
      non-reserved | |||
       
        INDICATOR
       
       | 
      reserved | reserved | reserved | |
       
        INHERIT
       
       | 
      non-reserved | |||
       
        INHERITS
       
       | 
      non-reserved | |||
       
        INITIAL
       
       | 
      reserved | |||
       
        INITIALLY
       
       | 
      reserved | non-reserved | non-reserved | reserved | 
       
        INLINE
       
       | 
      non-reserved | |||
       
        INNER
       
       | 
      reserved (can be function or type) | reserved | reserved | reserved | 
       
        INOUT
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        INPUT
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        INSENSITIVE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        INSERT
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        INSTANCE
       
       | 
      non-reserved | non-reserved | ||
       
        INSTANTIABLE
       
       | 
      non-reserved | non-reserved | ||
       
        INSTEAD
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        INT
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        INTEGER
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        INTEGRITY
       
       | 
      non-reserved | non-reserved | ||
       
        INTERSECT
       
       | 
      reserved | reserved | reserved | reserved | 
       
        INTERSECTION
       
       | 
      reserved | reserved | ||
       
        INTERVAL
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        INTO
       
       | 
      reserved | reserved | reserved | reserved | 
       
        INVOKER
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        IS
       
       | 
      reserved (can be function or type) | reserved | reserved | reserved | 
       
        ISNULL
       
       | 
      reserved (can be function or type) | |||
       
        ISOLATION
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        JOIN
       
       | 
      reserved (can be function or type) | reserved | reserved | reserved | 
       
        JSON
       
       | 
      non-reserved | |||
       
        JSON_ARRAY
       
       | 
      reserved | |||
       
        JSON_ARRAYAGG
       
       | 
      reserved | |||
       
        JSON_EXISTS
       
       | 
      reserved | |||
       
        JSON_OBJECT
       
       | 
      reserved | |||
       
        JSON_OBJECTAGG
       
       | 
      reserved | |||
       
        JSON_QUERY
       
       | 
      reserved | |||
       
        JSON_TABLE
       
       | 
      reserved | |||
       
        JSON_TABLE_PRIMITIVE
       
       | 
      reserved | |||
       
        JSON_VALUE
       
       | 
      reserved | |||
       
        K
       
       | 
      non-reserved | non-reserved | ||
       
        KEEP
       
       | 
      non-reserved | |||
       
        KEY
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        KEYS
       
       | 
      non-reserved | |||
       
        KEY_MEMBER
       
       | 
      non-reserved | non-reserved | ||
       
        KEY_TYPE
       
       | 
      non-reserved | non-reserved | ||
       
        LABEL
       
       | 
      non-reserved | |||
       
        LAG
       
       | 
      reserved | reserved | ||
       
        LANGUAGE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        LARGE
       
       | 
      non-reserved | reserved | reserved | |
       
        LAST
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        LAST_VALUE
       
       | 
      reserved | reserved | ||
       
        LATERAL
       
       | 
      reserved | reserved | reserved | |
       
        LEAD
       
       | 
      reserved | reserved | ||
       
        LEADING
       
       | 
      reserved | reserved | reserved | reserved | 
       
        LEAKPROOF
       
       | 
      non-reserved | |||
       
        LEAST
       
       | 
      non-reserved (cannot be function or type) | |||
       
        LEFT
       
       | 
      reserved (can be function or type) | reserved | reserved | reserved | 
       
        LENGTH
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        LEVEL
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        LIBRARY
       
