Exclude system tables from SQLite schema dumps

Author: northeastprince

activerecord/lib/active_record/tasks/sqlite_database_tasks.rb

@@ -50,9 +50,9 @@ def structure_dump(filename, extra_flags)
         if ignore_tables.any?
           ignore_tables = connection.data_sources.select { |table| ignore_tables.any? { |pattern| pattern === table } }
           condition = ignore_tables.map { |table| connection.quote(table) }.join(", ")
-          args << "SELECT sql FROM sqlite_master WHERE tbl_name NOT IN (#{condition}) ORDER BY tbl_name, type DESC, name"
+          args << "SELECT sql || ';' FROM sqlite_master WHERE tbl_name NOT IN (#{condition}) ORDER BY tbl_name, type DESC, name"
         else
-          args << ".schema"
+          args << ".schema --nosys"
         end
         run_cmd("sqlite3", args, filename)
       end

activerecord/test/cases/adapters/sqlite3/sqlite_rake_test.rb

@@ -214,7 +214,7 @@ def test_structure_dump_execution_fails
       assert_called_with(
         Kernel,
         :system,
-        ["sqlite3", "--noop", "db_create.sqlite3", ".schema"],
+        ["sqlite3", "--noop", "db_create.sqlite3", ".schema --nosys"],
         returns: nil,
         out: "awesome-file.sql"
       ) do