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https://issues.apache.org/jira/browse/SPARK-26905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17133215#comment-17133215
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Takeshi Yamamuro commented on SPARK-26905:
------------------------------------------
Ah, I got noticed that they are already reserved in the ANSI mode (the document
says so, too:
[https://github.com/apache/spark/blob/master/docs/sql-ref-ansi-compliance.md]);
{code:java}
scala> sql("SET spark.sql.ansi.enabled=false")
scala> sql("create table t1 (anti int)")
res10: org.apache.spark.sql.DataFrame = []
scala> sql("create table t2 (semi int)")
res11: org.apache.spark.sql.DataFrame = []
scala> sql("create table t3 (minus int)")
res12: org.apache.spark.sql.DataFrame = []
scala> sql("SET spark.sql.ansi.enabled=true")
scala> sql("create table t4 (anti int)")
org.apache.spark.sql.catalyst.parser.ParseException:
no viable alternative at input 'anti'(line 1, pos 17)
== SQL ==
create table t4 (anti int)
-----------------^^^
scala> sql("create table t5 (semi int)")
org.apache.spark.sql.catalyst.parser.ParseException:
no viable alternative at input 'semi'(line 1, pos 17)
== SQL ==
create table t5 (semi int)
-----------------^^^
scala> sql("create table t6 (minus int)")
org.apache.spark.sql.catalyst.parser.ParseException:
no viable alternative at input 'minus'(line 1, pos 17)
== SQL ==
create table t6 (minus int)
-----------------^^^
{code}
Actually, the Spark reserved keywords in the ANSI mode are computed by
`spark-keywords-list.txt – spark-ansiNonReserved.txt – "strict non-reserved
keywords"`. Yay, I think we already follow the standard SQL2016, haha
> Revisit reserved/non-reserved keywords based on the ANSI SQL standard
> ---------------------------------------------------------------------
>
> Key: SPARK-26905
> URL: https://issues.apache.org/jira/browse/SPARK-26905
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Xiao Li
> Priority: Major
> Attachments: spark-ansiNonReserved.txt, spark-keywords-list.txt,
> spark-nonReserved.txt, spark-strictNonReserved.txt,
> sql2016-02-nonreserved.txt, sql2016-02-reserved.txt,
> sql2016-09-nonreserved.txt, sql2016-09-reserved.txt,
> sql2016-14-nonreserved.txt, sql2016-14-reserved.txt
>
>
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