risingwave_frontend/handler/
drop_connection.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_sqlparser::ast::ObjectName;
17
18use super::RwPgResponse;
19use crate::binder::Binder;
20use crate::catalog::root_catalog::SchemaPath;
21use crate::error::Result;
22use crate::handler::HandlerArgs;
23
24pub async fn handle_drop_connection(
25    handler_args: HandlerArgs,
26    connection_name: ObjectName,
27    if_exists: bool,
28) -> Result<RwPgResponse> {
29    let session = handler_args.session;
30    let db_name = &session.database();
31    let (schema_name, connection_name) =
32        Binder::resolve_schema_qualified_name(db_name, connection_name)?;
33    let search_path = session.config().search_path();
34    let user_name = &session.user_name();
35
36    let schema_path = SchemaPath::new(schema_name.as_deref(), &search_path, user_name);
37
38    let connection_id = {
39        let reader = session.env().catalog_reader().read_guard();
40        let (connection, schema_name) =
41            match reader.get_connection_by_name(db_name, schema_path, connection_name.as_str()) {
42                Ok((c, s)) => (c, s),
43                Err(e) => {
44                    return if if_exists {
45                        Ok(RwPgResponse::builder(StatementType::DROP_CONNECTION)
46                            .notice(format!(
47                                "connection \"{}\" does not exist, skipping",
48                                connection_name
49                            ))
50                            .into())
51                    } else {
52                        Err(e.into())
53                    };
54                }
55            };
56        session.check_privilege_for_drop_alter(schema_name, &**connection)?;
57
58        connection.id
59    };
60
61    let catalog_writer = session.catalog_writer()?;
62    catalog_writer.drop_connection(connection_id).await?;
63
64    Ok(PgResponse::empty_result(StatementType::DROP_CONNECTION))
65}
risingwave_frontend/handler/drop_connection.rs

risingwave_frontend/handler/
drop_connection.rs
