754f820035
## What changes were proposed in this pull request? Add AL2 license to metadata of all .md files. This seemed to be the tidiest way as it will get ignored by .md renderers and other tools. Attempts to write them as markdown comments revealed that there is no such standard thing. ## How was this patch tested? Doc build Closes #24243 from srowen/SPARK-26918. Authored-by: Sean Owen <sean.owen@databricks.com> Signed-off-by: Sean Owen <sean.owen@databricks.com>
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| layout | title | displayTitle | license |
|---|---|---|---|
| global | Spark SQL Keywords | Spark SQL Keywords | Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. |
When spark.sql.parser.ansi.enabled is true, Spark SQL has two kinds of keywords:
- Reserved keywords: Keywords that are reserved and can't be used as identifiers for table, view, column, function, alias, etc.
- Non-reserved keywords: Keywords that have a special meaning only in particular contexts and can be used as identifiers in other contexts. For example,
SELECT 1 WEEKis an interval literal, but WEEK can be used as identifiers in other places.
When spark.sql.parser.ansi.enabled is false, Spark SQL has two kinds of keywords:
- Non-reserved keywords: Same definition as the one when
spark.sql.parser.ansi.enabled=true. - Strict-non-reserved keywords: A strict version of non-reserved keywords, which can not be used as table alias.
By default spark.sql.parser.ansi.enabled is false.
Below is a list of all the keywords in Spark SQL.
| Keyword | Spark SQL | SQL-2011 | |
|---|---|---|---|
| ANSI mode | default mode | ||
| ADD | non-reserved | non-reserved | non-reserved |
| AFTER | non-reserved | non-reserved | non-reserved |
| ALL | reserved | non-reserved | reserved |
| ALTER | non-reserved | non-reserved | reserved |
| ANALYZE | non-reserved | non-reserved | non-reserved |
| AND | reserved | non-reserved | reserved |
| ANTI | reserved | strict-non-reserved | non-reserved |
| ANY | reserved | non-reserved | reserved |
| ARCHIVE | non-reserved | non-reserved | non-reserved |
| ARRAY | non-reserved | non-reserved | reserved |
| AS | reserved | non-reserved | reserved |
| ASC | non-reserved | non-reserved | non-reserved |
| AT | non-reserved | non-reserved | reserved |
| AUTHORIZATION | reserved | non-reserved | reserved |
| BETWEEN | non-reserved | non-reserved | reserved |
| BOTH | reserved | non-reserved | reserved |
| BUCKET | non-reserved | non-reserved | non-reserved |
| BUCKETS | non-reserved | non-reserved | non-reserved |
| BY | non-reserved | non-reserved | reserved |
| CACHE | non-reserved | non-reserved | non-reserved |
| CASCADE | non-reserved | non-reserved | reserved |
| CASE | reserved | non-reserved | reserved |
| CAST | reserved | non-reserved | reserved |
| CHANGE | non-reserved | non-reserved | non-reserved |
| CHECK | reserved | non-reserved | reserved |
| CLEAR | non-reserved | non-reserved | non-reserved |
| CLUSTER | non-reserved | non-reserved | non-reserved |
| CLUSTERED | non-reserved | non-reserved | non-reserved |
| CODEGEN | non-reserved | non-reserved | non-reserved |
| COLLATE | reserved | non-reserved | reserved |
| COLLECTION | non-reserved | non-reserved | non-reserved |
| COLUMN | reserved | non-reserved | reserved |
| COLUMNS | non-reserved | non-reserved | non-reserved |
| COMMENT | non-reserved | non-reserved | non-reserved |
| COMMIT | non-reserved | non-reserved | reserved |
| COMPACT | non-reserved | non-reserved | non-reserved |
| COMPACTIONS | non-reserved | non-reserved | non-reserved |
| COMPUTE | non-reserved | non-reserved | non-reserved |
| CONCATENATE | non-reserved | non-reserved | non-reserved |
| CONSTRAINT | reserved | non-reserved | reserved |
