More detailed test. [#CLICKHOUSE-3]

Resolves #1553.

dbms/src/Storages/StorageMergeTree.cpp

@@ -444,6 +444,7 @@ void StorageMergeTree::clearColumnInPartition(const ASTPtr & partition, const Fi
     for (auto & transaction : transactions)
         transaction->commit();
 
+    /// Recalculate columns size (not only for the modified column)
     data.recalculateColumnSizes();
 }
 

dbms/src/Storages/StorageReplicatedMergeTree.cpp

@@ -1467,6 +1467,7 @@ void StorageReplicatedMergeTree::executeClearColumnInPartition(const LogEntry &
 
     LOG_DEBUG(log, "Cleared column " << entry.column_name << " in " << modified_parts << " parts");
 
+    /// Recalculate columns size (not only for the modified column)
     data.recalculateColumnSizes();
 }
 

dbms/tests/queries/0_stateless/00446_clear_column_in_partition_zookeeper.reference

@@ -1,7 +1,12 @@
+===Ordinary case===
+16
 1	a
 2	b
 0	a
 2	b
+8
+0	0
+===Replicated case===
 all
 2000-01-01	0	
 2000-01-01	1	a

dbms/tests/queries/0_stateless/00446_clear_column_in_partition_zookeeper.sql

@@ -1,15 +1,23 @@
+SELECT '===Ordinary case===';
+
 DROP TABLE IF EXISTS test.clear_column;
 CREATE TABLE test.clear_column (d Date, num Int64, str String) ENGINE = MergeTree(d, d, 8192);
 
 INSERT INTO test.clear_column VALUES ('2016-12-12', 1, 'a'), ('2016-11-12', 2, 'b');
 
+SELECT data_uncompressed_bytes FROM system.columns WHERE (database = 'test') AND (table = 'clear_column') AND (name = 'num');
+
 SELECT num, str FROM test.clear_column ORDER BY num;
 ALTER TABLE test.clear_column CLEAR COLUMN num IN PARTITION '201612';
 SELECT num, str FROM test.clear_column ORDER BY num;
 
+SELECT data_uncompressed_bytes FROM system.columns WHERE (database = 'test') AND (table = 'clear_column') AND (name = 'num');
+ALTER TABLE test.clear_column CLEAR COLUMN num IN PARTITION '201611';
+SELECT data_compressed_bytes, data_uncompressed_bytes FROM system.columns WHERE (database = 'test') AND (table = 'clear_column') AND (name = 'num');
+
 DROP TABLE test.clear_column;
 
--- Replicated case
+SELECT '===Replicated case===';
 
 DROP TABLE IF EXISTS test.clear_column1;
 DROP TABLE IF EXISTS test.clear_column2;