       | 
      non-reserved | non-reserved | ||
       
        LIKE
       
       | 
      reserved (can be function or type) | reserved | reserved | reserved | 
       
        LIKE_REGEX
       
       | 
      reserved | reserved | ||
       
        LIMIT
       
       | 
      reserved | non-reserved | non-reserved | |
       
        LINK
       
       | 
      non-reserved | non-reserved | ||
       
        LISTAGG
       
       | 
      reserved | |||
       
        LISTEN
       
       | 
      non-reserved | |||
       
        LN
       
       | 
      reserved | reserved | ||
       
        LOAD
       
       | 
      non-reserved | |||
       
        LOCAL
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        LOCALTIME
       
       | 
      reserved | reserved | reserved | |
       
        LOCALTIMESTAMP
       
       | 
      reserved | reserved | reserved | |
       
        LOCATION
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        LOCATOR
       
       | 
      non-reserved | non-reserved | ||
       
        LOCK
       
       | 
      non-reserved | |||
       
        LOCKED
       
       | 
      non-reserved | |||
       
        LOG
       
       | 
      reserved | |||
       
        LOG10
       
       | 
      reserved | |||
       
        LOGGED
       
       | 
      non-reserved | |||
       
        LOWER
       
       | 
      reserved | reserved | reserved | |
       
        M
       
       | 
      non-reserved | non-reserved | ||
       
        MAP
       
       | 
      non-reserved | non-reserved | ||
       
        MAPPING
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        MATCH
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        MATCHED
       
       | 
      non-reserved | non-reserved | ||
       
        MATCHES
       
       | 
      reserved | |||
       
        MATCH_NUMBER
       
       | 
      reserved | |||
       
        MATCH_RECOGNIZE
       
       | 
      reserved | |||
       
        MATERIALIZED
       
       | 
      non-reserved | |||
       
        MAX
       
       | 
      reserved | reserved | reserved | |
       
        MAXVALUE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        MEASURES
       
       | 
      reserved | |||
       
        MEMBER
       
       | 
      reserved | reserved | ||
       
        MERGE
       
       | 
      reserved | reserved | ||
       
        MESSAGE_LENGTH
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        MESSAGE_OCTET_LENGTH
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        MESSAGE_TEXT
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        METHOD
       
       | 
      non-reserved | reserved | reserved | |
       
        MIN
       
       | 
      reserved | reserved | reserved | |
       
        MINUTE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        MINVALUE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        MOD
       
       | 
      reserved | reserved | ||
       
        MODE
       
       | 
      non-reserved | |||
       
        MODIFIES
       
       | 
      reserved | reserved | ||
       
        MODULE
       
       | 
      reserved | reserved | reserved | |
       
        MONTH
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        MORE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        MOVE
       
       | 
      non-reserved | |||
       
        MULTISET
       
       | 
      reserved | reserved | ||
       
        MUMPS
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        NAME
       
       | 
      non-reserved | non-reserved | non-reserved | non-reserved | 
       
        NAMES
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        NAMESPACE
       
       | 
      non-reserved | non-reserved | ||
       
        NATIONAL
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        NATURAL
       
       | 
      reserved (can be function or type) | reserved | reserved | reserved | 
       
        NCHAR
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        NCLOB
       
       | 
      reserved | reserved | ||
       
        NESTED
       
       | 
      non-reserved | |||
       
        NESTING
       
       | 
      non-reserved | non-reserved | ||
       
        NEW
       
       | 
      non-reserved | reserved | reserved | |
       
        NEXT
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        NFC
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        NFD
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        NFKC
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        NFKD
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        NIL
       
       | 
      non-reserved | non-reserved | ||
       
        NO
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        NONE
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        NORMALIZE
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        NORMALIZED
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        NOT
       
       | 
      reserved | reserved | reserved | reserved | 
       
        NOTHING
       
       | 
      non-reserved | |||
       
        NOTIFY
       
       | 
      non-reserved | |||
       
        NOTNULL
       
       | 
      reserved (can be function or type) | |||
       
        NOWAIT
       
       | 
      non-reserved | |||
       
        NTH_VALUE
       
       | 
      reserved | reserved | ||
       
        NTILE
       
       | 
      reserved | reserved | ||
       
        NULL
       
       | 
      reserved | reserved | reserved | reserved | 
       
        NULLABLE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        NULLIF
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        NULLS
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        NUMBER
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        NUMERIC
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        OBJECT
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        OCCURRENCES_REGEX
       
