Amazon Redshift 將不再支援從修補程式 198 開始建立新的 Python UDFs。現有 Python UDF 將繼續正常運作至 2026 年 6 月 30 日。如需詳細資訊，請參閱[部落格文章](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/)。

本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

# 保留字
<a name="r_pg_keywords"></a>

以下是 Amazon Redshift 保留字的清單。您可將保留字用於分隔的分隔識別碼 (雙引號)。

**注意**  
雖然 START 和 CONNECT 不是保留字，但如果您在查詢中使用 START 和 CONNECT 做為資料表別名，請使用分隔識別碼或 AS，以避免在執行期失敗。

如需更多詳細資訊，請參閱 [名稱與識別碼](r_names.md)。

```
AES128
AES256
ALL
ALLOWOVERWRITE
ANALYSE
ANALYZE
AND
ANY
ARRAY
AS
ASC
AUTHORIZATION
AZ64
BACKUP
BETWEEN
BINARY
BLANKSASNULL
BOTH
BYTEDICT
BZIP2
CASE
CAST
CHECK
COLLATE
COLUMN
CONSTRAINT
CREATE
CREDENTIALS
CROSS
CURRENT_DATE
CURRENT_TIME
CURRENT_TIMESTAMP
CURRENT_USER
CURRENT_USER_ID
DEFAULT
DEFERRABLE
DEFLATE
DEFRAG
DELTA
DELTA32K
DESC
DISABLE
DISTINCT
DO
ELSE
EMPTYASNULL
ENABLE
ENCODE
ENCRYPT     
ENCRYPTION
END
EXCEPT
EXPLICIT
FALSE
FOR
FOREIGN
FREEZE
FROM
FULL
GLOBALDICT256
GLOBALDICT64K
GRANT
GROUP
GZIP
HAVING
IDENTITY
IGNORE
ILIKE
IN
INITIALLY
INNER
INTERSECT
INTERVAL
INTO
IS
ISNULL
JOIN
LEADING
LEFT
LIKE
LIMIT
LOCALTIME
LOCALTIMESTAMP
LUN
LUNS
LZO
LZOP
MINUS
MOSTLY16
MOSTLY32
MOSTLY8
NATURAL
NEW
NOT
NOTNULL
NULL
NULLS
OFF
OFFLINE
OFFSET
OID
OLD
ON
ONLY
OPEN
OR
ORDER
OUTER
OVERLAPS
PARALLEL
PARTITION
PERCENT
PERMISSIONS
PIVOT
PLACING
PRIMARY
RAW
READRATIO
RECOVER
REFERENCES
REJECTLOG
RESORT
RESPECT
RESTORE
RIGHT
SELECT
SESSION_USER
SIMILAR
SNAPSHOT 
SOME
SYSDATE
SYSTEM
TABLE
TAG
TDES
TEXT255
TEXT32K
THEN
TIMESTAMP
TO
TOP
TRAILING
TRUE
TRUNCATECOLUMNS
UNION
UNIQUE
UNNEST
UNPIVOT
USER
USING
VERBOSE
WALLET
WHEN
WHERE
WITH
WITHOUT
```