feat: support parsing the RENAME TABLE statements in the parser (#780)

* feat: add parsing `alter rename table` syntax to the parser

* chore: fix clippy

* chore: add test for parser

* fix: add test for parsing RENAME keyword

* chore: remove unused code

* fix: parse table name object

Co-authored-by: Yingwen <realevenyag@gmail.com>

* chore: fmt code

Co-authored-by: Yingwen <realevenyag@gmail.com>

src/sql/src/parsers/alter_parser.rs

@@ -51,9 +51,20 @@ impl<'a> ParserContext<'a> {
                     parser.peek_token()
                 )));
             }
+        } else if parser.parse_keyword(Keyword::RENAME) {
+            let new_table_name_obj = parser.parse_object_name()?;
+            let new_table_name = match &new_table_name_obj.0[..] {
+                [table] => table.value.clone(),
+                _ => {
+                    return Err(ParserError::ParserError(format!(
+                        "expect table name, actual: {new_table_name_obj}"
+                    )))
+                }
+            };
+            AlterTableOperation::RenameTable { new_table_name }
         } else {
             return Err(ParserError::ParserError(format!(
-                "expect keyword ADD or DROP after ALTER TABLE, found {}",
+                "expect keyword ADD or DROP or RENAME after ALTER TABLE, found {}",
                 parser.peek_token()
             )));
         };
@@ -130,4 +141,35 @@ mod tests {
             _ => unreachable!(),
         }
     }
+
+    #[test]
+    fn test_parse_alter_rename_table() {
+        let sql = "ALTER TABLE test_table table_t";
+        let result = ParserContext::create_with_dialect(sql, &GenericDialect {}).unwrap_err();
+        assert!(result
+            .to_string()
+            .contains("expect keyword ADD or DROP or RENAME after ALTER TABLE"));
+
+        let sql = "ALTER TABLE test_table RENAME table_t";
+        let mut result = ParserContext::create_with_dialect(sql, &GenericDialect {}).unwrap();
+        assert_eq!(1, result.len());
+
+        let statement = result.remove(0);
+        assert_matches!(statement, Statement::Alter { .. });
+        match statement {
+            Statement::Alter(alter_table) => {
+                assert_eq!("test_table", alter_table.table_name().0[0].value);
+
+                let alter_operation = alter_table.alter_operation();
+                assert_matches!(alter_operation, AlterTableOperation::RenameTable { .. });
+                match alter_operation {
+                    AlterTableOperation::RenameTable { new_table_name } => {
+                        assert_eq!("table_t", new_table_name);
+                    }
+                    _ => unreachable!(),
+                }
+            }
+            _ => unreachable!(),
+        }
+    }
 }

src/sql/src/statements/alter.rs

@@ -49,6 +49,8 @@ pub enum AlterTableOperation {
     AddColumn { column_def: ColumnDef },
     /// `DROP COLUMN <name>`
     DropColumn { name: Ident },
+    /// `RENAME <new_table_name>`
+    RenameTable { new_table_name: String },
 }
 
 /// Convert `AlterTable` statement to `AlterExpr` for gRPC
@@ -78,6 +80,13 @@ impl TryFrom<AlterTable> for AlterExpr {
                     drop_columns: vec![DropColumn { name: name.value }],
                 })
             }
+            AlterTableOperation::RenameTable { .. } => {
+                // TODO update proto to support alter table name
+                return UnsupportedAlterTableStatementSnafu {
+                    msg: "rename table not supported yet",
+                }
+                .fail();
+            }
         };
         let expr = AlterExpr {
             catalog_name,