       | 
      reserved | reserved | ||
       
        OCTETS
       
       | 
      non-reserved | non-reserved | ||
       
        OCTET_LENGTH
       
       | 
      reserved | reserved | reserved | |
       
        OF
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        OFF
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        OFFSET
       
       | 
      reserved | reserved | reserved | |
       
        OIDS
       
       | 
      non-reserved | |||
       
        OLD
       
       | 
      non-reserved | reserved | reserved | |
       
        OMIT
       
       | 
      reserved | |||
       
        ON
       
       | 
      reserved | reserved | reserved | reserved | 
       
        ONE
       
       | 
      reserved | |||
       
        ONLY
       
       | 
      reserved | reserved | reserved | reserved | 
       
        OPEN
       
       | 
      reserved | reserved | reserved | |
       
        OPERATOR
       
       | 
      non-reserved | |||
       
        OPTION
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        OPTIONS
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        OR
       
       | 
      reserved | reserved | reserved | reserved | 
       
        ORDER
       
       | 
      reserved | reserved | reserved | reserved | 
       
        ORDERING
       
       | 
      non-reserved | non-reserved | ||
       
        ORDINALITY
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        OTHERS
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        OUT
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        OUTER
       
       | 
      reserved (can be function or type) | reserved | reserved | reserved | 
       
        OUTPUT
       
       | 
      non-reserved | non-reserved | reserved | |
       
        OVER
       
       | 
      non-reserved | reserved | reserved | |
       
        OVERFLOW
       
       | 
      non-reserved | |||
       
        OVERLAPS
       
       | 
      reserved (can be function or type) | reserved | reserved | reserved | 
       
        OVERLAY
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        OVERRIDING
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        OWNED
       
