Fixed error

src/io/parquet/read/deserialize/binary/basic.rs

@@ -68,7 +68,8 @@ pub(super) struct Required<'a> {
 
 impl<'a> Required<'a> {
     pub fn new(page: &'a DataPage) -> Self {
-        let values = SizedBinaryIter::new(page.buffer(), page.num_values());
+        let (_, _, values) = utils::split_buffer(page);
+        let values = SizedBinaryIter::new(values, page.num_values());
 
         Self { values }
     }

src/io/parquet/read/deserialize/binary/nested.rs

@@ -120,6 +120,7 @@ impl<'a, O: Offset> utils::Decoder<'a> for BinaryDecoder<O> {
                 }
             }
             State::OptionalDictionary(page_validity, page_values) => {
+                println!("optional_dict");
                 let dict_values = page_values.dict.values();
                 let dict_offsets = page_values.dict.offsets();
 

src/io/parquet/read/deserialize/boolean/basic.rs

@@ -55,8 +55,9 @@ struct FilteredRequired<'a> {
 
 impl<'a> FilteredRequired<'a> {
     pub fn new(page: &'a DataPage) -> Self {
+        let (_, _, values) = utils::split_buffer(page);
         // todo: replace this by an iterator over slices, for faster deserialization
-        let values = BitmapIter::new(page.buffer(), 0, page.num_values());
+        let values = BitmapIter::new(values, 0, page.num_values());
 
         let rows = get_selected_rows(page);
         let values = SliceFilteredIter::new(values, rows);

src/io/parquet/read/deserialize/boolean/nested.rs

@@ -25,8 +25,9 @@ struct Required<'a> {
 
 impl<'a> Required<'a> {
     pub fn new(page: &'a DataPage) -> Self {
+        let (_, _, values) = utils::split_buffer(page);
         Self {
-            values: page.buffer(),
+            values,
             offset: 0,
             length: page.num_values(),
         }