risingwave_ctl/cmd_impl/hummock/
list_kv.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 core::ops::Bound::Unbounded;
16
17use risingwave_common::catalog::TableId;
18use risingwave_common::util::epoch::is_max_epoch;
19use risingwave_hummock_sdk::HummockReadEpoch;
20use risingwave_storage::StateStore;
21use risingwave_storage::hummock::CachePolicy;
22use risingwave_storage::store::{
23    NewReadSnapshotOptions, PrefetchOptions, ReadOptions, StateStoreIter, StateStoreRead,
24};
25
26use crate::CtlContext;
27use crate::common::HummockServiceOpts;
28
29pub async fn list_kv(
30    context: &CtlContext,
31    epoch: u64,
32    table_id: u32,
33    data_dir: Option<String>,
34    use_new_object_prefix_strategy: bool,
35) -> anyhow::Result<()> {
36    let hummock = context
37        .hummock_store(HummockServiceOpts::from_env(
38            data_dir,
39            use_new_object_prefix_strategy,
40        )?)
41        .await?;
42    if is_max_epoch(epoch) {
43        tracing::info!("using MAX EPOCH as epoch");
44    }
45    let range = (Unbounded, Unbounded);
46    let read_snapshot = hummock
47        .new_read_snapshot(
48            HummockReadEpoch::Committed(epoch),
49            NewReadSnapshotOptions {
50                table_id: TableId { table_id },
51            },
52        )
53        .await?;
54    let mut scan_result = read_snapshot
55        .iter(
56            range,
57            ReadOptions {
58                table_id: TableId { table_id },
59                prefetch_options: PrefetchOptions::prefetch_for_large_range_scan(),
60                cache_policy: CachePolicy::NotFill,
61                ..Default::default()
62            },
63        )
64        .await?;
65    while let Some(item) = scan_result.try_next().await? {
66        let (k, v) = item;
67        let print_string = format!("[t{}]", k.user_key.table_id.table_id());
68        println!("{} {:?} => {:?}", print_string, k, v)
69    }
70    Ok(())
71}
risingwave_ctl/cmd_impl/hummock/list_kv.rs

risingwave_ctl/cmd_impl/hummock/
list_kv.rs
