fix: tombstone replay

Signed-off-by: Robert Pack <robstar.pack@gmail.com>

.gitignore

@@ -22,7 +22,6 @@ __blobstorage__
 .githubchangeloggenerator.cache.log
 .githubchangeloggenerator.cache/
 .githubchangeloggenerator*
-data
 .zed/
 
 # Add all Cargo.lock files except for those in binary crates

crates/core/src/kernel/snapshot_next/lazy.rs

@@ -9,23 +9,24 @@ use delta_kernel::actions::set_transaction::{SetTransactionMap, SetTransactionSc
 use delta_kernel::actions::{get_log_schema, REMOVE_NAME};
 use delta_kernel::actions::{Metadata, Protocol, SetTransaction};
 use delta_kernel::engine::arrow_data::ArrowEngineData;
+use delta_kernel::engine::arrow_expression::evaluate_expression;
 use delta_kernel::engine::default::executor::tokio::{
     TokioBackgroundExecutor, TokioMultiThreadExecutor,
 };
 use delta_kernel::engine::default::DefaultEngine;
 use delta_kernel::log_segment::LogSegment;
-use delta_kernel::schema::Schema;
+use delta_kernel::schema::{DataType, Schema};
 use delta_kernel::snapshot::Snapshot as SnapshotInner;
 use delta_kernel::table_properties::TableProperties;
-use delta_kernel::{Engine, Expression, ExpressionRef, Table, Version};
+use delta_kernel::{Engine, Expression, ExpressionHandler, ExpressionRef, Table, Version};
 use itertools::Itertools;
 use object_store::path::Path;
 use object_store::ObjectStore;
 use url::Url;
 
 use super::cache::CommitCacheObjectStore;
 use super::{replay_file_actions, Snapshot};
-use crate::kernel::{Action, CommitInfo};
+use crate::kernel::{Action, CommitInfo, ARROW_HANDLER};
 use crate::{DeltaResult, DeltaTableError};
 
 // TODO: avoid repetitive parsing of json stats
@@ -94,11 +95,8 @@ impl Snapshot for LazySnapshot {
     }
 
     fn tombstones(&self) -> DeltaResult<Box<dyn Iterator<Item = DeltaResult<RecordBatch>>>> {
-        static META_PREDICATE: LazyLock<Option<ExpressionRef>> = LazyLock::new(|| {
-            Some(Arc::new(
-                Expression::column([REMOVE_NAME, "path"]).is_not_null(),
-            ))
-        });
+        static META_PREDICATE: LazyLock<ExpressionRef> =
+            LazyLock::new(|| Arc::new(Expression::column([REMOVE_NAME, "path"]).is_not_null()));
         let read_schema = get_log_schema().project(&[REMOVE_NAME])?;
         Ok(Box::new(
             self.inner
@@ -107,9 +105,23 @@ impl Snapshot for LazySnapshot {
                     self.engine.as_ref(),
                     read_schema.clone(),
                     read_schema,
-                    META_PREDICATE.clone(),
+                    Some(META_PREDICATE.clone()),
                 )?
-                .map_ok(|(d, _)| Ok(RecordBatch::from(ArrowEngineData::try_from_engine_data(d)?)))
+                .map_ok(|(d, _)| {
+                    let batch = RecordBatch::from(ArrowEngineData::try_from_engine_data(d)?);
+                    let selection = evaluate_expression(
+                        META_PREDICATE.as_ref(),
+                        &batch,
+                        Some(&DataType::BOOLEAN),
+                    )?;
+                    let filter = selection
+                        .as_any()
+                        .downcast_ref::<BooleanArray>()
+                        .ok_or_else(|| {
+                            DeltaTableError::generic("failed to downcast to BooleanArray")
+                        })?;
+                    Ok(filter_record_batch(&batch, filter)?)
+                })
                 .flatten(),
         ))
     }
@@ -247,37 +259,46 @@ impl LazySnapshot {
 
