okalinin commented on a change in pull request #1370: DRILL-5797: Use Parquet 
new reader in all non-complex column queries
URL: https://github.com/apache/drill/pull/1370#discussion_r201663784
 
 

 ##########
 File path: 
exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/AbstractParquetScanBatchCreator.java
 ##########
 @@ -191,4 +201,42 @@ protected AbstractDrillFileSystemManager(OperatorContext 
operatorContext) {
     protected abstract DrillFileSystem get(Configuration config, String path) 
throws ExecutionSetupException;
   }
 
+  /**
+   * Check whether any of queried columns is nested or repetitive.
+   *
+   * @param footer  Parquet file schema
+   * @param columns list of query SchemaPath objects
+   */
+  public static boolean containsComplexColumn(ParquetMetadata footer, 
List<SchemaPath> columns) {
 
 Review comment:
   Method moved to ParquetReaderUtility as per discussion below.

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