Merge pull request ClickHouse#74161 from ClickHouse/fix_crash_compressed_memory

Fix crash when reading subcolumn from compressed Memory eng table

Author: alexey-milovidov

src/Interpreters/getColumnFromBlock.cpp

@@ -52,7 +52,7 @@ ColumnPtr tryGetSubcolumnFromBlock(const Block & block, const DataTypePtr & requ
         return elem_column;
     }
 
-    auto elem_column = elem->type->tryGetSubcolumn(subcolumn_name, elem->column);
+    auto elem_column = elem->type->tryGetSubcolumn(subcolumn_name, elem->column->decompress());
     auto elem_type = elem->type->tryGetSubcolumnType(subcolumn_name);
 
     if (!elem_type || !elem_column)

tests/queries/0_stateless/03305_compressed_memory_eng_crash_reading_subcolumn.reference

@@ -0,0 +1,8 @@
+DROP TABLE IF EXISTS t0;
+
+CREATE TABLE t0 (c0 Nullable(Int)) ENGINE = Memory() SETTINGS compress = 1;
+INSERT INTO TABLE t0 (c0) VALUES (1);
+
+SELECT t0.c0.null FROM t0 FORMAT Null SETTINGS enable_analyzer = 1;
+
+DROP TABLE t0;