Icesource commented on a change in pull request #12247:
URL: https://github.com/apache/shardingsphere/pull/12247#discussion_r703632921
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File path:
shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/antlr4/imports/sqlserver/DDLStatement.g4
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@@ -39,6 +39,10 @@ createProcedure
: CREATE (OR ALTER)? (PROC | PROCEDURE) procedureName procParameters
createProcClause
;
+createView
+ : CREATE (OR ALTER)? VIEW viewName createViewClause
+ ;
+
Review comment:
@jingshanglu The grammar definition here is a bit confusing. ```CREATE
(OR ALTER)?``` is defined in CREATE syntax. It corresponds to such a sentence
“CREATE OR ALTER VIEW ...”. This is a new T-SQL language statement announced in
SQL Server 2016 SP1. And it can be applied on the following object:
procedures,functions,triggers and views.
https://docs.microsoft.com/en-us/archive/blogs/sqlserverstorageengine/create-or-alter-another-great-language-enhancement-in-sql-server-2016-sp1.
Create View Definition:
https://docs.microsoft.com/en-us/sql/t-sql/statements/create-view-transact-sql?view=sql-server-ver15
Alter View Definition:
https://docs.microsoft.com/en-us/sql/t-sql/statements/alter-view-transact-sql?view=sql-server-ver15
Although their grammar is almost the same, should I think it(```CREATE OR
ALTER```) should be parsed into a SQLServerCreateViewStatement ?
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