feat: Add more fields in FileScanTask (apache#609)

Signed-off-by: Xuanwo <[email protected]>

Author: Xuanwo

crates/iceberg/src/arrow/reader.rs

@@ -133,7 +133,7 @@ impl ArrowReader {
                     |(file_scan_task, file_io, tx)| async move {
                         match file_scan_task {
                             Ok(task) => {
-                                let file_path = task.data_file_path().to_string();
+                                let file_path = task.data_file_path.to_string();
 
                                 spawn(async move {
                                     Self::process_file_scan_task(
@@ -171,7 +171,7 @@ impl ArrowReader {
     ) -> Result<()> {
         // Get the metadata for the Parquet file we need to read and build
         // a reader for the data within
-        let parquet_file = file_io.new_input(task.data_file_path())?;
+        let parquet_file = file_io.new_input(&task.data_file_path)?;
         let (parquet_metadata, parquet_reader) =
             try_join!(parquet_file.metadata(), parquet_file.reader())?;
         let parquet_file_reader = ArrowFileReader::new(parquet_metadata, parquet_reader);
@@ -187,8 +187,8 @@ impl ArrowReader {
         // Create a projection mask for the batch stream to select which columns in the
         // Parquet file that we want in the response
         let projection_mask = Self::get_arrow_projection_mask(
-            task.project_field_ids(),
-            task.schema(),
+            &task.project_field_ids,
+            &task.schema,
             record_batch_stream_builder.parquet_schema(),
             record_batch_stream_builder.schema(),
         )?;
@@ -198,7 +198,7 @@ impl ArrowReader {
             record_batch_stream_builder = record_batch_stream_builder.with_batch_size(batch_size);
         }
 
-        if let Some(predicate) = task.predicate() {
+        if let Some(predicate) = &task.predicate {
             let (iceberg_field_ids, field_id_map) = Self::build_field_id_set_and_map(
                 record_batch_stream_builder.parquet_schema(),
                 predicate,
@@ -218,7 +218,7 @@ impl ArrowReader {
                     predicate,
                     record_batch_stream_builder.metadata(),
                     &field_id_map,
-                    task.schema(),
+                    &task.schema,
                 )?;
 
                 selected_row_groups = Some(result);

crates/iceberg/src/scan.rs

@@ -36,8 +36,8 @@ use crate::io::object_cache::ObjectCache;
 use crate::io::FileIO;
 use crate::runtime::spawn;
 use crate::spec::{
-    DataContentType, ManifestContentType, ManifestEntryRef, ManifestFile, ManifestList, Schema,
-    SchemaRef, SnapshotRef, TableMetadataRef,
+    DataContentType, DataFileFormat, ManifestContentType, ManifestEntryRef, ManifestFile,
+    ManifestList, Schema, SchemaRef, SnapshotRef, TableMetadataRef,
 };
 use crate::table::Table;
 use crate::utils::available_parallelism;
@@ -529,14 +529,19 @@ impl ManifestEntryContext {
     /// created from it
     fn into_file_scan_task(self) -> FileScanTask {
         FileScanTask {
-            data_file_path: self.manifest_entry.file_path().to_string(),
             start: 0,
             length: self.manifest_entry.file_size_in_bytes(),
+            record_count: Some(self.manifest_entry.record_count()),
+
+            data_file_path: self.manifest_entry.file_path().to_string(),
+            data_file_content: self.manifest_entry.content_type(),
+            data_file_format: self.manifest_entry.file_format(),
+
+            schema: self.snapshot_schema,
             project_field_ids: self.field_ids.to_vec(),
             predicate: self
                 .bound_predicates
                 .map(|x| x.as_ref().snapshot_bound_predicate.clone()),
-            schema: self.snapshot_schema,
         }
     }
 }
@@ -854,35 +859,30 @@ impl ExpressionEvaluatorCache {
 /// A task to scan part of file.
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct FileScanTask {
-    data_file_path: String,
-    start: u64,
-    length: u64,
-    project_field_ids: Vec<i32>,
+    /// The start offset of the file to scan.
+    pub start: u64,
+    /// The length of the file to scan.
+    pub length: u64,
+    /// The number of records in the file to scan.
+    ///
+    /// This is an optional field, and only available if we are
+    /// reading the entire data file.
+    pub record_count: Option<u64>,
+
+    /// The data file path corresponding to the task.
+    pub data_file_path: String,
+    /// The content type of the file to scan.
+    pub data_file_content: DataContentType,
+    /// The format of the file to scan.
+    pub data_file_format: DataFileFormat,
+
+    /// The schema of the file to scan.
+    pub schema: SchemaRef,
+    /// The field ids to project.
+    pub project_field_ids: Vec<i32>,
+    /// The predicate to filter.
     #[serde(skip_serializing_if = "Option::is_none")]
-    predicate: Option<BoundPredicate>,
-    schema: SchemaRef,
-}
-
-impl FileScanTask {
-    /// Returns the data file path of this file scan task.
-    pub fn data_file_path(&self) -> &str {
-        &self.data_file_path
-    }
-
-    /// Returns the project field id of this file scan task.
-    pub fn project_field_ids(&self) -> &[i32] {
-        &self.project_field_ids
-    }
-
-    /// Returns the predicate of this file scan task.
-    pub fn predicate(&self) -> Option<&BoundPredicate> {
-        self.predicate.as_ref()
-    }
-
-    /// Returns the schema id of this file scan task.
-    pub fn schema(&self) -> &Schema {
-        &self.schema
-    }
+    pub predicate: Option<BoundPredicate>,
 }
 
