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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/07/25 13:03:09 UTC
[GitHub] [arrow-ballista] avantgardnerio commented on a diff in pull request #93: Add FlightSQL support
avantgardnerio commented on code in PR #93:
URL: https://github.com/apache/arrow-ballista/pull/93#discussion_r928858994
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ballista/rust/scheduler/src/flight_sql.rs:
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@@ -0,0 +1,402 @@
+use std::collections::HashMap;
+use std::sync::{Arc, Mutex};
+use std::time::Duration;
+use arrow_flight::{FlightData, FlightDescriptor, FlightEndpoint, FlightInfo, Location, Ticket};
+use arrow_flight::flight_descriptor::DescriptorType;
+use arrow_flight::flight_service_server::FlightService;
+use arrow_flight::sql::{ActionClosePreparedStatementRequest, ActionCreatePreparedStatementRequest, ActionCreatePreparedStatementResult, CommandGetCatalogs, CommandGetCrossReference, CommandGetDbSchemas, CommandGetExportedKeys, CommandGetImportedKeys, CommandGetPrimaryKeys, CommandGetSqlInfo, CommandGetTables, CommandGetTableTypes, CommandPreparedStatementQuery, CommandPreparedStatementUpdate, CommandStatementQuery, CommandStatementUpdate, SqlInfo, TicketStatementQuery};
+use arrow_flight::sql::server::FlightSqlService;
+use log::{debug, error};
+use tonic::{Response, Status, Streaming};
+
+use crate::scheduler_server::SchedulerServer;
+use datafusion_proto::protobuf::LogicalPlanNode;
+use ballista_core::{
+ serde::protobuf::{PhysicalPlanNode},
+};
+use ballista_core::config::BallistaConfig;
+use arrow_flight::SchemaAsIpc;
+use datafusion::arrow;
+use datafusion::arrow::datatypes::Schema;
+use datafusion::arrow::ipc::writer::{IpcDataGenerator, IpcWriteOptions};
+use datafusion::logical_expr::LogicalPlan;
+use tokio::time::sleep;
+use uuid::{Uuid};
+use crate::scheduler_server::event::QueryStageSchedulerEvent;
+use ballista_core::serde::protobuf::job_status;
+use ballista_core::serde::protobuf::JobStatus;
+use ballista_core::serde::protobuf;
+use prost::Message;
+
+#[derive(Clone)]
+pub struct FlightSqlServiceImpl {
+ server: SchedulerServer<LogicalPlanNode, PhysicalPlanNode>,
+ statements: Arc<Mutex<HashMap<Uuid, LogicalPlan>>>,
+}
+
+impl FlightSqlServiceImpl {
+ pub fn new(server: SchedulerServer<LogicalPlanNode, PhysicalPlanNode>) -> Self {
+ Self { server, statements: Arc::new(Mutex::new(HashMap::new())) }
+ }
+}
+
+#[tonic::async_trait]
+impl FlightSqlService for FlightSqlServiceImpl {
+ type FlightService = FlightSqlServiceImpl;
+ // get_flight_info
+ async fn get_flight_info_statement(
+ &self,
+ query: CommandStatementQuery,
+ request: FlightDescriptor,
+ ) -> Result<Response<FlightInfo>, Status> {
+ debug!("Got query:\n{}", query.query);
+
+ // Run query
+ let config_builder = BallistaConfig::builder();
+ let config = config_builder.build()
+ .map_err(|e| Status::internal(format!("Error building config: {}", e)))?;
+ let ctx = self.server
+ .state
+ .session_manager
+ .create_session(&config)
+ .await
+ .map_err(|e| {
+ Status::internal(format!(
+ "Failed to create SessionContext: {:?}",
+ e
+ ))
+ })?;
+ let plan = ctx
+ .sql(&query.query.as_str())
+ .await
+ .and_then(|df| df.to_logical_plan())
+ .map_err(|e| Status::internal(format!("Error building plan: {}", e)))?;
+
+ // enqueue job
+ let job_id = self.server.state.task_manager.generate_job_id();
+
+ self.server.state
+ .task_manager
+ .queue_job(&job_id)
