python · serhiy-storchaka · May 9, 2025 · May 9, 2025
@@ -48,17 +48,25 @@ def runsource(self, source, filename="<input>", symbol="single"):
        Return True if more input is needed; buffering is done automatically.
        Return False if input is a complete statement ready for execution.
        """
-        match source:
-            case ".version":
-                print(f"{sqlite3.sqlite_version}")
-            case ".help":
-                print("Enter SQL code and press enter.")
-            case ".quit":
-                sys.exit(0)
-            case _:
-                if not sqlite3.complete_statement(source):
-                    return True
-                execute(self._cur, source)
+        if not source or source.isspace():
+            return False
+        if source[0] == ".":
+            match source[1:].strip():
+                case "version":
+                    print(f"{sqlite3.sqlite_version}")
+                case "help":
+                    print("Enter SQL code and press enter.")
+                case "quit":
+                    sys.exit(0)
+                case "":
+                    pass
+                case _ as unknown:
+                    self.write("Error: unknown command or invalid arguments:"
+                               f'  "{unknown}".\n')
+        else:
+            if not sqlite3.complete_statement(source):
+                return True
+            execute(self._cur, source)
        return False



@@ -116,6 +116,38 @@ def test_interact_version(self):
        self.assertEqual(out.count(self.PS2), 0)
        self.assertIn(sqlite3.sqlite_version, out)

+    def test_interact_empty_source(self):
+        out, err = self.run_cli(commands=("", " "))
+        self.assertIn(self.MEMORY_DB_MSG, err)
+        self.assertEndsWith(out, self.PS1)
+        self.assertEqual(out.count(self.PS1), 3)
+        self.assertEqual(out.count(self.PS2), 0)
+
+    def test_interact_dot_commands_unknown(self):
+        out, err = self.run_cli(commands=(".unknown_command", ))
+        self.assertIn(self.MEMORY_DB_MSG, err)
+        self.assertEndsWith(out, self.PS1)
+        self.assertEqual(out.count(self.PS1), 2)
+        self.assertEqual(out.count(self.PS2), 0)
+        self.assertIn("Error", err)
+        # test "unknown_command" is pointed out in the error message
+        self.assertIn("unknown_command", err)
+
+    def test_interact_dot_commands_empty(self):
+        out, err = self.run_cli(commands=("."))
+        self.assertIn(self.MEMORY_DB_MSG, err)
+        self.assertEndsWith(out, self.PS1)
+        self.assertEqual(out.count(self.PS1), 2)
+        self.assertEqual(out.count(self.PS2), 0)
+
+    def test_interact_dot_commands_with_whitespaces(self):
+        out, err = self.run_cli(commands=(".version ", ". version"))
+        self.assertIn(self.MEMORY_DB_MSG, err)
+        self.assertEqual(out.count(sqlite3.sqlite_version + "\n"), 2)
+        self.assertEndsWith(out, self.PS1)
+        self.assertEqual(out.count(self.PS1), 3)
+        self.assertEqual(out.count(self.PS2), 0)
+
    def test_interact_valid_sql(self):
        out, err = self.run_cli(commands=("SELECT 1;",))
        self.assertIn(self.MEMORY_DB_MSG, err)

diff --git a/Misc/NEWS.d/next/Library/2025-05-05-22-11-24.gh-issue-133439.LpmyFz.rst b/Misc/NEWS.d/next/Library/2025-05-05-22-11-24.gh-issue-133439.LpmyFz.rst
@@ -0,0 +1,2 @@
+Fix dot commands with trailing spaces are mistaken for multi-line SQL
+statements in the sqlite3 command-line interface.
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		Fix dot commands with trailing spaces are mistaken for multi-line SQL
		statements in the sqlite3 command-line interface.