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| data | ||
| results | ||
| results | ||
| venv |
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| # 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. | ||
|
|
||
| rich |
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| Original file line number | Diff line number | Diff line change |
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| // 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. | ||
|
|
||
| //! Shows an example of a custom session context that unions the input plan with itself. | ||
| //! To run this example, use `cargo run --example cli-session-context` from within the `datafusion-cli` directory. | ||
| use std::sync::Arc; | ||
|
|
||
| use datafusion::{ | ||
| dataframe::DataFrame, | ||
| error::DataFusionError, | ||
| execution::{context::SessionState, TaskContext}, | ||
| logical_expr::{LogicalPlan, LogicalPlanBuilder}, | ||
| prelude::SessionContext, | ||
| }; | ||
| use datafusion_cli::{ | ||
| cli_context::CliSessionContext, exec::exec_from_repl, print_options::PrintOptions, | ||
| }; | ||
| use object_store::ObjectStore; | ||
|
|
||
| /// This is a toy example of a custom session context that unions the input plan with itself. | ||
| struct MyUnionerContext { | ||
| ctx: SessionContext, | ||
| } | ||
|
|
||
| impl Default for MyUnionerContext { | ||
| fn default() -> Self { | ||
| Self { | ||
| ctx: SessionContext::new(), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| #[async_trait::async_trait] | ||
| impl CliSessionContext for MyUnionerContext { | ||
| fn task_ctx(&self) -> Arc<TaskContext> { | ||
| self.ctx.task_ctx() | ||
| } | ||
|
|
||
| fn session_state(&self) -> SessionState { | ||
| self.ctx.state() | ||
| } | ||
|
|
||
| fn register_object_store( | ||
| &self, | ||
| url: &url::Url, | ||
| object_store: Arc<dyn ObjectStore>, | ||
| ) -> Option<Arc<dyn ObjectStore + 'static>> { | ||
| self.ctx.register_object_store(url, object_store) | ||
| } | ||
|
|
||
| fn register_table_options_extension_from_scheme(&self, _scheme: &str) { | ||
| unimplemented!() | ||
| } | ||
|
|
||
| async fn execute_logical_plan( | ||
| &self, | ||
| plan: LogicalPlan, | ||
| ) -> Result<DataFrame, DataFusionError> { | ||
| let new_plan = LogicalPlanBuilder::from(plan.clone()) | ||
| .union(plan.clone())? | ||
| .build()?; | ||
|
|
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| self.ctx.execute_logical_plan(new_plan).await | ||
| } | ||
| } | ||
|
|
||
| #[tokio::main] | ||
| /// Runs the example. | ||
| pub async fn main() { | ||
| let mut my_ctx = MyUnionerContext::default(); | ||
|
|
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| let mut print_options = PrintOptions { | ||
| format: datafusion_cli::print_format::PrintFormat::Automatic, | ||
| quiet: false, | ||
| maxrows: datafusion_cli::print_options::MaxRows::Unlimited, | ||
| color: true, | ||
| }; | ||
|
|
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| exec_from_repl(&mut my_ctx, &mut print_options) | ||
| .await | ||
| .unwrap(); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| // 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 std::sync::Arc; | ||
|
|
||
| use datafusion::{ | ||
| dataframe::DataFrame, | ||
| error::DataFusionError, | ||
| execution::{context::SessionState, TaskContext}, | ||
| logical_expr::LogicalPlan, | ||
| prelude::SessionContext, | ||
| }; | ||
| use object_store::ObjectStore; | ||
|
|
||
| use crate::object_storage::{AwsOptions, GcpOptions}; | ||
|
|
||
| #[async_trait::async_trait] | ||
| /// The CLI session context trait provides a way to have a session context that can be used with datafusion's CLI code. | ||
| pub trait CliSessionContext { | ||
| /// Get an atomic reference counted task context. | ||
| fn task_ctx(&self) -> Arc<TaskContext>; | ||
|
|
||
| /// Get the session state. | ||
| fn session_state(&self) -> SessionState; | ||
|
|
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| /// Register an object store with the session context. | ||
| fn register_object_store( | ||
| &self, | ||
| url: &url::Url, | ||
| object_store: Arc<dyn ObjectStore>, | ||
| ) -> Option<Arc<dyn ObjectStore + 'static>>; | ||
|
|
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| /// Register table options extension from scheme. | ||
| fn register_table_options_extension_from_scheme(&self, scheme: &str); | ||
|
|
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| /// Execute a logical plan and return a DataFrame. | ||
| async fn execute_logical_plan( | ||
| &self, | ||
| plan: LogicalPlan, | ||
| ) -> Result<DataFrame, DataFusionError>; | ||
| } | ||
|
|
||
| #[async_trait::async_trait] | ||
| impl CliSessionContext for SessionContext { | ||
| fn task_ctx(&self) -> Arc<TaskContext> { | ||
| self.task_ctx() | ||
| } | ||
|
|
||
| fn session_state(&self) -> SessionState { | ||
| self.state() | ||
| } | ||
|
|
||
| fn register_object_store( | ||
| &self, | ||
| url: &url::Url, | ||
| object_store: Arc<dyn ObjectStore>, | ||
| ) -> Option<Arc<dyn ObjectStore + 'static>> { | ||
| self.register_object_store(url, object_store) | ||
| } | ||
|
|
||
| fn register_table_options_extension_from_scheme(&self, scheme: &str) { | ||
| match scheme { | ||
| // For Amazon S3 or Alibaba Cloud OSS | ||
| "s3" | "oss" | "cos" => { | ||
| // Register AWS specific table options in the session context: | ||
| self.register_table_options_extension(AwsOptions::default()) | ||
| } | ||
| // For Google Cloud Storage | ||
| "gs" | "gcs" => { | ||
| // Register GCP specific table options in the session context: | ||
| self.register_table_options_extension(GcpOptions::default()) | ||
| } | ||
| // For unsupported schemes, do nothing: | ||
| _ => {} | ||
| } | ||
| } | ||
|
|
||
| async fn execute_logical_plan( | ||
| &self, | ||
| plan: LogicalPlan, | ||
| ) -> Result<DataFrame, DataFusionError> { | ||
| self.execute_logical_plan(plan).await | ||
| } | ||
| } |
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