Fix parquet reader

Author: rui-mo

velox/dwio/parquet/reader/ParquetReader.cpp

@@ -669,8 +669,7 @@ ParquetRowReader::ParquetRowReader(
     return; // TODO
   }
   ParquetParams params(pool_, readerBase_->fileMetaData());
-  auto columnSelector = std::make_shared<ColumnSelector>(
-      ColumnSelector::apply(options_.getSelector(), readerBase_->schema()));
+  auto columnSelector = options_.getSelector();
   columnReader_ = ParquetColumnReader::build(
       ReaderBase::createTypeWithId(
           columnSelector->getSchemaWithId(),

velox/type/Subfield.h

@@ -45,7 +45,7 @@ struct Separators {
 
   char backSlash = '\\';
   char closeBracket = ']';
-  char dot = '.';
+  char dot = '\0';
   char openBracket = '[';
   char quote = '\"';
   char wildCard = '*';