common_meta/ddl/create_logical_tables/
check.rs

1// Copyright 2023 Greptime Team
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 snafu::ensure;
16
17use crate::ddl::create_logical_tables::CreateLogicalTablesProcedure;
18use crate::error::{CreateLogicalTablesInvalidArgumentsSnafu, Result, TableAlreadyExistsSnafu};
19use crate::key::table_name::TableNameKey;
20
21impl CreateLogicalTablesProcedure {
22    pub(crate) fn check_input_tasks(&self) -> Result<()> {
23        self.check_schema()?;
24
25        Ok(())
26    }
27
28    pub async fn check_tables_already_exist(&mut self) -> Result<()> {
29        let table_name_keys = self
30            .data
31            .all_create_table_exprs()
32            .iter()
33            .map(|expr| TableNameKey::new(&expr.catalog_name, &expr.schema_name, &expr.table_name))
34            .collect::<Vec<_>>();
35        let table_ids_already_exists = self
36            .context
37            .table_metadata_manager
38            .table_name_manager()
39            .batch_get(table_name_keys)
40            .await?
41            .iter()
42            .map(|x| x.map(|x| x.table_id()))
43            .collect::<Vec<_>>();
44
45        self.data.table_ids_already_exists = table_ids_already_exists;
46
47        // Validates the tasks
48        let tasks = &mut self.data.tasks;
49        for (task, table_id) in tasks.iter().zip(self.data.table_ids_already_exists.iter()) {
50            if table_id.is_some() {
51                // If a table already exists, we just ignore it.
52                ensure!(
53                    task.create_table.create_if_not_exists,
54                    TableAlreadyExistsSnafu {
55                        table_name: task.create_table.table_name.to_string(),
56                    }
57                );
58                continue;
59            }
60        }
61
62        Ok(())
63    }
64
65    // Checks if the schemas of the tasks are the same
66    fn check_schema(&self) -> Result<()> {
67        let is_same_schema = self.data.tasks.windows(2).all(|pair| {
68            pair[0].create_table.catalog_name == pair[1].create_table.catalog_name
69                && pair[0].create_table.schema_name == pair[1].create_table.schema_name
70        });
71
72        ensure!(
73            is_same_schema,
74            CreateLogicalTablesInvalidArgumentsSnafu {
75                err_msg: "Schemas of the tasks are not the same"
76            }
77        );
78
79        Ok(())
80    }
81}
common_meta/ddl/create_logical_tables/check.rs

common_meta/ddl/create_logical_tables/
check.rs