+ .await
+ .map_err(|e| {
+ let msg = format!("Failed to queue job {}: {:?}", job_id, e);
+ error!("{}", msg);
+
+ Status::internal(msg)
+ })?;
+
+ let query_stage_event_sender =
+ self.server.query_stage_event_loop.get_sender().map_err(|e| {
+ Status::internal(format!(
+ "Could not get query stage event sender due to: {}",
+ e
+ ))
+ })?;
+
+ query_stage_event_sender
+ .post_event(QueryStageSchedulerEvent::JobQueued {
+ job_id: job_id.clone(),
+ session_id: ctx.session_id().clone(),
+ session_ctx: ctx,
+ plan: Box::new(plan.clone()),
+ })
+ .await
+ .map_err(|e| {
+ let msg =
+ format!("Failed to send JobQueued event for {}: {:?}", job_id, e);
+ error!("{}", msg);
+ Status::internal(msg)
+ })?;
+
+ // let handle = Uuid::new_v4();
+ // let mut statements = self.statements.try_lock()
+ // .map_err(|e| Status::internal(format!("Error locking statements: {}", e)))?;
+ // statements.insert(handle, plan.clone());
+
+ // poll for job completion
+ let mut num_rows = 0;
+ let mut num_bytes = 0;
+ let fieps = loop {
+ sleep(Duration::from_millis(100)).await;
+ let status = self.server.state.task_manager.get_job_status(&job_id).await
+ .map_err(|e| {
+ let msg = format!("Error getting status for job {}: {:?}", job_id, e);
+ error!("{}", msg);
+ Status::internal(msg)
+ })?;
+ let status: JobStatus = match status {
+ Some(status) => status,
+ None => {
+ let msg = format!("Error getting status for job {}!", job_id);
+ error!("{}", msg);
+ Err(Status::internal(msg))?
+ }
+ };
+ let status: job_status::Status = match status.status {
+ Some(status) => status,
+ None => {
+ let msg = format!("Error getting status for job {}!", job_id);
+ error!("{}", msg);
+ Err(Status::internal(msg))?
+ }
+ };
+ let completed = match status {
+ job_status::Status::Queued(_) => continue,
+ job_status::Status::Running(_) => continue,
+ job_status::Status::Failed(e) => {
+ Err(Status::internal(format!("Error building plan: {}", e.error)))?
+ }
+ job_status::Status::Completed(comp) => comp
+ };
+ let mut fieps: Vec<_> = vec![];
+ for loc in completed.partition_location.iter() {
+ let fetch = if let Some(ref id) = loc.partition_id {
+ let fetch = protobuf::FetchPartition {
+ job_id: id.job_id.clone(),
+ stage_id: id.stage_id,
+ partition_id: id.partition_id,
+ path: loc.path.clone()
+ };
+ protobuf::Action {
+ action_type: Some(protobuf::action::ActionType::FetchPartition(fetch)),
+ settings: vec![],
+ }
+ } else {
+ Err(Status::internal(format!("Error getting partition it")))?
+ };
+ let authority = if let Some(ref md) = loc.executor_meta {
+ // pub id: ::prost::alloc::string::String,
+ format!("{}:{}", md.host, md.port)
+ } else {
+ Err(Status::internal(format!("Error getting location")))?
+ };
+ if let Some(ref stats) = loc.partition_stats {
+ num_rows += stats.num_rows;
+ num_bytes += stats.num_bytes;
+ // pub num_batches: i64,
+ } else {
+ Err(Status::internal(format!("Error getting stats")))?
+ }
+ let loc = Location { uri: format!("grpc+tcp://{}", authority) };
+ let buf = fetch.encode_to_vec();
+ let ticket = Ticket { ticket: buf };
+ let fiep = FlightEndpoint {
+ ticket: Some(ticket),
+ location: vec![loc],
+ };
+ fieps.push(fiep);
+ }
+ break fieps;
Review Comment:
It's pretty neat. You can actually return a value from a `loop`, and that's what this is doing. I wasn't aware of it either, until this PR. https://doc.rust-lang.org/rust-by-example/flow_control/loop/return.html
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