| COST | non-reserved | non-reserved | non-reserved |
| CREATE | reserved | non-reserved | reserved |
| CROSS | reserved | strict-non-reserved | reserved |
| CUBE | non-reserved | non-reserved | reserved |
| CURRENT | non-reserved | non-reserved | reserved |
| CURRENT_DATE | reserved | non-reserved | reserved |
| CURRENT_TIME | reserved | non-reserved | reserved |
| CURRENT_TIMESTAMP | reserved | non-reserved | reserved |
| CURRENT_USER | reserved | non-reserved | reserved |
| DATA | non-reserved | non-reserved | non-reserved |
| DATABASE | non-reserved | non-reserved | non-reserved |
| DATABASES | non-reserved | non-reserved | non-reserved |
| DAY | reserved | non-reserved | reserved |
| DAYS | non-reserved | non-reserved | non-reserved |
| DBPROPERTIES | non-reserved | non-reserved | non-reserved |
| DEFINED | non-reserved | non-reserved | non-reserved |
| DELETE | non-reserved | non-reserved | reserved |
| DELIMITED | non-reserved | non-reserved | non-reserved |
| DESC | non-reserved | non-reserved | non-reserved |
| DESCRIBE | non-reserved | non-reserved | reserved |
| DFS | non-reserved | non-reserved | non-reserved |
| DIRECTORIES | non-reserved | non-reserved | non-reserved |
| DIRECTORY | non-reserved | non-reserved | non-reserved |
| DISTINCT | reserved | non-reserved | reserved |
| DISTRIBUTE | non-reserved | non-reserved | non-reserved |
| DIV | non-reserved | non-reserved | non-reserved |
| DROP | non-reserved | non-reserved | reserved |
| ELSE | reserved | non-reserved | reserved |
| END | reserved | non-reserved | reserved |
| ESCAPED | non-reserved | non-reserved | non-reserved |
| EXCEPT | reserved | strict-non-reserved | reserved |
| EXCHANGE | non-reserved | non-reserved | non-reserved |
| EXISTS | non-reserved | non-reserved | reserved |
| EXPLAIN | non-reserved | non-reserved | non-reserved |
| EXPORT | non-reserved | non-reserved | non-reserved |
| EXTENDED | non-reserved | non-reserved | non-reserved |
| EXTERNAL | non-reserved | non-reserved | reserved |
| EXTRACT | non-reserved | non-reserved | reserved |
| FALSE | reserved | non-reserved | reserved |
| FETCH | reserved | non-reserved | reserved |
| FIELDS | non-reserved | non-reserved | non-reserved |
| FILEFORMAT | non-reserved | non-reserved | non-reserved |
| FIRST | non-reserved | non-reserved | non-reserved |
| FOLLOWING | non-reserved | non-reserved | non-reserved |
| FOR | reserved | non-reserved | reserved |
| FOREIGN | reserved | non-reserved | reserved |
| FORMAT | non-reserved | non-reserved | non-reserved |
| FORMATTED | non-reserved | non-reserved | non-reserved |
| FROM | reserved | non-reserved | reserved |
| FULL | reserved | strict-non-reserved | reserved |
| FUNCTION | non-reserved | non-reserved | reserved |
| FUNCTIONS | non-reserved | non-reserved | non-reserved |
| GLOBAL | non-reserved | non-reserved | reserved |
| GRANT | reserved | non-reserved | reserved |
| GROUP | reserved | non-reserved | reserved |
| GROUPING | non-reserved | non-reserved | reserved |
| HAVING | reserved | non-reserved | reserved |
| HOUR | reserved | non-reserved | reserved |
| HOURS | non-reserved | non-reserved | non-reserved |
| IF | non-reserved | non-reserved | reserved |
| IGNORE | non-reserved | non-reserved | non-reserved |
| IMPORT | non-reserved | non-reserved | non-reserved |
| IN | reserved | non-reserved | reserved |
| INDEX | non-reserved | non-reserved | non-reserved |
| INDEXES | non-reserved | non-reserved | non-reserved |
| INNER | reserved | strict-non-reserved | reserved |
| INPATH | non-reserved | non-reserved | non-reserved |
| INPUTFORMAT | non-reserved | non-reserved | non-reserved |
| INSERT | non-reserved | non-reserved | reserved |
| INTERSECT | reserved | strict-non-reserved | reserved |
