databend-common-ast 0.2.5

// Copyright 2021 Datafuse Labs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::fmt::Display;
use std::fmt::Formatter;

use derive_visitor::Drive;
use derive_visitor::DriveMut;

use crate::ast::CreateOption;
use crate::ast::Identifier;
use crate::ast::quote::QuotedString;

#[derive(Debug, Clone, PartialEq, Drive, DriveMut)]
pub struct CreateSequenceStmt {
    pub create_option: CreateOption,
    pub sequence: Identifier,
    pub start: Option<u64>,
    pub increment: Option<u64>,
    pub comment: Option<String>,
}

impl Display for CreateSequenceStmt {
    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
        write!(f, "CREATE ")?;
        if let CreateOption::CreateOrReplace = self.create_option {
            write!(f, "OR REPLACE ")?;
        }
        write!(f, "SEQUENCE ")?;
        if let CreateOption::CreateIfNotExists = self.create_option {
            write!(f, "IF NOT EXISTS ")?;
        }
        write!(f, "{}", self.sequence)?;

        if let Some(s) = &self.start {
            write!(f, " START = {}", s)?;
        }

        if let Some(i) = &self.increment {
            write!(f, " INCREMENT = {}", i)?;
        }
        if let Some(comment) = &self.comment {
            write!(f, " COMMENT = {}", QuotedString(comment, '\''))?;
        }
        Ok(())
    }
}

#[derive(Debug, Clone, PartialEq, Drive, DriveMut)]
pub struct DropSequenceStmt {
    pub if_exists: bool,
    pub sequence: Identifier,
}

impl Display for DropSequenceStmt {
    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
        write!(f, "DROP SEQUENCE ")?;
        if self.if_exists {
            write!(f, "IF EXISTS ")?;
        }
        write!(f, "{}", self.sequence)?;
        Ok(())
    }
}