risingwave_frontend/handler/
drop_source.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::catalog::ICEBERG_SOURCE_PREFIX;
17use risingwave_sqlparser::ast::ObjectName;
18
19use super::RwPgResponse;
20use super::util::execute_with_long_running_notification;
21use crate::binder::Binder;
22use crate::catalog::root_catalog::SchemaPath;
23use crate::error::Result;
24use crate::handler::HandlerArgs;
25
26pub async fn handle_drop_source(
27    handler_args: HandlerArgs,
28    name: ObjectName,
29    if_exists: bool,
30    cascade: bool,
31) -> Result<RwPgResponse> {
32    let session = handler_args.session;
33    let db_name = &session.database();
34    let (schema_name, source_name) = Binder::resolve_schema_qualified_name(db_name, &name)?;
35    let search_path = session.config().search_path();
36    let user_name = &session.user_name();
37
38    // Check if temporary source exists, if yes, drop it.
39    if let Some(_source) = session.get_temporary_source(&source_name) {
40        session.drop_temporary_source(&source_name);
41        return Ok(PgResponse::empty_result(StatementType::DROP_SOURCE));
42    }
43
44    let schema_path = SchemaPath::new(schema_name.as_deref(), &search_path, user_name);
45
46    let (source, schema_name) = {
47        let catalog_reader = session.env().catalog_reader().read_guard();
48
49        if let Ok((table, _)) =
50            catalog_reader.get_created_table_by_name(db_name, schema_path, &source_name)
51        {
52            return Err(table.bad_drop_error());
53        }
54
55        match catalog_reader.get_source_by_name(db_name, schema_path, &source_name) {
56            Ok((s, schema)) => (s.clone(), schema),
57            Err(e) => {
58                return if if_exists {
59                    Ok(RwPgResponse::builder(StatementType::DROP_SOURCE)
60                        .notice(format!(
61                            "source \"{}\" does not exist, skipping",
62                            source_name
63                        ))
64                        .into())
65                } else {
66                    Err(e.into())
67                };
68            }
69        }
70    };
71
72    if source_name.starts_with(ICEBERG_SOURCE_PREFIX) {
73        return Err(crate::error::ErrorCode::NotSupported(
74            "Dropping Iceberg sources is not supported".to_owned(),
75            "Please use DROP TABLE command.".to_owned(),
76        )
77        .into());
78    }
79
80    session.check_privilege_for_drop_alter(schema_name, &*source)?;
81
82    let catalog_writer = session.catalog_writer()?;
83    execute_with_long_running_notification(
84        catalog_writer.drop_source(source.id, cascade),
85        &session,
86        "DROP SOURCE",
87    )
88    .await?;
89
90    Ok(PgResponse::empty_result(StatementType::DROP_SOURCE))
91}
risingwave_frontend/handler/drop_source.rs

risingwave_frontend/handler/
drop_source.rs
