1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167

// 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::write_comma_separated_list;
use crate::ast::write_dot_separated_list;
use crate::ast::CreateOption;
use crate::ast::Identifier;
use crate::ast::Query;
use crate::ast::ShowLimit;

#[derive(Debug, Clone, PartialEq, Drive, DriveMut)]
pub struct CreateViewStmt {
    pub create_option: CreateOption,
    pub catalog: Option<Identifier>,
    pub database: Option<Identifier>,
    pub view: Identifier,
    pub columns: Vec<Identifier>,
    pub query: Box<Query>,
}

impl Display for CreateViewStmt {
    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, "VIEW ")?;
        if let CreateOption::CreateIfNotExists = self.create_option {
            write!(f, "IF NOT EXISTS ")?;
        }
        write_dot_separated_list(
            f,
            self.catalog
                .iter()
                .chain(&self.database)
                .chain(Some(&self.view)),
        )?;
        if !self.columns.is_empty() {
            write!(f, " (")?;
            write_comma_separated_list(f, &self.columns)?;
            write!(f, ")")?;
        }
        write!(f, " AS {}", self.query)
    }
}

#[derive(Debug, Clone, PartialEq, Drive, DriveMut)]
pub struct AlterViewStmt {
    pub catalog: Option<Identifier>,
    pub database: Option<Identifier>,
    pub view: Identifier,
    pub columns: Vec<Identifier>,
    pub query: Box<Query>,
}

impl Display for AlterViewStmt {
    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
        write!(f, "ALTER VIEW ")?;
        write_dot_separated_list(
            f,
            self.catalog
                .iter()
                .chain(&self.database)
                .chain(Some(&self.view)),
        )?;
        if !self.columns.is_empty() {
            write!(f, " (")?;
            write_comma_separated_list(f, &self.columns)?;
            write!(f, ")")?;
        }
        write!(f, " AS {}", self.query)
    }
}

#[derive(Debug, Clone, PartialEq, Eq, Drive, DriveMut)]
pub struct DropViewStmt {
    pub if_exists: bool,
    pub catalog: Option<Identifier>,
    pub database: Option<Identifier>,
    pub view: Identifier,
}

impl Display for DropViewStmt {
    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
        write!(f, "DROP VIEW ")?;
        if self.if_exists {
            write!(f, "IF EXISTS ")?;
        }
        write_dot_separated_list(
            f,
            self.catalog
                .iter()
                .chain(&self.database)
                .chain(Some(&self.view)),
        )
    }
}

#[derive(Debug, Clone, PartialEq, Drive, DriveMut)]
pub struct ShowViewsStmt {
    pub catalog: Option<Identifier>,
    pub database: Option<Identifier>,
    pub full: bool,
    pub limit: Option<ShowLimit>,
    pub with_history: bool,
}

impl Display for ShowViewsStmt {
    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
        write!(f, "SHOW")?;
        if self.full {
            write!(f, " FULL")?;
        }
        write!(f, " VIEWS")?;
        if self.with_history {
            write!(f, " HISTORY")?;
        }
        if let Some(database) = &self.database {
            write!(f, " FROM ")?;
            if let Some(catalog) = &self.catalog {
                write!(f, "{catalog}.",)?;
            }
            write!(f, "{database}")?;
        }
        if let Some(limit) = &self.limit {
            write!(f, " {limit}")?;
        }

        Ok(())
    }
}

#[derive(Debug, Clone, PartialEq, Eq, Drive, DriveMut)]
pub struct DescribeViewStmt {
    pub catalog: Option<Identifier>,
    pub database: Option<Identifier>,
    pub view: Identifier,
}

impl Display for DescribeViewStmt {
    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
        write!(f, "DESCRIBE VIEW ")?;
        write_dot_separated_list(
            f,
            self.catalog
                .iter()
                .chain(self.database.iter().chain(Some(&self.view))),
        )
    }
}