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[SPARK-14398][SQL] Audit non-reserved keyword list in ANTLR4 parser
## What changes were proposed in this pull request? I have compared non-reserved list in Antlr3 and Antlr4 one by one as well as all the existing keywords defined in Antlr4, added the missing keywords to the non-reserved keywords list. If we need to support more syntax, we can add more keywords by then. Any recommendation for the above is welcome. ## How was this patch tested? I manually checked the keywords one by one. Please let me know if there is a better way to test. Another thought: I suggest to put all the keywords definition and non-reserved list in order, that will be much easier to check in the future. Author: bomeng <bmeng@us.ibm.com> Closes #12191 from bomeng/SPARK-14398.
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