tidb: Add ENGINE_ATTRIBUTE table option (#20148)

Author: pingyu

sql-statements/sql-statement-create-table.md

@@ -109,7 +109,7 @@ TableOption ::=
     PartDefOption
 |   DefaultKwdOpt ( CharsetKw EqOpt CharsetName | 'COLLATE' EqOpt CollationName )
 |   ( 'AUTO_INCREMENT' | 'AUTO_ID_CACHE' | 'AUTO_RANDOM_BASE' | 'AVG_ROW_LENGTH' | 'CHECKSUM' | 'TABLE_CHECKSUM' | 'KEY_BLOCK_SIZE' | 'DELAY_KEY_WRITE' | 'SHARD_ROW_ID_BITS' | 'PRE_SPLIT_REGIONS' ) EqOpt LengthNum
-|   ( 'CONNECTION' | 'PASSWORD' | 'COMPRESSION' ) EqOpt stringLit
+|   ( 'CONNECTION' | 'ENGINE_ATTRIBUTE' | 'PASSWORD' | 'COMPRESSION' ) EqOpt stringLit
 |   RowFormat
 |   ( 'STATS_PERSISTENT' | 'PACK_KEYS' ) EqOpt StatsPersistentVal
 |   ( 'STATS_AUTO_RECALC' | 'STATS_SAMPLE_PAGES' ) EqOpt ( LengthNum | 'DEFAULT' )
@@ -128,7 +128,7 @@ PlacementPolicyOption ::=
 |   "PLACEMENT" "POLICY" (EqOpt | "SET") "DEFAULT"
 ```
 
-The following *table_options* are supported. Other options such as `AVG_ROW_LENGTH`, `CHECKSUM`, `COMPRESSION`, `CONNECTION`, `DELAY_KEY_WRITE`, `ENGINE`, `KEY_BLOCK_SIZE`, `MAX_ROWS`, `MIN_ROWS`, `ROW_FORMAT` and `STATS_PERSISTENT` are parsed but ignored.
+The following *table_options* are supported. Other options such as `AVG_ROW_LENGTH`, `CHECKSUM`, `COMPRESSION`, `CONNECTION`, `DELAY_KEY_WRITE`, `ENGINE`, `KEY_BLOCK_SIZE`, `MAX_ROWS`, `MIN_ROWS`, `ROW_FORMAT` and `STATS_PERSISTENT` are parsed but ignored. `ENGINE_ATTRIBUTE` is parsed but always returns the `ERROR 3981 (HY000): Storage engine does not support ENGINE_ATTRIBUTE` error. This option is reserved for future use.
 
 | Options | Description | Example |
 | ---------- | ---------- | ------- |