zeroshade commented on code in PR #33965:
URL: https://github.com/apache/arrow/pull/33965#discussion_r1094751946


##########
go/parquet/file/record_reader.go:
##########
@@ -751,14 +751,15 @@ type byteArrayRecordReader struct {
        valueBuf []parquet.ByteArray
 }
 
-func newByteArrayRecordReader(descr *schema.Column, info LevelInfo, mem 
memory.Allocator, bufferPool *sync.Pool) RecordReader {
+func newByteArrayRecordReader(descr *schema.Column, info LevelInfo, dtype 
arrow.DataType, mem memory.Allocator, bufferPool *sync.Pool) RecordReader {
        if mem == nil {
                mem = memory.DefaultAllocator
        }
 
-       dt := arrow.BinaryTypes.Binary
-       if descr.LogicalType().Equals(schema.StringLogicalType{}) {
-               dt = arrow.BinaryTypes.String
+       dt, ok := dtype.(arrow.BinaryDataType)
+       // arrow.DecimalType will also come through here, which we want to 
treat as binary
+       if !ok {
+               dt = arrow.BinaryTypes.Binary

Review Comment:
   hmm, okay that's fair. I think it's fine as is for now. I agree that if the 
stored schema says `arrow.LargeString` you should get that back.



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