showing that case 2 is fixed

Signed-off-by: Bugen Zhao <[email protected]>

e2e_test/source_inline/kafka/avro/alter_table.slt

@@ -45,7 +45,28 @@ select * from t
 system ok
 sr_register avro_alter_table_test-value AVRO <<< '{"type":"record","name":"Root","fields":[{"name":"bar","type":"int","default":0},{"name":"foo","type":"string"},{"name":"nested","type":["null",{"type":"record","name":"Nested","fields":[{"name":"baz","type":"int"}]}],"default":null}]}'
 
-# Refresh table schema should succeed
+# Before refreshing schema, we create a `SINK INTO TABLE` which involves table replacement,
+# showing that this will NOT accidentally refresh the schema.
+statement ok
+CREATE SINK sk INTO t AS SELECT 8 AS bar, 'XYZ' AS foo WITH (type = 'append-only');
+
+# Demonstrate purified definition
+# Should not include the new field `nested`
+query T
+SELECT SUBSTRING(definition, 1, POSITION(' WITH' IN definition) - 1) FROM rw_tables WHERE name = 't';
+----
+CREATE TABLE t (bar INT, foo CHARACTER VARYING, gen_col INT AS bar + 1)
+
+query ? rowsort
+select * from t
+----
+1 ABC 2
+8 XYZ 9
+
+statement ok
+DROP SINK sk;
+
+# Now, refresh table schema. Should reflect the new schema.
 statement ok
 ALTER TABLE t REFRESH SCHEMA;
 
@@ -55,10 +76,11 @@ SELECT SUBSTRING(definition, 1, POSITION(' WITH' IN definition) - 1) FROM rw_tab
 ----
 CREATE TABLE t (bar INT, foo CHARACTER VARYING, nested STRUCT<baz INT>, gen_col INT AS bar + 1)
 
-query ?
+query ? rowsort
 select * from t
 ----
 1 ABC NULL 2
+8 XYZ NULL 9
 
 # Produce a new message with the new schema
 system ok
@@ -71,6 +93,7 @@ select * from t
 ----
 1 ABC NULL 2
 2 DEF (2)  3
+8 XYZ NULL 9
 
 # create a new version of schema that added a new field to "nested"
 system ok
@@ -106,6 +129,7 @@ Caused by these errors (recent errors listed first):
 
 
 # Can't drop non-generated column
+# TODO(purify): may support it.
 statement error
 ALTER TABLE t DROP COLUMN foo;
 ----
@@ -129,6 +153,7 @@ select * from t
 ----
 ABC
 DEF
+XYZ
 
 statement ok
 drop table t;