Error reporting is not sufficient

Hi,

My app gets following exception up on basic select all from a single table:

```
ManyErrors [
BeamRowReadError {brreColumn = Nothing, brreError = ColumnErrorInternal "Prelude.read: no parse"},
BeamRowReadError {brreColumn = Just 17, brreError = ColumnTypeMismatch {ctmHaskellType = "Null", ctmSQLType = "TEXT", ctmMessage = "conversion failed: data is not null"}},
BeamRowReadError {brreColumn = Just 0, brreError = ColumnTypeMismatch {ctmHaskellType = "Null", ctmSQLType = "TEXT", ctmMessage = "conversion failed: data is not null"}}]
```

I would like to see table name and a showed raw row which has problem values.