Incorrect handling of column names

[timvw]

Describe the bug
Column name (casing) is not handled correctly.

To Reproduce
Have a (parquet) file with a column "featureValue". A simple "select * from alltypes_plain" returns

+------------+
| featureValue |
+------------+
| 0.0000 |

When running "select * from alltypes_plain where featureValue <> 0" gives an error:

Error: SchemaError(FieldNotFound { field: Column { relation: None, name: "featurevalue" }, valid_fields: Some(Column { relation: Some("alltypes_plain"), name: "featureValue" }]) })

Expected behavior
The column is correctly discovered as "featureValue" and not "featurevalue"

[timvw]

Some further investigation makes me believes this is not a bug but consistent with postgres behavior.

select * from alltypes_plain where "featureValue" <> 0 works as expected.