risingwave_frontend/expr/function_impl/
pg_get_indexdef.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 std::fmt::Write;
16
17use risingwave_expr::{ExprError, Result, capture_context, function};
18use thiserror_ext::AsReport;
19
20use super::context::{CATALOG_READER, DB_NAME};
21use crate::catalog::CatalogReader;
22
23#[function("pg_get_indexdef(int4) -> varchar")]
24fn pg_get_indexdef(oid: i32, writer: &mut impl Write) -> Result<()> {
25    pg_get_indexdef_impl_captured(oid, 0, writer)
26}
27
28#[function("pg_get_indexdef(int4, int4, boolean) -> varchar")]
29fn pg_get_indexdef_col(
30    oid: i32,
31    column_no: i32,
32    _pretty_bool: bool,
33    writer: &mut impl Write,
34) -> Result<()> {
35    pg_get_indexdef_impl_captured(oid, column_no, writer)
36}
37
38#[capture_context(CATALOG_READER, DB_NAME)]
39fn pg_get_indexdef_impl(
40    catalog: &CatalogReader,
41    db_name: &str,
42    oid: i32,
43    column_no: i32,
44    writer: &mut impl Write,
45) -> Result<()> {
46    let ans = if column_no == 0 {
47        catalog
48            .read_guard()
49            .get_index_by_id(db_name, oid as u32)
50            .map_err(|e| ExprError::InvalidParam {
51                name: "oid",
52                reason: e.to_report_string().into(),
53            })?
54            .index_table
55            .create_sql()
56    } else {
57        catalog
58            .read_guard()
59            .get_index_by_id(db_name, oid as u32)
60            .map_err(|e| ExprError::InvalidParam {
61                name: "oid",
62                reason: e.to_report_string().into(),
63            })?
64            .get_column_def(column_no as usize - 1)
65            .unwrap_or_default()
66    };
67    write!(writer, "{}", ans).unwrap();
68    Ok(())
69}
risingwave_frontend/expr/function_impl/pg_get_indexdef.rs

risingwave_frontend/expr/function_impl/
pg_get_indexdef.rs
