danking opened a new issue, #1145:
URL: https://github.com/apache/iceberg-rust/issues/1145
### Apache Iceberg Rust version
0.4.0 (latest version)
### Describe the bug
I'm using a (relatively new) Iceberg Rest catalog. I expected the following
to simply return an empty vector but instead I received an error.
```
Error: Unexpected => Can't scan table without snapshots
```
Indeed this table appears to have no snapshots yet. Is this expected
behavior or should Iceberg Rust return an empty scan?
```rust
let catalog = RestCatalog::new(
RestCatalogConfig::builder()
.uri("http://localhost:4279/iceberg".to_owned())
.warehouse("file://".to_string())
.props(
[("token".to_owned(), secret.to_owned())]
.into_iter()
.collect(),
)
.build(),
);
let namespace = NamespaceIdent::from_strs(["clay-husky-438588", "xx"])?;
let resp = catalog.create_namespace(&namespace, HashMap::new()).await;
let table_ident = TableIdent::new(namespace.clone(), "table".to_owned());
catalog
.create_table(
&namespace,
TableCreation::builder()
.name("table".to_owned())
.schema(Schema::builder().build()?)
.build(),
)
.await?
let table = catalog.load_table(&table_ident).await?;
let stream = table
.scan()
.build()?
.to_arrow()
.await?;
let _data: Vec<_> = stream.try_collect().await?;
```
FWIW, PyIceberg returns an empty scan using the same catalog:
```python
catalog.create_namespace_if_not_exists(('clay-husky-438588', 'xx'))
table = catalog.create_table(
"clay-husky-438588.table02", schema=pa.schema([('x', pa.int64())])
)
table.scan().to_pandas()
```
Error:
```
Error: Unexpected => Can't scan table without snapshots
Backtrace:
0: std::backtrace_rs::backtrace::libunwind::trace
at
/rustc/a0d98ff0e5b6e1f2c63fd26f68484792621b235c/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
1: std::backtrace_rs::backtrace::trace_unsynchronized
at
/rustc/a0d98ff0e5b6e1f2c63fd26f68484792621b235c/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: std::backtrace::Backtrace::create
at
/rustc/a0d98ff0e5b6e1f2c63fd26f68484792621b235c/library/std/src/backtrace.rs:331:13
3: iceberg::error::Error::new
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/iceberg-0.4.0/src/error.rs:206:24
4: iceberg::scan::TableScanBuilder::build::{{closure}}
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/iceberg-0.4.0/src/scan.rs:208:21
5: core::option::Option<T>::ok_or_else
at
/Users/danielking/.rustup/toolchains/nightly-2024-11-01-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/option.rs:1276:25
6: iceberg::scan::TableScanBuilder::build
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/iceberg-0.4.0/src/scan.rs:203:21
7: iceberg::main::{{closure}}
at ./examples/src/bin/iceberg.rs:53:18
8: <core::pin::Pin<P> as core::future::future::Future>::poll
at
/Users/danielking/.rustup/toolchains/nightly-2024-11-01-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/future/future.rs:123:9
9: tokio::runtime::park::CachedParkThread::block_on::{{closure}}
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.44.0/src/runtime/park.rs:284:60
10: tokio::task::coop::with_budget
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.44.0/src/task/coop/mod.rs:167:5
11: tokio::task::coop::budget
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.44.0/src/task/coop/mod.rs:133:5
12: tokio::runtime::park::CachedParkThread::block_on
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.44.0/src/runtime/park.rs:284:31
13: tokio::runtime::context::blocking::BlockingRegionGuard::block_on
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.44.0/src/runtime/context/blocking.rs:66:9
14:
tokio::runtime::scheduler::multi_thread::MultiThread::block_on::{{closure}}
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.44.0/src/runtime/scheduler/multi_thread/mod.rs:87:13
15: tokio::runtime::context::runtime::enter_runtime
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.44.0/src/runtime/context/runtime.rs:65:16
16: tokio::runtime::scheduler::multi_thread::MultiThread::block_on
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.44.0/src/runtime/scheduler/multi_thread/mod.rs:86:9
17: tokio::runtime::runtime::Runtime::block_on_inner
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.44.0/src/runtime/runtime.rs:370:45
18: tokio::runtime::runtime::Runtime::block_on
at
/Users/danielking/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.44.0/src/runtime/runtime.rs:340:13
19: iceberg::main
at ./examples/src/bin/iceberg.rs:62:5
20: core::ops::function::FnOnce::call_once
at
/Users/danielking/.rustup/toolchains/nightly-2024-11-01-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ops/function.rs:250:5
21: std::sys::backtrace::__rust_begin_short_backtrace
at
/Users/danielking/.rustup/toolchains/nightly-2024-11-01-aarch64-apple-darwin/lib/rustlib/src/rust/library/std/src/sys/backtrace.rs:154:18
22: std::rt::lang_start::{{closure}}
at
/Users/danielking/.rustup/toolchains/nightly-2024-11-01-aarch64-apple-darwin/lib/rustlib/src/rust/library/std/src/rt.rs:195:18
23: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for
&F>::call_once
at
/rustc/a0d98ff0e5b6e1f2c63fd26f68484792621b235c/library/core/src/ops/function.rs:284:13
24: std::panicking::try::do_call
at
/rustc/a0d98ff0e5b6e1f2c63fd26f68484792621b235c/library/std/src/panicking.rs:557:40
25: std::panicking::try
at
/rustc/a0d98ff0e5b6e1f2c63fd26f68484792621b235c/library/std/src/panicking.rs:520:19
26: std::panic::catch_unwind
at
/rustc/a0d98ff0e5b6e1f2c63fd26f68484792621b235c/library/std/src/panic.rs:358:14
27: std::rt::lang_start_internal::{{closure}}
at
/rustc/a0d98ff0e5b6e1f2c63fd26f68484792621b235c/library/std/src/rt.rs:174:48
28: std::panicking::try::do_call
at
/rustc/a0d98ff0e5b6e1f2c63fd26f68484792621b235c/library/std/src/panicking.rs:557:40
29: std::panicking::try
at
/rustc/a0d98ff0e5b6e1f2c63fd26f68484792621b235c/library/std/src/panicking.rs:520:19
30: std::panic::catch_unwind
at
/rustc/a0d98ff0e5b6e1f2c63fd26f68484792621b235c/library/std/src/panic.rs:358:14
31: std::rt::lang_start_internal
at
/rustc/a0d98ff0e5b6e1f2c63fd26f68484792621b235c/library/std/src/rt.rs:174:20
32: std::rt::lang_start
at
/Users/danielking/.rustup/toolchains/nightly-2024-11-01-aarch64-apple-darwin/lib/rustlib/src/rust/library/std/src/rt.rs:194:17
33: _main
```
### To Reproduce
See above
### Expected behavior
I expected an empty result.
### Willingness to contribute
I would be willing to contribute a fix for this bug with guidance from the
Iceberg community
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