risingwave_frontend/handler/
drop_mv.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::StreamJobStatus;
17use risingwave_pb::meta::cancel_creating_jobs_request::{CreatingJobIds, PbJobs};
18use risingwave_sqlparser::ast::ObjectName;
19
20use super::RwPgResponse;
21use crate::binder::Binder;
22use crate::catalog::CatalogError;
23use crate::catalog::root_catalog::SchemaPath;
24use crate::catalog::table_catalog::TableType;
25use crate::error::Result;
26use crate::handler::HandlerArgs;
27
28pub async fn handle_drop_mv(
29    handler_args: HandlerArgs,
30    table_name: ObjectName,
31    if_exists: bool,
32    cascade: bool,
33) -> Result<RwPgResponse> {
34    let session = handler_args.session;
35    let db_name = &session.database();
36    let (schema_name, table_name) = Binder::resolve_schema_qualified_name(db_name, table_name)?;
37    let search_path = session.config().search_path();
38    let user_name = &session.user_name();
39
40    let schema_path = SchemaPath::new(schema_name.as_deref(), &search_path, user_name);
41
42    let (table_id, status) = {
43        let reader = session.env().catalog_reader().read_guard();
44        let (table, schema_name) =
45            match reader.get_any_table_by_name(&session.database(), schema_path, &table_name) {
46                Ok((t, s)) => (t, s),
47                Err(e) => {
48                    return if if_exists {
49                        Ok(RwPgResponse::builder(StatementType::DROP_MATERIALIZED_VIEW)
50                            .notice(format!(
51                                "materialized view \"{}\" does not exist, skipping",
52                                table_name
53                            ))
54                            .into())
55                    } else {
56                        match e {
57                            CatalogError::NotFound("table", name) => {
58                                Err(CatalogError::NotFound("materialized view", name).into())
59                            }
60                            _ => Err(e.into()),
61                        }
62                    };
63                }
64            };
65
66        session.check_privilege_for_drop_alter(schema_name, &**table)?;
67
68        match table.table_type() {
69            TableType::MaterializedView => {}
70            _ => return Err(table.bad_drop_error()),
71        }
72
73        (table.id(), table.stream_job_status)
74    };
75
76    match status {
77        StreamJobStatus::Created => {
78            let catalog_writer = session.catalog_writer()?;
79            catalog_writer
80                .drop_materialized_view(table_id, cascade)
81                .await?;
82        }
83        StreamJobStatus::Creating => {
84            let canceled_jobs = session
85                .env()
86                .meta_client()
87                .cancel_creating_jobs(PbJobs::Ids(CreatingJobIds {
88                    job_ids: vec![table_id.table_id],
89                }))
90                .await?;
91            tracing::info!(?canceled_jobs, "cancelled creating jobs");
92        }
93    }
94
95    Ok(PgResponse::empty_result(
96        StatementType::DROP_MATERIALIZED_VIEW,
97    ))
98}
99
100#[cfg(test)]
101mod tests {
102    use risingwave_common::catalog::{DEFAULT_DATABASE_NAME, DEFAULT_SCHEMA_NAME};
103
104    use crate::catalog::root_catalog::SchemaPath;
105    use crate::test_utils::LocalFrontend;
106
107    #[tokio::test]
108    async fn test_drop_mv_handler() {
109        let sql_create_table = "create table t (v1 smallint);";
110        let sql_create_mv = "create materialized view mv as select v1 from t;";
111        let sql_drop_mv = "drop materialized view mv;";
112        let frontend = LocalFrontend::new(Default::default()).await;
113        frontend.run_sql(sql_create_table).await.unwrap();
114        frontend.run_sql(sql_create_mv).await.unwrap();
115        frontend.run_sql(sql_drop_mv).await.unwrap();
116
117        let session = frontend.session_ref();
118        let catalog_reader = session.env().catalog_reader().read_guard();
119        let schema_path = SchemaPath::Name(DEFAULT_SCHEMA_NAME);
120
121        let table =
122            catalog_reader.get_created_table_by_name(DEFAULT_DATABASE_NAME, schema_path, "mv");
123        assert!(table.is_err());
124    }
125}
risingwave_frontend/handler/drop_mv.rs

risingwave_frontend/handler/
drop_mv.rs
