feat: datafusion table provider next

Signed-off-by: Robert Pack <[email protected]>

Author: roeap

crates/core/examples/df_scan.rs

@@ -0,0 +1,57 @@
+use std::sync::Arc;
+
+use arrow_cast::pretty::print_batches;
+use datafusion::datasource::TableProvider;
+use datafusion::physical_plan::collect_partitioned;
+use datafusion::prelude::SessionContext;
+use deltalake_core::delta_datafusion::engine::DataFusionEngine;
+use deltalake_core::kernel::Snapshot;
+use deltalake_core::DeltaTableError;
+use url::Url;
+
+static CASES: &[&str] = &[
+    "./dat/v0.0.3/reader_tests/generated/all_primitive_types/delta/", // 0
+    "./dat/v0.0.3/reader_tests/generated/basic_append/delta/",        // 1
+    "./dat/v0.0.3/reader_tests/generated/basic_partitioned/delta/",   // 2
+    "./dat/v0.0.3/reader_tests/generated/cdf/delta/",                 // 3
+    "./dat/v0.0.3/reader_tests/generated/check_constraints/delta/",   // 4
+    "./dat/v0.0.3/reader_tests/generated/column_mapping/delta/",      // 5
+    "./dat/v0.0.3/reader_tests/generated/deletion_vectors/delta/",    // 6
+    "./dat/v0.0.3/reader_tests/generated/generated_columns/delta/",   // 7
+    "./dat/v0.0.3/reader_tests/generated/iceberg_compat_v1/delta/",   // 8
+    "./dat/v0.0.3/reader_tests/generated/multi_partitioned/delta/",   // 9
+    "./dat/v0.0.3/reader_tests/generated/multi_partitioned_2/delta/", // 10
+    "./dat/v0.0.3/reader_tests/generated/nested_types/delta/",        // 11
+    "./dat/v0.0.3/reader_tests/generated/no_replay/delta/",           // 12
+    "./dat/v0.0.3/reader_tests/generated/no_stats/delta/",            // 13
+    "./dat/v0.0.3/reader_tests/generated/partitioned_with_null/delta/", // 14
+    "./dat/v0.0.3/reader_tests/generated/stats_as_struct/delta/",     // 15
+    "./dat/v0.0.3/reader_tests/generated/timestamp_ntz/delta/",       // 16
+    "./dat/v0.0.3/reader_tests/generated/with_checkpoint/delta/",     // 17
+    "./dat/v0.0.3/reader_tests/generated/with_schema_change/delta/",  // 18
+];
+
+#[tokio::main(flavor = "multi_thread", worker_threads = 4)]
+async fn main() -> Result<(), DeltaTableError> {
+    let session = Arc::new(SessionContext::new());
+    let engine = DataFusionEngine::new_from_session(&session.state());
+
+    let path = std::fs::canonicalize(CASES[5]).unwrap();
+    let table_url = Url::from_directory_path(path).unwrap();
+    let snapshot =
+        Snapshot::try_new_with_engine(engine.clone(), table_url, Default::default(), None).await?;
+
+    let state = session.state_ref().read().clone();
+
+    let plan = snapshot.scan(&state, None, &[], None).await?;
+
+    let batches: Vec<_> = collect_partitioned(plan, session.task_ctx())
+        .await?
+        .into_iter()
+        .flatten()
+        .collect();
+
+    print_batches(&batches).unwrap();
+
+    Ok(())
+}

crates/core/src/delta_datafusion/engine/expressions/mod.rs

@@ -0,0 +1,5 @@
+pub(crate) use self::to_df::*;
+pub(crate) use self::to_kernel::*;
+
+mod to_df;
+mod to_kernel;