dot-separated column names show nulls instead of data on Antalya 25.8.12.20747

[alsugiliazova]

Describe the bug

You can create iceberg table with dot-separated column as you want.

I followed this to create local iceberg table https://github.com/Altinity/ice/tree/master/examples/localfileio.
I had to make this changes in order to work with latest Antalya (altinity/clickhouse-server:25.8.12.20747.altinityantalya):
https://altinity.slack.com/archives/C07NZ441PK9/p1767709246868069?thread_ts=1767649655.440519&cid=C07NZ441PK9

CREATE DATABASE ice2
ENGINE = DataLakeCatalog('http://localhost:5000')
SETTINGS catalog_type = 'rest', vended_credentials = false, warehouse = 'warehouse'

SELECT *
FROM ice2.`flowers.iris`
LIMIT 10

Query id: 1df7b5c1-34b0-4ce8-a347-1993f3d76137

    ┌─sepal.length─┬─sepal.width─┬─petal.length─┬─petal.width─┬─variety─┐
 1. │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │ Setosa  │
 2. │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │ Setosa  │
 3. │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │ Setosa  │
 4. │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │ Setosa  │
 5. │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │ Setosa  │
 6. │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │ Setosa  │
 7. │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │ Setosa  │
 8. │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │ Setosa  │
 9. │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │ Setosa  │
10. │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │         ᴺᵁᴸᴸ │        ᴺᵁᴸᴸ │ Setosa  │
    └──────────────┴─────────────┴──────────────┴─────────────┴─────────┘

10 rows in set. Elapsed: 0.029 sec. 

[alsugiliazova]

On 25.8 upstream data is selected correctly.

[alsugiliazova]

First appeared here Altinity/ice#47

[alsugiliazova]

Previous Antalya did not had this bug altinity/clickhouse-server:25.8.9.20496.altinityantalya

SELECT *
FROM `flowers.iris`
LIMIT 10

Query id: d312656f-e22d-4a06-aa31-6df7cc0b6d27

    ┌─sepal.length─┬─sepal.width─┬─petal.length─┬─petal.width─┬─variety─┐
 1. │          5.1 │         3.5 │          1.4 │         0.2 │ Setosa  │
 2. │          4.9 │           3 │          1.4 │         0.2 │ Setosa  │
 3. │          4.7 │         3.2 │          1.3 │         0.2 │ Setosa  │
 4. │          4.6 │         3.1 │          1.5 │         0.2 │ Setosa  │
 5. │            5 │         3.6 │          1.4 │         0.2 │ Setosa  │
 6. │          5.4 │         3.9 │          1.7 │         0.4 │ Setosa  │
 7. │          4.6 │         3.4 │          1.4 │         0.3 │ Setosa  │
 8. │            5 │         3.4 │          1.5 │         0.2 │ Setosa  │
 9. │          4.4 │         2.9 │          1.4 │         0.2 │ Setosa  │
10. │          4.9 │         3.1 │          1.5 │         0.1 │ Setosa  │
    └──────────────┴─────────────┴──────────────┴─────────────┴─────────┘

10 rows in set. Elapsed: 0.019 sec. 

SELECT version()

Query id: e8ee9436-24e3-4599-b857-cbad338dc71d

   ┌─version()────────────────────┐
1. │ 25.8.9.20496.altinityantalya │
   └──────────────────────────────┘

1 row in set. Elapsed: 0.004 sec.