       | 
      non-reserved | |||
       
        OWNER
       
       | 
      non-reserved | |||
       
        P
       
       | 
      non-reserved | non-reserved | ||
       
        PAD
       
       | 
      non-reserved | non-reserved | reserved | |
       
        PARALLEL
       
       | 
      non-reserved | |||
       
        PARAMETER
       
       | 
      reserved | reserved | ||
       
        PARAMETER_MODE
       
       | 
      non-reserved | non-reserved | ||
       
        PARAMETER_NAME
       
       | 
      non-reserved | non-reserved | ||
       
        PARAMETER_ ORDINAL_ POSITION
       
       | 
      non-reserved | non-reserved | ||
       
        PARAMETER_ SPECIFIC_ CATALOG
       
       | 
      non-reserved | non-reserved | ||
       
        PARAMETER_ SPECIFIC_ NAME
       
       | 
      non-reserved | non-reserved | ||
       
        PARAMETER_ SPECIFIC_ SCHEMA
       
       | 
      non-reserved | non-reserved | ||
       
        PARSER
       
       | 
      non-reserved | |||
       
        PARTIAL
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        PARTITION
       
       | 
      non-reserved | reserved | reserved | |
       
        PASCAL
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        PASS
       
       | 
      non-reserved | |||
       
        PASSING
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        PASSTHROUGH
       
       | 
      non-reserved | non-reserved | ||
       
        PASSWORD
       
       | 
      non-reserved | |||
       
        PAST
       
       | 
      non-reserved | |||
       
        PATH
       
       | 
      non-reserved | non-reserved | ||
       
        PATTERN
       
       | 
      reserved | |||
       
        PER
       
       | 
      reserved | |||
       
        PERCENT
       
       | 
      reserved | reserved | ||
       
        PERCENTILE_CONT
       
       | 
      reserved | reserved | ||
       
        PERCENTILE_DISC
       
       | 
      reserved | reserved | ||
       
        PERCENT_RANK
       
       | 
      reserved | reserved | ||
       
        PERIOD
       
       | 
      reserved | reserved | ||
       
        PERMISSION
       
       | 
      non-reserved | non-reserved | ||
       
        PERMUTE
       
       | 
      reserved | |||
       
        PLACING
       
       | 
      reserved | non-reserved | non-reserved | |
       
        PLAN
       
       | 
      non-reserved | |||
       
        PLANS
       
       | 
      non-reserved | |||
       
        PLI
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        POLICY
       
       | 
      non-reserved | |||
       
        PORTION
       
       | 
      reserved | reserved | ||
       
        POSITION
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        POSITION_REGEX
       
       | 
      reserved | reserved | ||
       
        POWER
       
       | 
      reserved | reserved | ||
       
        PRECEDES
       
       | 
      reserved | reserved | ||
       
        PRECEDING
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        PRECISION
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        PREPARE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        PREPARED
       
       | 
      non-reserved | |||
       
        PRESERVE
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        PRIMARY
       
       | 
      reserved | reserved | reserved | reserved | 
       
        PRIOR
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        PRIVATE
       
       | 
      non-reserved | |||
       
        PRIVILEGES
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        PROCEDURAL
       
       | 
      non-reserved | |||
       
        PROCEDURE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        PROCEDURES
       
       | 
      non-reserved | |||
       
        PROGRAM
       
       | 
      non-reserved | |||
       
        PRUNE
       
       | 
      non-reserved | |||
       
        PTF
       
       | 
      reserved | |||
       
        PUBLIC
       
       | 
      non-reserved | non-reserved | reserved | |
       
        PUBLICATION
       
       | 
      non-reserved | |||
       
        QUOTE
       
       | 
      non-reserved | |||
       
        QUOTES
       
       | 
      non-reserved | |||
       
        RANGE
       
       | 
      non-reserved | reserved | reserved | |
       
        RANK
       
       | 
      reserved | reserved | ||
       
        READ
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        READS
       
       | 
      reserved | reserved | ||
       
        REAL
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        REASSIGN
       
       | 
      non-reserved | |||
       
        RECHECK
       
       | 
      non-reserved | |||
       
        RECOVERY
       
       | 
      non-reserved | non-reserved | ||
       
        RECURSIVE
       
       | 
      non-reserved | reserved | reserved | |
       
        REF
       
       | 
      non-reserved | reserved | reserved | |
       
        REFERENCES
       
       | 
      reserved | reserved | reserved | reserved | 
       
        REFERENCING
       
       | 
      non-reserved | reserved | reserved | |
       
        REFRESH
       
       | 
      non-reserved | |||
       
        REGR_AVGX
       
       | 
      reserved | reserved | ||
       
        REGR_AVGY
       
       | 
      reserved | reserved | ||
       
        REGR_COUNT
       
       | 
      reserved | reserved | ||
       
        REGR_INTERCEPT
       
       | 
      reserved | reserved | ||
       
        REGR_R2
       
       | 
      reserved | reserved | ||
       
        REGR_SLOPE
       
       | 
      reserved | reserved | ||
       
        REGR_SXX
       
       | 
      reserved | reserved | ||
       
        REGR_SXY
       
       | 
      reserved | reserved | ||
       
        REGR_SYY
       
       | 
      reserved | reserved | ||
       
        REINDEX
       
       | 
      non-reserved | |||
       
        RELATIVE
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        RELEASE
       
       | 
      non-reserved | reserved | reserved | |
       
        RENAME
       
       | 
      non-reserved | |||
       
        REPEATABLE
       
       | 
      non-reserved | non-reserved | non-reserved | non-reserved | 
       
        REPLACE
       
       | 
      non-reserved | |||
       
        REPLICA
       
       | 
      non-reserved | |||
       
        REQUIRING
       
       | 
      non-reserved | non-reserved | ||
       
        RESET
       
       | 
      non-reserved | |||
       
        RESPECT
       
       | 
      non-reserved | non-reserved | ||
       
        RESTART
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        RESTORE
       
       | 
      non-reserved | non-reserved | ||
       
        RESTRICT
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        RESULT
       
       | 
      reserved | reserved | ||
       
        RETURN
       
       | 
      reserved | reserved | ||
       
        RETURNED_CARDINALITY
       
       | 
      non-reserved | non-reserved | ||
       
        RETURNED_LENGTH
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        RETURNED_ OCTET_ LENGTH
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        RETURNED_SQLSTATE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        RETURNING
       
