Added test #797

dbms/tests/queries/0_stateless/00615_nullable_alter_optimize.sql

@@ -0,0 +1,20 @@
+USE test;
+DROP TABLE IF EXISTS test;
+
+CREATE TABLE test
+(
+    dt Date,
+    id Int32,
+    key String,
+    data Nullable(Int8)
+) ENGINE = MergeTree(dt, (id, key, dt), 8192);
+
+INSERT INTO test (dt,id, key,data) VALUES (now(), 100, 'key', 100500);
+
+alter table test drop column data;
+alter table test add column data Nullable(Float64);
+
+INSERT INTO test (dt,id, key,data) VALUES (now(), 100, 'key', 100500);
+
+OPTIMIZE TABLE test;
+DROP TABLE test;