` to work without SessionContext
alamb commented on code in PR #7441:
URL: https://github.com/apache/arrow-datafusion/pull/7441#discussion_r1308755281
##########
datafusion/core/tests/dataframe/describe.rs:
##########
@@ -0,0 +1,96 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+use datafusion::{
+ assert_batches_eq,
+ prelude::{ParquetReadOptions, SessionContext},
+};
+use datafusion_common::{test_util::parquet_test_data, Result};
+
+#[tokio::test]
+async fn describe() -> Result<()> {
Review Comment:
I just moved these tests into their own module to make it easier to find. Note that `Dataframe::describe` and the `DESCRIBE` sql command are different 😱
##########
datafusion/core/tests/sql/describe.rs:
##########
@@ -0,0 +1,72 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+use datafusion::assert_batches_eq;
+use datafusion::prelude::*;
+use datafusion_common::test_util::parquet_test_data;
+
+#[tokio::test]
+async fn describe_plan() {
+ let ctx = parquet_context().await;
+
+ let query = "describe alltypes_tiny_pages";
+ let results = ctx.sql(query).await.unwrap().collect().await.unwrap();
+
+ let expected = vec![
+ "+-----------------+-----------------------------+-------------+",
+ "| column_name | data_type | is_nullable |",
+ "+-----------------+-----------------------------+-------------+",
+ "| id | Int32 | YES |",
+ "| bool_col | Boolean | YES |",
+ "| tinyint_col | Int8 | YES |",
+ "| smallint_col | Int16 | YES |",
+ "| int_col | Int32 | YES |",
+ "| bigint_col | Int64 | YES |",
+ "| float_col | Float32 | YES |",
+ "| double_col | Float64 | YES |",
+ "| date_string_col | Utf8 | YES |",
+ "| string_col | Utf8 | YES |",
+ "| timestamp_col | Timestamp(Nanosecond, None) | YES |",
+ "| year | Int32 | YES |",
+ "| month | Int32 | YES |",
+ "+-----------------+-----------------------------+-------------+",
+ ];
+
+ assert_batches_eq!(expected, &results);
+
+ // also ensure we plan Describe via SessionState
Review Comment:
Without the code in this PR, this test fails like this:
```
---- sql::describe::describe_plan stdout ----
thread 'sql::describe::describe_plan' panicked at 'called `Result::unwrap()` on an `Err` value: Internal("Unsupported logical plan: DescribeTable must be root of the plan")', datafusion/core/tests/sql/describe.rs:55:38
stack backtrace:
0: rust_begin_unwind
at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/panicking.rs:593:5
1: core::panicking::panic_fmt
at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/core/src/panicking.rs:67:14
2: core::result::unwrap_failed
at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/core/src/result.rs:1651:5
3: core::result::Result<T,E>::unwrap
at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/core/src/result.rs:1076:23
4: core_integration::sql::describe::describe_plan::{{closure}}
at ./tests/sql/describe.rs:55:19
5: <core::pin::Pin<P> as core::future::future::Future>::poll
at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/core/src/future/future.rs:125:9
6: <core::pin::Pin<P> as core::future::future::Future>::poll
at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/core/src/future/future.rs:125:9
7: tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::{{closure}}::{{closure}}
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:665:57
8: tokio::runtime::coop::with_budget
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/coop.rs:107:5
9: tokio::runtime::coop::budget
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/coop.rs:73:5
10: tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}::{{closure}}
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:665:25
11: tokio::runtime::scheduler::current_thread::Context::enter
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:410:19
12: tokio::runtime::scheduler::current_thread::CoreGuard::block_on::{{closure}}
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:664:36
13: tokio::runtime::scheduler::current_thread::CoreGuard::enter::{{closure}}
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:743:68
14: tokio::runtime::context::scoped::Scoped<T>::set
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/context/scoped.rs:40:9
15: tokio::runtime::context::set_scheduler::{{closure}}
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/context.rs:176:26
16: std::thread::local::LocalKey<T>::try_with
at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/thread/local.rs:270:16
17: std::thread::local::LocalKey<T>::with
at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/std/src/thread/local.rs:246:9
18: tokio::runtime::context::set_scheduler
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/context.rs:176:9
19: tokio::runtime::scheduler::current_thread::CoreGuard::enter
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:743:27
20: tokio::runtime::scheduler::current_thread::CoreGuard::block_on
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:652:19
21: tokio::runtime::scheduler::current_thread::CurrentThread::block_on::{{closure}}
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:175:28
22: tokio::runtime::context::runtime::enter_runtime
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/context/runtime.rs:65:16
23: tokio::runtime::scheduler::current_thread::CurrentThread::block_on
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/scheduler/current_thread/mod.rs:167:9
24: tokio::runtime::runtime::Runtime::block_on
at /Users/alamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tokio-1.32.0/src/runtime/runtime.rs:347:47
25: core_integration::sql::describe::describe_plan
at ./tests/sql/describe.rs:57:5
26: core_integration::sql::describe::describe_plan::{{closure}}
at ./tests/sql/describe.rs:24:27
27: core::ops::function::FnOnce::call_once
at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/core/src/ops/function.rs:250:5
28: core::ops::function::FnOnce::call_once
at /rustc/5680fa18feaa87f3ff04063800aec256c3d4b4be/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
```
##########
datafusion/core/tests/dataframe/describe.rs:
##########
@@ -0,0 +1,96 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+use datafusion::{
+ assert_batches_eq,
+ prelude::{ParquetReadOptions, SessionContext},
+};
+use datafusion_common::{test_util::parquet_test_data, Result};
+
+#[tokio::test]
+async fn describe() -> Result<()> {
Review Comment:
I just moved these tests into their own module to make it easier to find. Note that `Dataframe::describe` and the `DESCRIBE` sql command are different 😱
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