risingwave_frontend/catalog/system_catalog/pg_catalog/
pg_tables.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 risingwave_common::types::Fields;
16use risingwave_frontend_macro::system_catalog;
17
18/// The view `pg_tables` provides access to useful information about each table in the database.
19/// Ref: [`https://www.postgresql.org/docs/current/view-pg-tables.html`]
20#[system_catalog(
21    view,
22    "pg_catalog.pg_tables",
23    "SELECT s.name AS schemaname,
24            t.tablename,
25            pg_catalog.pg_get_userbyid(t.owner) AS tableowner,
26            NULL AS tablespace
27    FROM
28        (SELECT name AS tablename,
29                schema_id,
30                owner
31                FROM rw_catalog.rw_tables
32            UNION
33            SELECT name AS tablename,
34                schema_id,
35                owner
36                FROM rw_catalog.rw_system_tables) AS t
37        JOIN rw_catalog.rw_schemas s ON t.schema_id = s.id
38        AND s.name <> 'rw_catalog'"
39)]
40#[derive(Fields)]
41struct PgTable {
42    schemaname: String,
43    tablename: String,
44    tableowner: String,
45    // Since we don't have any concept of tablespace, we will set this to null.
46    tablespace: String,
47}