risingwave_frontend/handler/
create_database.rs

1// Copyright 2025 RisingWave 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 pgwire::pg_response::{PgResponse, StatementType};
16use risingwave_common::util::worker_util::DEFAULT_RESOURCE_GROUP;
17use risingwave_sqlparser::ast::{ObjectName, SetVariableValue};
18
19use super::RwPgResponse;
20use crate::binder::Binder;
21use crate::catalog::CatalogError;
22use crate::error::ErrorCode::PermissionDenied;
23use crate::error::Result;
24use crate::handler::HandlerArgs;
25use crate::handler::alter_resource_group::resolve_resource_group;
26
27pub async fn handle_create_database(
28    handler_args: HandlerArgs,
29    database_name: ObjectName,
30    if_not_exist: bool,
31    owner: Option<ObjectName>,
32    resource_group: Option<SetVariableValue>,
33) -> Result<RwPgResponse> {
34    let session = handler_args.session;
35    let database_name = Binder::resolve_database_name(database_name)?;
36
37    {
38        let user_reader = session.env().user_info_reader();
39        let reader = user_reader.read_guard();
40        if let Some(info) = reader.get_user_by_name(&session.user_name()) {
41            if !info.can_create_db && !info.is_super {
42                return Err(PermissionDenied("Do not have the privilege".to_owned()).into());
43            }
44        } else {
45            return Err(PermissionDenied("Session user is invalid".to_owned()).into());
46        }
47    }
48
49    {
50        let catalog_reader = session.env().catalog_reader();
51        let reader = catalog_reader.read_guard();
52        if reader.get_database_by_name(&database_name).is_ok() {
53            // If `if_not_exist` is true, not return error.
54            return if if_not_exist {
55                Ok(PgResponse::builder(StatementType::CREATE_DATABASE)
56                    .notice(format!("database \"{}\" exists, skipping", database_name))
57                    .into())
58            } else {
59                Err(CatalogError::Duplicated("database", database_name, false).into())
60            };
61        }
62    }
63
64    let database_owner = if let Some(owner) = owner {
65        let owner = Binder::resolve_user_name(owner)?;
66        session
67            .env()
68            .user_info_reader()
69            .read_guard()
70            .get_user_by_name(&owner)
71            .map(|u| u.id)
72            .ok_or_else(|| CatalogError::NotFound("user", owner.clone()))?
73    } else {
74        session.user_id()
75    };
76
77    let resource_group = resource_group.map(resolve_resource_group).transpose()?;
78
79    let resource_group = resource_group.as_deref().unwrap_or(DEFAULT_RESOURCE_GROUP);
80
81    let catalog_writer = session.catalog_writer()?;
82    catalog_writer
83        .create_database(&database_name, database_owner, resource_group)
84        .await?;
85
86    Ok(PgResponse::empty_result(StatementType::CREATE_DATABASE))
87}
88
89#[cfg(test)]
90mod tests {
91    use crate::test_utils::LocalFrontend;
92
93    #[tokio::test]
94    async fn test_create_database() {
95        let frontend = LocalFrontend::new(Default::default()).await;
96        let session = frontend.session_ref();
97        let catalog_reader = session.env().catalog_reader();
98
99        frontend.run_sql("CREATE DATABASE database").await.unwrap();
100        {
101            let reader = catalog_reader.read_guard();
102            assert!(reader.get_database_by_name("database").is_ok());
103        }
104
105        frontend.run_sql("CREATE USER user WITH NOSUPERUSER NOCREATEDB PASSWORD 'md5827ccb0eea8a706c4c34a16891f84e7b'").await.unwrap();
106        let user_id = {
107            let user_reader = session.env().user_info_reader();
108            user_reader
109                .read_guard()
110                .get_user_by_name("user")
111                .unwrap()
112                .id
113        };
114        let res = frontend
115            .run_user_sql(
116                "CREATE DATABASE database2",
117                "dev".to_owned(),
118                "user".to_owned(),
119                user_id,
120            )
121            .await;
122        assert!(res.is_err());
123
124        frontend.run_sql("CREATE USER user2 WITH NOSUPERUSER CREATEDB PASSWORD 'md5827ccb0eea8a706c4c34a16891f84e7b'").await.unwrap();
125        let user_id = {
126            let user_reader = session.env().user_info_reader();
127            user_reader
128                .read_guard()
129                .get_user_by_name("user2")
130                .unwrap()
131                .id
132        };
133        frontend
134            .run_user_sql(
135                "CREATE DATABASE database2",
136                "dev".to_owned(),
137                "user2".to_owned(),
138                user_id,
139            )
140            .await
141            .unwrap();
142        {
143            let reader = catalog_reader.read_guard();
144            assert!(reader.get_database_by_name("database2").is_ok());
145        }
146    }
147}
risingwave_frontend/handler/create_database.rs

risingwave_frontend/handler/
create_database.rs
