Add support of parsing struct field's options in BigQuery (#1890)

Co-authored-by: Ifeanyi Ubah <ify1992@yahoo.com>

Author: git-hulk

src/ast/mod.rs

@@ -428,14 +428,22 @@ impl fmt::Display for Interval {
 pub struct StructField {
     pub field_name: Option<Ident>,
     pub field_type: DataType,
+    /// Struct field options.
+    /// See [BigQuery](https://cloud.google.com/bigquery/docs/reference/standard-sql/data-definition-language#column_name_and_column_schema)
+    pub options: Option<Vec<SqlOption>>,
 }
 
 impl fmt::Display for StructField {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         if let Some(name) = &self.field_name {
-            write!(f, "{name} {}", self.field_type)
+            write!(f, "{name} {}", self.field_type)?;
         } else {
-            write!(f, "{}", self.field_type)
+            write!(f, "{}", self.field_type)?;
+        }
+        if let Some(options) = &self.options {
+            write!(f, " OPTIONS({})", display_separated(options, ", "))
+        } else {
+            Ok(())
         }
     }
 }

src/parser/mod.rs

@@ -3076,6 +3076,7 @@ impl<'a> Parser<'a> {
             Ok(StructField {
                 field_name: Some(field_name),
                 field_type,
+                options: None,
             })
         });
         self.expect_token(&Token::RParen)?;
@@ -3109,10 +3110,12 @@ impl<'a> Parser<'a> {
 
         let (field_type, trailing_bracket) = self.parse_data_type_helper()?;
 
+        let options = self.maybe_parse_options(Keyword::OPTIONS)?;
         Ok((
             StructField {
                 field_name,
                 field_type,
+                options,
             },
             trailing_bracket,
         ))