[GitHub] [arrow] alamb commented on a change in pull request #9214: ARROW-11268: [Rust][DataFusion] MemTable::load output partition support

[GitBox <gi...@apache.org>]

alamb commented on a change in pull request #9214:
URL: https://github.com/apache/arrow/pull/9214#discussion_r559487823



##########
File path: rust/benchmarks/src/bin/tpch.rs
##########
@@ -66,6 +66,10 @@ struct BenchmarkOpt {
     /// Load the data into a MemTable before executing the query
     #[structopt(short = "m", long = "mem-table")]
     mem_table: bool,
+
+    /// Number of partitions to use when using MemTable

Review comment:
       ```suggestion
       /// Number of partitions to create when using MemTable as input
   ```

##########
File path: rust/datafusion/src/datasource/memory.rs
##########
@@ -126,6 +134,28 @@ impl MemTable {
             data.push(result);
         }
 
+        let exec = MemoryExec::try_new(&data, schema.clone(), None)?;
+
+        if let Some(num_partitions) = output_partitions {

Review comment:
       👍 




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