Flink SQL reserves some strings as keywords. If you want to use the following strings as field names, ensure that they are enclosed by back quotes, for example, `value` and `count`.

A

A
ABS
ABSOLUTE
ACTION
ADA
ADD
ADMIN
AFTER
AK
ALL
ALLOCATE
ALLOW
ALTER
ALWAYS
AND
ANY
APPEND
APP_ID
ARE
ARRAY
ARRAY_BRACKET
AS
ASC
ASENSITIVE
ASSERTION
ASSIGNMENT
ASYMMETRIC
AT
AT_LEAST_ONCE
ATOMIC
ATTRIBUTE
ATTRIBUTES
AUTHORIZATION
AVG
AVRO_CONFIG
AVRO_DATA
AVRO_SCHEMA

B

BATCH_INSERT_DATA_NUM
BEFORE
BEGIN
BERNOULLI
BETWEEN
BIGINT
BINARY
BIT
BLOB
BOOL
BOOLEAN
BOTH
BREADTH
BUCKET
BY

C

C
CACHE_MAX_NUM
CACHE_TIME
CALL
CALLED
CARDINALITY
CASCADE
CASCADED
CASE
CAST
CATALOG
CATALOG_NAME
CEIL
CEILING
CENTURY
CHAIN
CHANNEL
CHAR
CHARACTER
CHARACTERISTICTS
CHARACTERS
CHARACTER_LENGTH
CHARACTER_SET_CATALOG
CHARACTER_SET_NAME
CHARACTER_SET_SCHEMA
CHAR_LENGTH
CHECK
CHECKPOINT_APP_NAME
CHECKPOINT_INTERVAL
CHECKPOINTINTERVAL
CLASS_ORIGIN
CLOB
CLOSE
CLUSTER_ADDRESS
CLUSTER_ID
CLUSTER_NAME
COALESCE
COBOL
COLLATE
COLLATION
COLLATION_CATALOG
COLLATION_NAME
COLLATION_SCHEMA
COLLECT
COLUMN
COLUMN_NAME
COLUMN_NAME_MAP
COMMAND_FUNCTION
COMMAND_FUNCTION_CODE
COMMIT
COMMITTED
CONDITION
CONDITION_NUMBER
CONFIGURATION
CONFLUENT_CERTIFICATE_NAME
CONFLUENT_PROPERTIES
CONFLUENT_SCHEMA_FIELD
CONFLUENT_URL
CONNECT
CONNECTION_NAME
CONSTRAINT
CONSTRAINTS
CONSTRAINT_CATALOG
CONSTRAINT_NAME
CONSTRAINT_SCHEMA
CONSTRUCTOR
CONTAINS
CONTINUE
CONVERT
CORR
CORRESPONDING
COUNT
COVAR_POP
COVAR_SAMP
CREATE
CREATE_IF_NOT_EXIST
CROSS
CUBE
CUME_DIST
CURRENT
CURRENT_CATALOG
CURRENT_DATE
CURRENT_DEFAULT_TRANSFORM_GROUP
CURRENT_PATH
CURRENT_ROLE
CURRENT_SCHEMA
CURRENT_TIMESTAMP
CURRENT_TRANSFORM_GROUP_FOR_TYPE
CURRENT_USER
CURSOR
CURSOR_NAME
CYCLE

D

DATE
DATABASE
DATE
DATETIME_INTERVAL_CODE
DATETIME_INTERVAL_PRECISION
DAY
DB_COLUMNS
DB_URL
DB_OBS_SERVER
DB_TYPE
DEALLOCATE
DEC
DECADE
DECIMAL
DECLARE
DEFAULTS
DEFERRABLE
DEFERRED
DEFINER
DEGREE
DELETE
DELETE_OBS_TEMP_FILE
DENSE_RANK
DEPTH
DEREF
DERIVED
DESC
DESCRIBE
DESCRIPTION
DESCRIPTOR
DETERMINISTIC
DIAGNOSTICS
DISALLOW
DISCONNECT
DIS_NOTICE_CHANNEL
DISPATCH
DISTINCT
DOMAIN
DOUBLE
DOW
DOY
DRIVER
DROP
DUMP_INTERVAL
DYNAMIC
DYNAMIC_FUNCTION
DYNAMIC_FUNCTION_CODE

