should be it

external/duckdb/test/sql/storage/alter/alter_column_constraint.test

@@ -0,0 +1,85 @@
+# name: test/sql/storage/alter/alter_column_constraint.test
+# description: Issue #1785: ALTER TABLE causes constraints lost in database file after exiting
+# group: [alter]
+
+# load the DB from disk
+load __TEST_DIR__/add_column_constraint.db
+
+statement ok
+CREATE TABLE IF NOT EXISTS a(id INT PRIMARY KEY);
+
+statement ok
+INSERT INTO a(id) VALUES (1);
+
+# add column
+statement ok
+ALTER TABLE a ADD COLUMN c REAL;
+
+statement error
+INSERT INTO a(id) VALUES (1);
+----
+
+restart
+
+statement error
+INSERT INTO a(id) VALUES (1);
+----
+
+# add default
+statement ok
+ALTER TABLE a ALTER COLUMN c SET DEFAULT 10;
+
+statement error
+INSERT INTO a(id) VALUES (1);
+----
+
+restart
+
+statement error
+INSERT INTO a(id) VALUES (1);
+----
+
+# rename column
+statement ok
+ALTER TABLE a RENAME c TO d;
+
+statement error
+INSERT INTO a(id) VALUES (1);
+----
+
+restart
+
+statement error
+INSERT INTO a(id) VALUES (1);
+----
+
+# rename table
+statement ok
+ALTER TABLE a RENAME TO b;
+
+statement error
+INSERT INTO b(id) VALUES (1);
+----
+
+restart
+
+statement error
+INSERT INTO b(id) VALUES (1);
+----
+
+# drop column
+statement ok
+ALTER TABLE b DROP d;
+
+statement error
+INSERT INTO b(id) VALUES (1);
+----
+
+restart
+
+statement error
+INSERT INTO b(id) VALUES (1);
+----
+
+statement ok
+INSERT INTO b(id) VALUES (2);