crates/sqllogictest/src/engine/datafusion.rs

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// distributed with this work for additional information
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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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use std::path::{Path, PathBuf};
use std::sync::Arc;

use anyhow::{anyhow, Context};
use datafusion::catalog::CatalogProvider;
use datafusion::prelude::{SessionConfig, SessionContext};
use datafusion_sqllogictest::DataFusion;
use indicatif::ProgressBar;
use sqllogictest::runner::AsyncDB;
use toml::Table as TomlTable;

use crate::engine::Engine;
use crate::error::Result;

pub struct DataFusionEngine {
    datafusion: DataFusion,
}

#[async_trait::async_trait]
impl Engine for DataFusionEngine {
    async fn new(config: TomlTable) -> Result<Self> {
        let session_config = SessionConfig::new().with_target_partitions(4);
        let ctx = SessionContext::new_with_config(session_config);
        ctx.register_catalog("default", Self::create_catalog(&config).await?);

        Ok(Self {
            datafusion: DataFusion::new(ctx, PathBuf::from("testdata"), ProgressBar::new(100)),
        })
    }

    async fn run_slt_file(&mut self, path: &Path) -> Result<()> {
        let content = std::fs::read_to_string(path)
            .with_context(|| format!("Failed to read slt file {:?}", path))
            .map_err(|e| anyhow!(e))?;

        self.datafusion
            .run(content.as_str())
            .await
            .with_context(|| format!("Failed to run slt file {:?}", path))
            .map_err(|e| anyhow!(e))?;

        Ok(())
    }
}

impl DataFusionEngine {
    async fn create_catalog(_: &TomlTable) -> anyhow::Result<Arc<dyn CatalogProvider>> {
        todo!()
    }
}