| INTERVAL | non-reserved | non-reserved | reserved |
| INTO | reserved | non-reserved | reserved |
| IS | reserved | non-reserved | reserved |
| ITEMS | non-reserved | non-reserved | non-reserved |
| JOIN | reserved | strict-non-reserved | reserved |
| KEYS | non-reserved | non-reserved | non-reserved |
| LAST | non-reserved | non-reserved | non-reserved |
| LATERAL | non-reserved | non-reserved | reserved |
| LAZY | non-reserved | non-reserved | non-reserved |
| LEADING | reserved | non-reserved | reserved |
| LEFT | reserved | strict-non-reserved | reserved |
| LIKE | non-reserved | non-reserved | reserved |
| LIMIT | non-reserved | non-reserved | non-reserved |
| LINES | non-reserved | non-reserved | non-reserved |
| LIST | non-reserved | non-reserved | non-reserved |
| LOAD | non-reserved | non-reserved | non-reserved |
| LOCAL | non-reserved | non-reserved | reserved |
| LOCATION | non-reserved | non-reserved | non-reserved |
| LOCK | non-reserved | non-reserved | non-reserved |
| LOCKS | non-reserved | non-reserved | non-reserved |
| LOGICAL | non-reserved | non-reserved | non-reserved |
| MACRO | non-reserved | non-reserved | non-reserved |
| MAP | non-reserved | non-reserved | non-reserved |
| MICROSECOND | non-reserved | non-reserved | non-reserved |
| MICROSECONDS | non-reserved | non-reserved | non-reserved |
| MILLISECOND | non-reserved | non-reserved | non-reserved |
| MILLISECONDS | non-reserved | non-reserved | non-reserved |
| MINUS | reserved | strict-non-reserved | non-reserved |
| MINUTE | reserved | non-reserved | reserved |
| MINUTES | non-reserved | non-reserved | non-reserved |
| MONTH | reserved | non-reserved | reserved |
| MONTHS | non-reserved | non-reserved | non-reserved |
| MSCK | non-reserved | non-reserved | non-reserved |
| NATURAL | reserved | strict-non-reserved | reserved |
| NO | non-reserved | non-reserved | reserved |
| NOT | reserved | non-reserved | reserved |
| NULL | reserved | non-reserved | reserved |
| NULLS | non-reserved | non-reserved | non-reserved |
| OF | non-reserved | non-reserved | reserved |
| ON | reserved | strict-non-reserved | reserved |
| ONLY | reserved | non-reserved | reserved |
| OPTION | non-reserved | non-reserved | non-reserved |
| OPTIONS | non-reserved | non-reserved | non-reserved |
| OR | reserved | non-reserved | reserved |
| ORDER | reserved | non-reserved | reserved |
| OUT | non-reserved | non-reserved | reserved |
| OUTER | reserved | non-reserved | reserved |
| OUTPUTFORMAT | non-reserved | non-reserved | non-reserved |
| OVER | non-reserved | non-reserved | non-reserved |
| OVERLAPS | reserved | non-reserved | reserved |
| OVERWRITE | non-reserved | non-reserved | non-reserved |
| PARTITION | non-reserved | non-reserved | reserved |
| PARTITIONED | non-reserved | non-reserved | non-reserved |
| PARTITIONS | non-reserved | non-reserved | non-reserved |
| PERCENT | non-reserved | non-reserved | non-reserved |
| PIVOT | non-reserved | non-reserved | non-reserved |
| POSITION | non-reserved | non-reserved | reserved |
| PRECEDING | non-reserved | non-reserved | non-reserved |
| PRIMARY | reserved | non-reserved | reserved |
| PRINCIPALS | non-reserved | non-reserved | non-reserved |
| PURGE | non-reserved | non-reserved | non-reserved |
| QUERY | non-reserved | non-reserved | non-reserved |
| RANGE | non-reserved | non-reserved | reserved |
| RECORDREADER | non-reserved | non-reserved | non-reserved |
| RECORDWRITER | non-reserved | non-reserved | non-reserved |
| RECOVER | non-reserved | non-reserved | non-reserved |
| REDUCE | non-reserved | non-reserved | non-reserved |
| REFERENCES | reserved | non-reserved | reserved |
| REFRESH | non-reserved | non-reserved | non-reserved |