       | 
      reserved | non-reserved | non-reserved | |
       
        RETURNS
       
       | 
      non-reserved | reserved | reserved | |
       
        REVOKE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        RIGHT
       
       | 
      reserved (can be function or type) | reserved | reserved | reserved | 
       
        ROLE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        ROLLBACK
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        ROLLUP
       
       | 
      non-reserved | reserved | reserved | |
       
        ROUTINE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        ROUTINES
       
       | 
      non-reserved | |||
       
        ROUTINE_CATALOG
       
       | 
      non-reserved | non-reserved | ||
       
        ROUTINE_NAME
       
       | 
      non-reserved | non-reserved | ||
       
        ROUTINE_SCHEMA
       
       | 
      non-reserved | non-reserved | ||
       
        ROW
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        ROWS
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        ROW_COUNT
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        ROW_NUMBER
       
       | 
      reserved | reserved | ||
       
        RULE
       
       | 
      non-reserved | |||
       
        RUNNING
       
       | 
      reserved | |||
       
        SAVEPOINT
       
       | 
      non-reserved | reserved | reserved | |
       
        SCALAR
       
       | 
      non-reserved | |||
       
        SCALE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        SCHEMA
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        SCHEMAS
       
       | 
      non-reserved | |||
       
        SCHEMA_NAME
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        SCOPE
       
       | 
      reserved | reserved | ||
       
        SCOPE_CATALOG
       
       | 
      non-reserved | non-reserved | ||
       
        SCOPE_NAME
       
       | 
      non-reserved | non-reserved | ||
       
        SCOPE_SCHEMA
       
       | 
      non-reserved | non-reserved | ||
       
        SCROLL
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        SEARCH
       
       | 
      non-reserved | reserved | reserved | |
       
        SECOND
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        SECTION
       
       | 
      non-reserved | non-reserved | reserved | |
       
        SECURITY
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        SEEK
       
       | 
      reserved | |||
       
        SELECT
       
       | 
      reserved | reserved | reserved | reserved | 
       
        SELECTIVE
       
       | 
      non-reserved | non-reserved | ||
       
        SELF
       
       | 
      non-reserved | non-reserved | ||
       
        SENSITIVE
       
       | 
      reserved | reserved | ||
       
        SEQUENCE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        SEQUENCES
       
       | 
      non-reserved | |||
       
        SERIALIZABLE
       
       | 
      non-reserved | non-reserved | non-reserved | non-reserved | 
       
        SERVER
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        SERVER_NAME
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        SESSION
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        SESSION_USER
       
