databend_common_ast/ast/statements/
system_action.rs

1// Copyright 2021 Datafuse Labs
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15use std::fmt::Display;
16use std::fmt::Formatter;
17
18use derive_visitor::Drive;
19use derive_visitor::DriveMut;
20
21#[derive(Debug, Clone, PartialEq, Drive, DriveMut)]
22pub struct SystemStmt {
23    pub action: SystemAction,
24}
25
26impl Display for SystemStmt {
27    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
28        write!(f, "SYSTEM {}", self.action)
29    }
30}
31
32#[derive(Debug, Clone, PartialEq, Eq, Drive, DriveMut)]
33pub enum SystemAction {
34    Backtrace(bool),
35}
36
37impl Display for SystemAction {
38    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
39        match self {
40            SystemAction::Backtrace(switch) => match switch {
41                true => write!(f, "ENABLE EXCEPTION_BACKTRACE"),
42                false => write!(f, "DISABLE EXCEPTION_BACKTRACE"),
43            },
44        }
45    }
46}
databend_common_ast/ast/statements/system_action.rs

databend_common_ast/ast/statements/
system_action.rs