| RENAME | non-reserved | non-reserved | non-reserved |
| REPAIR | non-reserved | non-reserved | non-reserved |
| REPLACE | non-reserved | non-reserved | non-reserved |
| RESET | non-reserved | non-reserved | non-reserved |
| RESTRICT | non-reserved | non-reserved | non-reserved |
| REVOKE | non-reserved | non-reserved | reserved |
| RIGHT | reserved | strict-non-reserved | reserved |
| RLIKE | non-reserved | non-reserved | non-reserved |
| ROLE | non-reserved | non-reserved | non-reserved |
| ROLES | non-reserved | non-reserved | non-reserved |
| ROLLBACK | non-reserved | non-reserved | reserved |
| ROLLUP | non-reserved | non-reserved | reserved |
| ROW | non-reserved | non-reserved | reserved |
| ROWS | non-reserved | non-reserved | reserved |
| SCHEMA | non-reserved | non-reserved | non-reserved |
| SECOND | reserved | non-reserved | reserved |
| SECONDS | non-reserved | non-reserved | non-reserved |
| SELECT | reserved | non-reserved | reserved |
| SEMI | reserved | strict-non-reserved | non-reserved |
| SEPARATED | non-reserved | non-reserved | non-reserved |
| SERDE | non-reserved | non-reserved | non-reserved |
| SERDEPROPERTIES | non-reserved | non-reserved | non-reserved |
| SESSION_USER | reserved | non-reserved | reserved |
| SET | non-reserved | non-reserved | reserved |
| SETS | non-reserved | non-reserved | non-reserved |
| SHOW | non-reserved | non-reserved | non-reserved |
| SKEWED | non-reserved | non-reserved | non-reserved |
| SOME | reserved | non-reserved | reserved |
| SORT | non-reserved | non-reserved | non-reserved |
| SORTED | non-reserved | non-reserved | non-reserved |
| START | non-reserved | non-reserved | reserved |
| STATISTICS | non-reserved | non-reserved | non-reserved |
| STORED | non-reserved | non-reserved | non-reserved |
| STRATIFY | non-reserved | non-reserved | non-reserved |
| STRUCT | non-reserved | non-reserved | non-reserved |
| TABLE | reserved | non-reserved | reserved |
| TABLES | non-reserved | non-reserved | non-reserved |
| TABLESAMPLE | non-reserved | non-reserved | reserved |
| TBLPROPERTIES | non-reserved | non-reserved | non-reserved |
| TEMPORARY | non-reserved | non-reserved | non-reserved |
| TERMINATED | non-reserved | non-reserved | non-reserved |
| THEN | reserved | non-reserved | reserved |
| TO | reserved | non-reserved | reserved |
| TOUCH | non-reserved | non-reserved | non-reserved |
| TRAILING | reserved | non-reserved | reserved |
| TRANSACTION | non-reserved | non-reserved | non-reserved |
| TRANSACTIONS | non-reserved | non-reserved | non-reserved |
| TRANSFORM | non-reserved | non-reserved | non-reserved |
| TRUE | non-reserved | non-reserved | reserved |
| TRUNCATE | non-reserved | non-reserved | reserved |
| UNARCHIVE | non-reserved | non-reserved | non-reserved |
| UNBOUNDED | non-reserved | non-reserved | non-reserved |
| UNCACHE | non-reserved | non-reserved | non-reserved |
| UNION | reserved | strict-non-reserved | reserved |
| UNIQUE | reserved | non-reserved | reserved |
| UNLOCK | non-reserved | non-reserved | non-reserved |
| UNSET | non-reserved | non-reserved | non-reserved |
| USE | non-reserved | non-reserved | non-reserved |
| USER | reserved | non-reserved | reserved |
| USING | reserved | strict-non-reserved | reserved |
| VALUES | non-reserved | non-reserved | reserved |
| VIEW | non-reserved | non-reserved | non-reserved |
| WEEK | non-reserved | non-reserved | non-reserved |
| WEEKS | non-reserved | non-reserved | non-reserved |
| WHEN | reserved | non-reserved | reserved |
| WHERE | reserved | non-reserved | reserved |
| WINDOW | non-reserved | non-reserved | reserved |
| WITH | reserved | non-reserved | reserved |
| YEAR | reserved | non-reserved | reserved |
| YEARS | non-reserved | non-reserved | non-reserved |