How to use the runestone.server.componentdb.engine.execute function in runestone

def addChapterInfoToDB(subChapD, chapTitles, course_id):
    if not engine:
        print("You need to install a DBAPI module - psycopg2 for Postgres")
        return

    chapters = Table('chapters', meta, autoload=True, autoload_with=engine)
    sub_chapters = Table('sub_chapters', meta, autoload=True, autoload_with=engine)

    engine.execute(chapters.delete().where(chapters.c.course_id == course_id))

    for chapter in subChapD:
        print(chapter)
        ins = chapters.insert().values(chapter_name=chapTitles[chapter],
                                       course_id=course_id, chapter_label=chapter)
        res = engine.execute(ins)
        currentRowId = res.inserted_primary_key[0]
        for subchaptername in subChapD[chapter]:
            ins = sub_chapters.insert().values(sub_chapter_name=unCamel(subchaptername),
                                               chapter_id=str(currentRowId),
                                               sub_chapter_label=subchaptername)
            engine.execute(ins)

if "====" in self.content:
                idx = self.content.index("====")
                source = "\n".join(self.content[:idx])
                suffix = "\n".join(self.content[idx + 1 :])
            else:
                source = "\n".join(self.content)
                suffix = "\n"
        else:
            source = "\n"
            suffix = "\n"

        course_name = env.config.html_context["course_id"]
        divid = self.options["divid"]

        if engine:
            engine.execute(
                Source_code.delete()
                .where(Source_code.c.acid == divid)
                .where(Source_code.c.course_id == course_name)
            )
            engine.execute(
                Source_code.insert().values(
                    acid=divid,
                    course_id=course_name,
                    main_code=source,
                    suffix_code=suffix,
                    includes=self.options["include"],
                    available_files=self.options.get("available_files", ""),
                )
            )
        else:
            if (

chapters = Table('chapters', meta, autoload=True, autoload_with=engine)
    sub_chapters = Table('sub_chapters', meta, autoload=True, autoload_with=engine)

    engine.execute(chapters.delete().where(chapters.c.course_id == course_id))

    for chapter in subChapD:
        print(chapter)
        ins = chapters.insert().values(chapter_name=chapTitles[chapter],
                                       course_id=course_id, chapter_label=chapter)
        res = engine.execute(ins)
        currentRowId = res.inserted_primary_key[0]
        for subchaptername in subChapD[chapter]:
            ins = sub_chapters.insert().values(sub_chapter_name=unCamel(subchaptername),
                                               chapter_id=str(currentRowId),
                                               sub_chapter_label=subchaptername)
            engine.execute(ins)

def addChapterInfoToDB(subChapD, chapTitles, course_id):
    if not engine:
        print("You need to install a DBAPI module - psycopg2 for Postgres")
        return

    chapters = Table('chapters', meta, autoload=True, autoload_with=engine)
    sub_chapters = Table('sub_chapters', meta, autoload=True, autoload_with=engine)

    engine.execute(chapters.delete().where(chapters.c.course_id == course_id))

    for chapter in subChapD:
        print(chapter)
        ins = chapters.insert().values(chapter_name=chapTitles[chapter],
                                       course_id=course_id, chapter_label=chapter)
        res = engine.execute(ins)
        currentRowId = res.inserted_primary_key[0]
        for subchaptername in subChapD[chapter]:
            ins = sub_chapters.insert().values(sub_chapter_name=unCamel(subchaptername),
                                               chapter_id=str(currentRowId),
                                               sub_chapter_label=subchaptername)
            engine.execute(ins)