lovasoa commented on code in PR #1500:
URL:
https://github.com/apache/datafusion-sqlparser-rs/pull/1500#discussion_r1832990576
##########
src/ast/mod.rs:
##########
@@ -808,6 +808,21 @@ pub enum Expr {
},
/// Scalar function call e.g. `LEFT(foo, 5)`
Function(Function),
+ /// CompositeFunction (function chain)
+ ///
+ /// Syntax:
+ ///
+ /// `<arbitrary-expr>.<arbitrary-expr>.<arbitrary-expr>...`
+ ///
+ /// > `arbitrary-expr` can be any expression including a function call.
+ ///
+ /// Example:
+ ///
+ /// ```sql
+ /// SELECT (SELECT ',' + name FROM sys.objects FOR XML PATH(''),
TYPE).value('.','NVARCHAR(MAX)')
+ /// SELECT CONVERT(XML,'<Book>abc</Book>').value('.','NVARCHAR(MAX)')
+ /// ```
+ CompositeFunction(CompositeFunction),
Review Comment:
Maybe we can find a better name ? Something like `MethodCall { expr, method
}` instead of `CompositeFunction { left, right }`
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