Snowflake: Add DROP EXTERNAL VOLUME

src/ast/mod.rs

@@ -8774,6 +8774,8 @@ pub enum ObjectType {
     User,
     /// A stream.
     Stream,
+    /// A Snowflake external volume.
+    ExternalVolume,
     /// A warehouse.
     Warehouse,
 }
@@ -8794,6 +8796,7 @@ impl fmt::Display for ObjectType {
             ObjectType::Type => "TYPE",
             ObjectType::User => "USER",
             ObjectType::Stream => "STREAM",
+            ObjectType::ExternalVolume => "EXTERNAL VOLUME",
             ObjectType::Warehouse => "WAREHOUSE",
         })
     }

src/parser/mod.rs

@@ -8103,6 +8103,8 @@ impl<'a> Parser<'a> {
             ObjectType::User
         } else if self.parse_keyword(Keyword::STREAM) {
             ObjectType::Stream
+        } else if self.parse_keywords(&[Keyword::EXTERNAL, Keyword::VOLUME]) {
+            ObjectType::ExternalVolume
         } else if self.parse_keyword(Keyword::WAREHOUSE) {
             ObjectType::Warehouse
         } else if self.parse_keyword(Keyword::FUNCTION) {
@@ -8132,7 +8134,7 @@ impl<'a> Parser<'a> {
             };
         } else {
             return self.expected_ref(
-                "COLLATION, CONNECTOR, DATABASE, EXTENSION, FUNCTION, INDEX, OPERATOR, POLICY, PROCEDURE, ROLE, SCHEMA, SECRET, SEQUENCE, STAGE, TABLE, TRIGGER, TYPE, VIEW, MATERIALIZED VIEW, USER or WAREHOUSE after DROP",
+                "COLLATION, CONNECTOR, DATABASE, EXTENSION, EXTERNAL VOLUME, FUNCTION, INDEX, OPERATOR, POLICY, PROCEDURE, ROLE, SCHEMA, SECRET, SEQUENCE, STAGE, TABLE, TRIGGER, TYPE, VIEW, MATERIALIZED VIEW, USER or WAREHOUSE after DROP",
                 self.peek_token_ref(),
             );
         };

tests/sqlparser_snowflake.rs

@@ -5042,3 +5042,40 @@ fn test_stage_name_delimiters() {
         ParserError::ParserError("Expected: stage name identifier, found: .".to_string()),
     );
 }
+
+#[test]
+fn test_drop_external_volume() {
+    match snowflake().verified_stmt("DROP EXTERNAL VOLUME my_vol") {
+        Statement::Drop {
+            object_type,
+            if_exists,
+            names,
+            ..
+        } => {
+            assert_eq!(ObjectType::ExternalVolume, object_type);
+            assert!(!if_exists);
+            assert_eq!("my_vol", names[0].to_string());
+        }
+        _ => unreachable!(),
+    }
+    let err = snowflake()
+        .parse_sql_statements("DROP EXTERNAL my_vol")
+        .unwrap_err()
+        .to_string();
+    assert!(err.contains("EXTERNAL VOLUME"), "{err}");
+}
+
+#[test]
+fn test_drop_external_volume_if_exists() {
+    match snowflake().verified_stmt("DROP EXTERNAL VOLUME IF EXISTS my_vol") {
+        Statement::Drop {
+            object_type,
+            if_exists,
+            ..
+        } => {
+            assert_eq!(ObjectType::ExternalVolume, object_type);
+            assert!(if_exists);
+        }
+        _ => unreachable!(),
+    }
+}