       | 
      reserved | reserved | reserved | reserved | 
       
        SET
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        SETOF
       
       | 
      non-reserved (cannot be function or type) | |||
       
        SETS
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        SHARE
       
       | 
      non-reserved | |||
       
        SHOW
       
       | 
      non-reserved | reserved | ||
       
        SIMILAR
       
       | 
      reserved (can be function or type) | reserved | reserved | |
       
        SIMPLE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        SIN
       
       | 
      reserved | |||
       
        SINH
       
       | 
      reserved | |||
       
        SIZE
       
       | 
      non-reserved | non-reserved | reserved | |
       
        SKIP
       
       | 
      non-reserved | reserved | ||
       
        SMALLINT
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        SNAPSHOT
       
       | 
      non-reserved | |||
       
        SOME
       
       | 
      reserved | reserved | reserved | reserved | 
       
        SOURCE
       
       | 
      non-reserved | non-reserved | ||
       
        SPACE
       
       | 
      non-reserved | non-reserved | reserved | |
       
        SPECIFIC
       
       | 
      reserved | reserved | ||
       
        SPECIFICTYPE
       
       | 
      reserved | reserved | ||
       
        SPECIFIC_NAME
       
       | 
      non-reserved | non-reserved | ||
       
        SQL
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        SQLCODE
       
       | 
      reserved | |||
       
        SQLERROR
       
       | 
      reserved | |||
       
        SQLEXCEPTION
       
       | 
      reserved | reserved | ||
       
        SQLSTATE
       
       | 
      reserved | reserved | reserved | |
       
        SQLWARNING
       
       | 
      reserved | reserved | ||
       
        SQRT
       
       | 
      reserved | reserved | ||
       
        STABLE
       
       | 
      non-reserved | |||
       
        STANDALONE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        START
       
       | 
      non-reserved | reserved | reserved | |
       
        STATE
       
       | 
      non-reserved | non-reserved | ||
       
        STATEMENT
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        STATIC
       
       | 
      reserved | reserved | ||
       
        STATISTICS
       
       | 
      non-reserved | |||
       
        STDDEV_POP
       
       | 
      reserved | reserved | ||
       
        STDDEV_SAMP
       
       | 
      reserved | reserved | ||
       
        STDIN
       
       | 
      non-reserved | |||
       
        STDOUT
       
       | 
      non-reserved | |||
       
        STORAGE
       
       | 
      non-reserved | |||
       
        STORED
       
       | 
      non-reserved | |||
       
        STRICT
       
       | 
      non-reserved | |||
       
        STRING
       
       | 
      non-reserved | |||
       
        STRIP
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        STRUCTURE
       
       | 
      non-reserved | non-reserved | ||
       
        STYLE
       
       | 
      non-reserved | non-reserved | ||
       
        SUBCLASS_ORIGIN
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        SUBMULTISET
       
       | 
      reserved | reserved | ||
       
        SUBSCRIPTION
       
       | 
      non-reserved | |||
       
        SUBSET
       
       | 
      reserved | |||
       
        SUBSTRING
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        SUBSTRING_REGEX
       
       | 
      reserved | reserved | ||
       
        SUCCEEDS
       
       | 
      reserved | reserved | ||
       
        SUM
       
       | 
      reserved | reserved | reserved | |
       
        SUPPORT
       
       | 
      non-reserved | |||
       
        SYMMETRIC
       
       | 
      reserved | reserved | reserved | |
       
        SYSID
       
       | 
      non-reserved | |||
       
        SYSTEM
       
       | 
      non-reserved | reserved | reserved | |
       
        SYSTEM_TIME
       
       | 
      reserved | reserved | ||
       
        SYSTEM_USER
       
       | 
      reserved | reserved | reserved | |
       
        T
       
       | 
      non-reserved | non-reserved | ||
       
        TABLE
       
       | 
      reserved | reserved | reserved | reserved | 
       
        TABLES
       
       | 
      non-reserved | |||
       
        TABLESAMPLE
       
       | 
      reserved (can be function or type) | reserved | reserved | |
       
        TABLESPACE
       
       | 
      non-reserved | |||
       
        TABLE_NAME
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        TAN
       
       | 
      reserved | |||
       
        TANH
       
       | 
      reserved | |||
       
        TEMP
       
       | 
      non-reserved | |||
       
        TEMPLATE
       
       | 
      non-reserved | |||
       
        TEMPORARY
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        TEXT
       
       | 
      non-reserved | |||
       
        THEN
       
       | 
      reserved | reserved | reserved | reserved | 
       
        THROUGH
       
       | 
      non-reserved | |||
       
        TIES
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        TIME
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        TIMESTAMP
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        TIMEZONE_HOUR
       
