Merge pull request #878 from Altinity/backports/25.3/79844_icebergS3_fix_count

Antalya 25.3 : Backport of ClickHouse#79844 - ObjectStorageCluster table function return wrong count() after applyTrivialCount optimized

Author: Enmk

tests/integration/test_storage_iceberg/test.py

@@ -849,6 +849,8 @@ def make_query_from_table(alt_syntax=False):
     count_secondary_subqueries(started_cluster, query_id_pure_table_engine_with_type_in_nc, 0, "table engine with storage type in named collection")
     count_secondary_subqueries(started_cluster, query_id_pure_table_engine_cluster_with_type_in_nc, 1, "table engine with cluster setting with storage type in named collection")
 
+    # write 3 times
+    assert int(instance.query(f"SELECT count() FROM {table_function_expr_cluster}")) == 100 * 3
 
 @pytest.mark.parametrize("format_version", ["1", "2"])
 @pytest.mark.parametrize("storage_type", ["s3", "azure", "local"])