 #[cfg(test)]
 mod tests {
-    use deltalake_test::acceptance::{read_dat_case, TestCaseInfo};
+    use delta_kernel::schema::StructType;
+    use deltalake_test::utils::*;
     use deltalake_test::TestResult;
 
-    use super::super::tests::get_dat_dir;
     use super::*;
 
     async fn load_snapshot() -> TestResult<()> {
-        // some comment
-        let mut dat_dir = get_dat_dir();
-        dat_dir.push("multi_partitioned");
-
-        let dat_info: TestCaseInfo = read_dat_case(dat_dir)?;
-        let table_info = dat_info.table_summary()?;
-
-        let table = Table::try_from_uri(dat_info.table_root()?)?;
-
-        let snapshot = LazySnapshot::try_new(
-            table,
-            Arc::new(object_store::local::LocalFileSystem::default()),
-            None,
-        )
-        .await?;
-
-        assert_eq!(snapshot.version(), table_info.version);
-        assert_eq!(
-            (
-                snapshot.protocol().min_reader_version(),
-                snapshot.protocol().min_writer_version()
-            ),
-            (table_info.min_reader_version, table_info.min_writer_version)
-        );
+        let ctx = IntegrationContext::new(Box::<LocalStorageIntegration>::default())?;
+        ctx.load_table(TestTables::Simple).await?;
+
+        let store = ctx
+            .table_builder(TestTables::Simple)
+            .build_storage()?
+            .object_store(None);
+        let table = Table::try_from_uri("memory:///")?;
+        let snapshot = LazySnapshot::try_new(table, store, None).await?;
+
+        let schema_string = r#"{"type":"struct","fields":[{"name":"id","type":"long","nullable":true,"metadata":{}}]}"#;
+        let expected: StructType = serde_json::from_str(schema_string)?;
+        assert_eq!(snapshot.schema(), &expected);
+
+        let infos = snapshot.commit_infos(None, None)?.collect_vec();
+        assert_eq!(infos.len(), 5);
+
+        let tombstones: Vec<_> = snapshot.tombstones()?.try_collect()?;
+        let num_tombstones = tombstones.iter().map(|b| b.num_rows() as i64).sum::<i64>();
+        assert_eq!(num_tombstones, 31);
+
+        let expected = vec![
+            "part-00000-2befed33-c358-4768-a43c-3eda0d2a499d-c000.snappy.parquet",
+            "part-00000-c1777d7d-89d9-4790-b38a-6ee7e24456b1-c000.snappy.parquet",
+            "part-00001-7891c33d-cedc-47c3-88a6-abcfb049d3b4-c000.snappy.parquet",
+            "part-00004-315835fe-fb44-4562-98f6-5e6cfa3ae45d-c000.snappy.parquet",
+            "part-00007-3a0e4727-de0d-41b6-81ef-5223cf40f025-c000.snappy.parquet",
+        ];
+        let file_names: Vec<_> = snapshot
+            .logical_files_view(None)?
+            .map_ok(|f| f.path().to_owned())
+            .try_collect()?;
+        assert_eq!(file_names, expected);
 
         Ok(())
     }

crates/core/src/kernel/snapshot_next/mod.rs

@@ -361,24 +361,13 @@ fn scan_as_log_data(
 
 #[cfg(test)]
 mod tests {
-    use std::{future::Future, path::PathBuf, pin::Pin};
+    use std::{future::Future, pin::Pin};
 
     use delta_kernel::Table;
     use deltalake_test::utils::*;
 
     use super::*;
 
-    pub(super) fn get_dat_dir() -> PathBuf {
-        let d = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
-        let mut rep_root = d
-            .parent()
-            .and_then(|p| p.parent())
-            .expect("valid directory")
-            .to_path_buf();
-        rep_root.push("dat/out/reader_tests/generated");
-        rep_root
-    }
-
     fn get_lazy(
         ctx: &IntegrationContext,
         table: TestTables,