       | 
      reserved | reserved | reserved | |
       
        TIMEZONE_MINUTE
       
       | 
      reserved | reserved | reserved | |
       
        TO
       
       | 
      reserved | reserved | reserved | reserved | 
       
        TOKEN
       
       | 
      non-reserved | non-reserved | ||
       
        TOP_LEVEL_COUNT
       
       | 
      non-reserved | non-reserved | ||
       
        TRAILING
       
       | 
      reserved | reserved | reserved | reserved | 
       
        TRANSACTION
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        TRANSACTIONS_ COMMITTED
       
       | 
      non-reserved | non-reserved | ||
       
        TRANSACTIONS_ ROLLED_ BACK
       
       | 
      non-reserved | non-reserved | ||
       
        TRANSACTION_ACTIVE
       
       | 
      non-reserved | non-reserved | ||
       
        TRANSFORM
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        TRANSFORMS
       
       | 
      non-reserved | non-reserved | ||
       
        TRANSLATE
       
       | 
      reserved | reserved | reserved | |
       
        TRANSLATE_REGEX
       
       | 
      reserved | reserved | ||
       
        TRANSLATION
       
       | 
      reserved | reserved | reserved | |
       
        TREAT
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        TRIGGER
       
       | 
      non-reserved | reserved | reserved | |
       
        TRIGGER_CATALOG
       
       | 
      non-reserved | non-reserved | ||
       
        TRIGGER_NAME
       
       | 
      non-reserved | non-reserved | ||
       
        TRIGGER_SCHEMA
       
       | 
      non-reserved | non-reserved | ||
       
        TRIM
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        TRIM_ARRAY
       
       | 
      reserved | reserved | ||
       
        TRUE
       
       | 
      reserved | reserved | reserved | reserved | 
       
        TRUNCATE
       
       | 
      non-reserved | reserved | reserved | |
       
        TRUSTED
       
       | 
      non-reserved | |||
       
        TYPE
       
       | 
      non-reserved | non-reserved | non-reserved | non-reserved | 
       
        TYPES
       
       | 
      non-reserved | |||
       
        UESCAPE
       
       | 
      non-reserved | reserved | reserved | |
       
        UNBOUNDED
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        UNCOMMITTED
       