E

EACH
ELEMENT
ELSE
EMAIL_KEY
ENABLECHECKPOINT
ENABLE_CHECKPOINT
ENABLE_OUTPUT_NULL
ENCODE
ENCODE_CLASS_NAME
ENCODE_CLASS_PARAMETER
ENCODED_DATA
END
ENDPOINT
END_EXEC
EPOCH
EQUALS
ESCAPE
ES_FIELDS
ES_INDEX
ES_TYPE
ESTIMATEMEM
ESTIMATEPARALLELISM
EXACTLY_ONCE
EXCEPT
EXCEPTION
EXCLUDE
EXCLUDING
EXEC
EXECUTE
EXISTS
EXP
EXPLAIN
EXTEND
EXTERNAL
EXTRACT
EVERY

F

FALSE
FETCH
FIELD_DELIMITER
FIELD_NAMES
FILE_PREFIX
FILTER
FINAL
FIRST
FIRST_VALUE
FLOAT
FLOOR
FOLLOWING
FOR
FUNCTION
FOREIGN
FORTRAN
FOUND
FRAC_SECOND
FREE
FROM
FULL
FUSION

G

G
GENERAL
GENERATED
GET
GLOBAL
GO
GOTO
GRANT
GRANTED
GROUP
GROUPING
GW_URL

H

HASH_KEY_COLUMN
HAVING
HIERARCHY
HOLD
HOUR
HTTPS_PORT

I

IDENTITY
ILLEGAL_DATA_TABLE
IMMEDIATE
IMPLEMENTATION
IMPORT
IN
INCLUDING
INCREMENT
INDICATOR
INITIALLY
INNER
INOUT
INPUT
INSENSITIVE
INSERT
INSTANCE
INSTANTIABLE
INT
INTEGER
INTERSECT
INTERSECTION
INTERVAL
INTO
INVOKER
IN_WITH_SCHEMA
IS
ISOLATION

J

JAVA
JOIN
JSON_CONFIG
JSON_SCHEMA

K

K
KAFKA_BOOTSTRAP_SERVERS
KAFKA_CERTIFICATE_NAME
KAFKA_GROUP_ID
KAFKA_PROPERTIES
KAFKA_PROPERTIES_DELIMITER
KAFKA_TOPIC
KEY
KEY_COLUMN
KEY_MEMBER
KEY_TYPE
KEY_VALUE
KRB_AUTH

L

LABEL
LANGUAGE
LARGE
LAST
LAST_VALUE
LATERAL
LEADING
LEFT
LENGTH
LEVEL
LIBRARY
LIKE
LIMIT
LONG

M

M
MAP
MATCH
MATCHED
MATCHING_COLUMNS
MATCHING_REGEX
MAX
MAXALLOWEDCPU
MAXALLOWEDMEM
MAXALLOWEDPARALLELISM
MAX_DUMP_FILE_NUM
MAX_RECORD_NUM_CACHE
MAX_RECORD_NUM_PER_FILE
MAXVALUE
MEMBER
MERGE
MESSAGE_COLUMN
MESSAGE_LENGTH
MESSAGE_OCTET_LENGTH
MESSAGE_SUBJECT
MESSAGE_TEXT
METHOD
MICROSECOND
MILLENNIUM
MIN
MINUTE
MINVALUE
MOD
MODIFIES
MODULE
MONTH
MORE
MS
MULTISET
MUMPS

N

NAME
NAMES
NATIONAL
NATURAL
NCHAR
NCLOB
NESTING
NEW
NEXT
NO
NONE
NORMALIZE
NORMALIZED
NOT
NULL
NULLABLE
NULLIF
NULLS
NUMBER
NUMERIC

O

OBJECT
OBJECT_NAME
OBS_DIR
OCTETS
OCTET_LENGTH
OF
OFFSET
OLD
ON
ONLY
OPEN
OPERATION_FIELD
OPTION
OPTIONS
OR
ORDER
ORDERING
ORDINALITY
OTHERS
OUT
OUTER
OUTPUT
OVER
OVERLAPS
OVERLAY
OVERRIDING

P

PAD
PARALLELISM
PARAMETER
PARAMETER_MODE
PARAMETER_NAME
PARAMETER_ORDINAL_POSITION
PARAMETER_SPECIFIC_CATALOG
PARAMETER_SPECIFIC_NAME
PARAMETER_SPECIFIC_SCHEMA
PARTIAL
PARTITION
PARTITION_COUNT
PARTITION_KEY
PARTITION_RANGE
PASCAL
PASSTHROUGH
PASSWORD
PATH
PERCENTILE_CONT
PERCENTILE_DISC
PERCENT_RANK
PERSIST_SCHEMA
PIPELINE_ID
PLACING
PLAN
PLI
POSITION
POWER
PRECEDING
PRECISION
PREPARE
PRESERVE
PRIMARY
PRIMARY_KEY
PRIOR
PRIVILEGES
PROCEDURE
PROCTIME
PROJECT_ID
PUBLIC

