Function queryHasWithClause

programs/client/Client.cpp:158–182

static bool queryHasWithClause(const IAST * ast)
{
    if (const auto * select = dynamic_cast<const ASTSelectQuery *>(ast); select && select->with())
    {
        return true;
    }

    // This full recursive walk is somewhat excessive, because most of the
    // children are not queries, but on the other hand it will let us to avoid
    // breakage when the AST structure changes and some new variant of query
    // nesting is added. This function is used in fuzzer, so it's better to be
    // defensive and avoid weird unexpected errors.
    // clang-tidy is confused by this function: it thinks that if `select` is
    // nullptr, `ast` is also nullptr, and complains about nullptr dereference.
    // NOLINTNEXTLINE
    for (const auto & child : ast->children)
    {
        if (queryHasWithClause(child.get()))
        {
            return true;
        }
    }

    return false;
}


class Client : public Poco::Util::Application