RussellSpitzer edited a comment on issue #1735:
URL: https://github.com/apache/iceberg/issues/1735#issuecomment-725609835
Overview of bugs found: #1744
**Example of Bug 1**
```
From (A, B, C, D { foo, bar } )
Project (A, B, C, D {})
Returns
(A, B, C) // Missing D which was required in the projection
```
**Example of Bug 2**
```
From (A, B, C, D {foo, bar, baz {}} ) // Starting with D containing an field
baz which is empty
Project (A)
Returns
(A, D{ baz {} }) // Includes D even though it was not requested
```
In combination these sometimes negate each other ~ kinda
**Example of interaction of bugs**
```
From (A, B, C, D {foo, bar, baz{}})
Project (A, B, C, D{})
Returns
(A, B, C, D{ baz{} }) // D is present although with an unrequested field but
this satisfies the projection
```
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