Q

QUARTER
QUOTE

R

RANGE
RANK
RAW
READ
READS
READ_ONCE
REAL
RECURSIVE
REF
REFERENCES
REFERENCING
REGION
REGR_AVGX
REGR_AVGY
REGR_COUNT
REGR_INTERCEPT
REGR_R2
REGR_SLOPE
REGR_SXX
REGR_SXY
REGR_SYY
RELATIVE
RELEASE
REPEATABLE
RESET
RESTART
RESTRICT
RESULT
RETURN
RETURNED_CARDINALITY
RETURNED_LENGTH
RETURNED_OCTET_LENGTH
RETURNED_SQLSTATE
RETURNS
REVOKE
RIGHT
ROLE
ROLLBACK
ROLLING_INTERVAL
ROLLING_SIZE
ROLLUP
ROUTINE
ROUTINE_CATALOG
ROUTINE_NAME
ROUTINE_SCHEMA
ROW
ROW_COUNT
ROW_DELIMITER
ROW_NUMBER
ROWS
ROWTIME

S

SAVEPOINT
SCALE
SCHEMA
SCHEMA_CASE_SENSITIVE
SCHEMA_NAME
SCOPE
SCOPE_CATALOGS
SCOPE_NAME
SCOPE_SCHEMA
SCROLL
SEARCH
SECOND
SECTION
SECURITY
SELECT
SELF
SENSITIVE
SEQUENCE
SERIALIZABLE
SERVER
SERVER_NAME
SESSION
SESSION_USER
SET
SETS
SIMILAR
SIMPLE
SINK
SIZE
SK
SMALLINT
SOME
SOURCE
SPACE
SPECIFIC
SPECIFICTYPE
SPECIFIC_NAME
SQL
SQLEXCEPTION
SQLSTATE
SQLWARNING
SQL_TSI_DAY
SQL_TSI_FRAC_SECOND
SQL_TSI_HOUR
SQL_TSI_MICROSECOND
SQL_TSI_MINUTE
SQL_TSI_MONTH
SQL_TSI_QUARTER
SQL_TSI_SECOND
SQL_TSI_WEEK
SQL_TSI_YEAR
SQRT
START
START_TIME
STATE
STATEMENT
STATIC
STDDEV_POP
STDDEV_SAMP
STREAM
STRING
STRUCTURE
STYLE
SUBCLASS_ORIGIN
SUBMULTISET
SUBSTITUTE
SUBSTRING
SUM
SYMMETRIC
SYSTEM
SYSTEM_USER

T

TABLE
TABLESAMPLE
TABLE_COLUMNS
TABLE_NAME
TABLE_NAME_MAP
TEMP
TEMPORARY
THEN
TIES
TIME
TIMESTAMP
TIMESTAMPADD
TIMESTAMPDIFF
TIMEZONE_HOUR
TIMEZONE_MINUTE
TINYINT
TO
TOP_LEVEL_COUNT
TOPIC
TOPIC_URN
TRAILING
TRANSACTION
TRANSACTIONAL_TABLE
TRANSACTIONS_ACTIVE
TRANSACTIONS_COMMITTED
TRANSACTIONS_ROLLED_BACK
TRANSFORM
TRANSFORMS
TRANSLATE
TRANSLATION
TRANX_ID
TREAT
TRIGGER
TRIGGER_CATALOG
TRIGGER_NAME
TRIGGER_SCHEMA
TRIM
TRUE
TSDB_LINK_ADDRESS
TSDB_METRICS
TSDB_TIMESTAMPS
TSDB_TAGS
TSDB_VALUES
TYPE
TYPE_CLASS_NAME
TYPE_CLASS_PARAMETER

U

UESCAPE
UNBOUNDED
UNCOMMITTED
UNDER
UNION
UNIQUE
UNKNOWN
UNNAMED
UNNEST
UPDATE
UPPER
UPSERT
URN_COLUMN
USAGE
USER
USER_DEFINED_TYPE_CATALOG
USER_DEFINED_TYPE_CODE
USER_DEFINED_TYPE_NAME
USER_DEFINED_TYPE_SCHEMA
USERNAME
USING

V

VALUE
VALUES
VALUE_TYPE
VARBINARY
VARCHAR
VARYING
VAR_POP
VAR_SAMP
VERSION
VERSION_ID
VIEW

W

WATERMARK
WEEK
WHEN
WHENEVER
WHERE
WIDTH_BUCKET
WINDOW
WITH
WITHIN
WITHOUT
WORK
WRAPPER
WRITE

X

XML
XML_CONFIG

Y

YEAR

Z

ZONE

Reserved Keywords

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z