ARROW-14351: [IR] Add projection list to Source node

- Add projection field indices to Source - Regenerate code Closes apache#11439 from cpcloud/ARROW-14351 Authored-by: Phillip Cloud <[email protected]> Signed-off-by: Benjamin Kietzman <[email protected]>
meta-soul · Oct 29, 2021 · e8270d7 · e8270d7
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commit e8270d7
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diff --git a/cpp/src/generated/Relation_generated.h b/cpp/src/generated/Relation_generated.h
diff --git a/experimental/computeir/Relation.fbs b/experimental/computeir/Relation.fbs
@@ -186,6 +186,15 @@ table Source {
   filter: Expression;
   /// Schemas are explicitly optional
   schema: org.apache.arrow.flatbuf.Schema;
+  /// An optional list of field indices indicating which columns should be read
+  /// from the source. Columns excluded from this listing will instead be replaced
+  /// with all-null placeholders to guarantee that the schema of the source is
+  /// unaffected by this projection.
+  ///
+  /// A missing value indicates all columns should be read.
+  ///
+  /// The behavior of an empty list is undefined.
+  projection: [FieldIndex];
 }
 
 /// The varieties of relations