refactor: Unified query for hilbert and linear clustering information (#17618)

* refactor: Unified query for hilbert and linear clustering information

* make lint

* fix

* fix

* fix

* refactor: use variant column to unify the schema

* fix: clustering_information related logic tests

* fix

* fix

* fix test

---------

Co-authored-by: dantengsky <[email protected]>

Author: zhyass

src/query/service/src/table_functions/table_function_factory.rs

@@ -29,7 +29,6 @@ use databend_common_storages_fuse::table_functions::FuseTimeTravelSizeFunc;
 use databend_common_storages_fuse::table_functions::FuseVacuumDropAggregatingIndex;
 use databend_common_storages_fuse::table_functions::FuseVacuumDropInvertedIndex;
 use databend_common_storages_fuse::table_functions::FuseVacuumTemporaryTable;
-use databend_common_storages_fuse::table_functions::HilbertClusteringInfoFunc;
 use databend_common_storages_fuse::table_functions::SetCacheCapacity;
 use databend_common_storages_fuse::table_functions::TableFunctionTemplate;
 use databend_common_storages_iceberg::IcebergInspectTable;
@@ -208,14 +207,6 @@ impl TableFunctionFactory {
             ),
         );
 
-        creators.insert(
-            "hilbert_clustering_information".to_string(),
-            (
-                next_id(),
-                Arc::new(TableFunctionTemplate::<HilbertClusteringInfoFunc>::create),
-            ),
-        );
-
         creators.insert(
             "fuse_vacuum_temporary_table".to_string(),
             (

src/query/service/tests/it/storages/fuse/table_functions/clustering_information_table.rs

@@ -34,11 +34,11 @@ async fn test_clustering_information_table_read() -> Result<()> {
         let qry = format!("insert into {}.{} values(1, (2, 3)),(2, (4, 6))", db, tbl);
         let _ = execute_query(ctx.clone(), qry.as_str()).await?;
         let expected = vec![
-            "+----------+----------+----------+----------+----------+----------+---------------+",
-            "| Column 0 | Column 1 | Column 2 | Column 3 | Column 4 | Column 5 | Column 6      |",
-            "+----------+----------+----------+----------+----------+----------+---------------+",
-            "| '(id)'   | 'linear' | 1        | 0        | 0        | 1        | '{\"00001\":1}' |",
-            "+----------+----------+----------+----------+----------+----------+---------------+",
+            "+----------+----------+-----------------------------------------------------------------------------------------------------------------------------------+",
+            "| Column 0 | Column 1 | Column 2                                                                                                                          |",
+            "+----------+----------+-----------------------------------------------------------------------------------------------------------------------------------+",
+            "| '(id)'   | 'linear' | '{\"average_depth\":1.0,\"average_overlaps\":0.0,\"block_depth_histogram\":{\"00001\":1},\"constant_block_count\":0,\"total_block_count\":1}' |",
+            "+----------+----------+-----------------------------------------------------------------------------------------------------------------------------------+",
         ];
 
         let qry = format!(