[NSE-1045] Release ColumnarBatch underlying buffer immediately after nativeConvertColumnarToRow converter finish

native-sql-engine/core/src/main/scala/com/intel/oap/execution/ArrowColumnarToRowExec.scala

@@ -140,6 +140,9 @@ case class ArrowColumnarToRowExec(child: SparkPlan) extends ColumnarToRowTransit
             arrowSchema, batch.numRows, bufAddrs.toArray, bufSizes.toArray,
             SparkMemoryUtils.contextMemoryPool().getNativeInstanceId)
 
+          // Because nativeConvertColumnarToRow didn't need Buffers of batch anymore, so close immediately
+//          batch.close()
+
           convertTime += NANOSECONDS.toMillis(System.nanoTime() - beforeConvert)
 
           new Iterator[InternalRow] {

native-sql-engine/cpp/src/operators/columnar_to_row_converter.cc

@@ -608,6 +608,9 @@ arrow::Status ColumnarToRowConverter::Write() {
                support_avx512_);
   }
 
+  // Because didn't need rb_ anymore here, so reset immediately.
+  rb_.reset();
+
   return arrow::Status::OK();
 }