 #[cfg(test)]
@@ -1219,17 +1219,17 @@ mod tests {
 
         assert_eq!(tasks.len(), 2);
 
-        tasks.sort_by_key(|t| t.data_file_path().to_string());
+        tasks.sort_by_key(|t| t.data_file_path.to_string());
 
         // Check first task is added data file
         assert_eq!(
-            tasks[0].data_file_path(),
+            tasks[0].data_file_path,
             format!("{}/1.parquet", &fixture.table_location)
         );
 
         // Check second task is existing data file
         assert_eq!(
-            tasks[1].data_file_path(),
+            tasks[1].data_file_path,
             format!("{}/3.parquet", &fixture.table_location)
         );
     }
@@ -1582,22 +1582,28 @@ mod tests {
         );
         let task = FileScanTask {
             data_file_path: "data_file_path".to_string(),
+            data_file_content: DataContentType::Data,
             start: 0,
             length: 100,
             project_field_ids: vec![1, 2, 3],
             predicate: None,
             schema: schema.clone(),
+            record_count: Some(100),
+            data_file_format: DataFileFormat::Parquet,
         };
         test_fn(task);
 
         // with predicate
         let task = FileScanTask {
             data_file_path: "data_file_path".to_string(),
+            data_file_content: DataContentType::Data,
             start: 0,
             length: 100,
             project_field_ids: vec![1, 2, 3],
             predicate: Some(BoundPredicate::AlwaysTrue),
             schema,
+            record_count: None,
+            data_file_format: DataFileFormat::Avro,
         };
         test_fn(task);
     }

crates/iceberg/src/spec/manifest.rs

@@ -23,7 +23,9 @@ use std::sync::Arc;
 
 use apache_avro::{from_value, to_value, Reader as AvroReader, Writer as AvroWriter};
 use bytes::Bytes;
+use serde_derive::{Deserialize, Serialize};
 use serde_json::to_vec;
+use serde_with::{DeserializeFromStr, SerializeDisplay};
 use typed_builder::TypedBuilder;
 
 use self::_const_schema::{manifest_schema_v1, manifest_schema_v2};
@@ -866,6 +868,12 @@ impl ManifestEntry {
         &self.data_file.file_path
     }
 
+    /// Data file record count of the manifest entry.
+    #[inline]
+    pub fn record_count(&self) -> u64 {
+        self.data_file.record_count
+    }
+
     /// Inherit data from manifest list, such as snapshot id, sequence number.
     pub(crate) fn inherit_data(&mut self, snapshot_entry: &ManifestFile) {
         if self.snapshot_id.is_none() {
@@ -1141,7 +1149,7 @@ impl DataFile {
 }
 /// Type of content stored by the data file: data, equality deletes, or
 /// position deletes (all v1 files are data files)
-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[derive(Debug, PartialEq, Eq, Clone, Copy, Serialize, Deserialize)]
 pub enum DataContentType {
     /// value: 0
     Data = 0,
@@ -1168,7 +1176,7 @@ impl TryFrom<i32> for DataContentType {
 }
 
 /// Format of this data.
-#[derive(Debug, PartialEq, Eq, Clone, Copy)]
+#[derive(Debug, PartialEq, Eq, Clone, Copy, SerializeDisplay, DeserializeFromStr)]
 pub enum DataFileFormat {
     /// Avro file format: <https://avro.apache.org/>
     Avro,