       | 
      non-reserved | non-reserved | non-reserved | non-reserved | 
       
        UNCONDITIONAL
       
       | 
      non-reserved | |||
       
        UNDER
       
       | 
      non-reserved | non-reserved | ||
       
        UNENCRYPTED
       
       | 
      non-reserved | |||
       
        UNION
       
       | 
      reserved | reserved | reserved | reserved | 
       
        UNIQUE
       
       | 
      reserved | reserved | reserved | reserved | 
       
        UNKNOWN
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        UNLINK
       
       | 
      non-reserved | non-reserved | ||
       
        UNLISTEN
       
       | 
      non-reserved | |||
       
        UNLOGGED
       
       | 
      non-reserved | |||
       
        UNMATCHED
       
       | 
      reserved | |||
       
        UNNAMED
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        UNNEST
       
       | 
      reserved | reserved | ||
       
        UNTIL
       
       | 
      non-reserved | |||
       
        UNTYPED
       
       | 
      non-reserved | non-reserved | ||
       
        UPDATE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        UPPER
       
       | 
      reserved | reserved | reserved | |
       
        URI
       
       | 
      non-reserved | non-reserved | ||
       
        USAGE
       
       | 
      non-reserved | non-reserved | reserved | |
       
        USER
       
       | 
      reserved | reserved | reserved | reserved | 
       
        USER_ DEFINED_ TYPE_ CATALOG
       
       | 
      non-reserved | non-reserved | ||
       
        USER_ DEFINED_ TYPE_ CODE
       
       | 
      non-reserved | non-reserved | ||
       
        USER_ DEFINED_ TYPE_ NAME
       
       | 
      non-reserved | non-reserved | ||
       
        USER_ DEFINED_ TYPE_ SCHEMA
       
       | 
      non-reserved | non-reserved | ||
       
        USING
       
       | 
      reserved | reserved | reserved | reserved | 
       
        UTF16
       
       | 
      non-reserved | |||
       
        UTF32
       
       | 
      non-reserved | |||
       
        UTF8
       
       | 
      non-reserved | |||
       
        VACUUM
       
       | 
      non-reserved | |||
       
        VALID
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        VALIDATE
       
       | 
      non-reserved | |||
       
        VALIDATOR
       
       | 
      non-reserved | |||
       
        VALUE
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        VALUES
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        VALUE_OF
       
       | 
      reserved | reserved | ||
       
        VARBINARY
       
       | 
      reserved | reserved | ||
       
        VARCHAR
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | reserved | 
       
        VARIADIC
       
       | 
      reserved | |||
       
        VARYING
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        VAR_POP
       
       | 
      reserved | reserved | ||
       
        VAR_SAMP
       
       | 
      reserved | reserved | ||
       
        VERBOSE
       
       | 
      reserved (can be function or type) | |||
       
        VERSION
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        VERSIONING
       
       | 
      reserved | reserved | ||
       
        VIEW
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        VIEWS
       
       | 
      non-reserved | |||
       
        VOLATILE
       
       | 
      non-reserved | |||
       
        WHEN
       
       | 
      reserved | reserved | reserved | reserved | 
       
        WHENEVER
       
       | 
      reserved | reserved | reserved | |
       
        WHERE
       
       | 
      reserved | reserved | reserved | reserved | 
       
        WHITESPACE
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        WIDTH_BUCKET
       
       | 
      reserved | reserved | ||
       
        WINDOW
       
       | 
      reserved | reserved | reserved | |
       
        WITH
       
       | 
      reserved | reserved | reserved | reserved | 
       
        WITHIN
       
       | 
      non-reserved | reserved | reserved | |
       
        WITHOUT
       
       | 
      non-reserved | reserved | reserved | |
       
        WORK
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        WRAPPER
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        WRITE
       
       | 
      non-reserved | non-reserved | non-reserved | reserved | 
       
        XML
       
       | 
      non-reserved | reserved | reserved | |
       
        XMLAGG
       
       | 
      reserved | reserved | ||
       
        XMLATTRIBUTES
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        XMLBINARY
       
       | 
      reserved | reserved | ||
       
        XMLCAST
       
       | 
      reserved | reserved | ||
       
        XMLCOMMENT
       
       | 
      reserved | reserved | ||
       
        XMLCONCAT
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        XMLDECLARATION
       
       | 
      non-reserved | non-reserved | ||
       
        XMLDOCUMENT
       
       | 
      reserved | reserved | ||
       
        XMLELEMENT
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        XMLEXISTS
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        XMLFOREST
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        XMLITERATE
       
       | 
      reserved | reserved | ||
       
        XMLNAMESPACES
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        XMLPARSE
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        XMLPI
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        XMLQUERY
       
       | 
      reserved | reserved | ||
       
        XMLROOT
       
       | 
      non-reserved (cannot be function or type) | |||
       
        XMLSCHEMA
       
       | 
      non-reserved | non-reserved | ||
       
        XMLSERIALIZE
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        XMLTABLE
       
       | 
      non-reserved (cannot be function or type) | reserved | reserved | |
       
        XMLTEXT
       
       | 
      reserved | reserved | ||
       
        XMLVALIDATE
       
       | 
      reserved | reserved | ||
       
        YEAR
       
       | 
      non-reserved | reserved | reserved | reserved | 
       
        YES
       
       | 
      non-reserved | non-reserved | non-reserved | |
       
        ZONE
       
       | 
      non-reserved | non-reserved | non-reserved | reserved |