Method execute

src/core/statement.cpp:284–391

}

bool statement_impl::execute(bool withDataExchange)
{
    try
    {
        initialFetchSize_ = intos_size();

        if (intos_.empty() == false && initialFetchSize_ == 0)
        {
            // this can happen only with into-vectors elements
            // and is not allowed when calling execute
            throw soci_error("Vectors of size 0 are not allowed.");
        }

        fetchSize_ = initialFetchSize_;

        // pre-use should be executed before inspecting the sizes of use
        // elements, as they can be resized in type conversion routines

        pre_use();

        std::size_t const bindSize = uses_size();

        if (bindSize > 1 && fetchSize_ > 1)
        {
            throw soci_error(
                 "Bulk insert/update and bulk select not allowed in same query");
        }

        // looks like a hack and it is - row description should happen
        // *after* the use elements were completely prepared
        // and *before* the into elements are touched, so that the row
        // description process can inject more into elements for
        // implicit data exchange
        if (row_ != nullptr && alreadyDescribed_ == false)
        {
            describe();
        }

        int num = 0;
        if (withDataExchange)
        {
            num = 1;

            pre_fetch();

            if (static_cast<int>(fetchSize_) > num)
            {
                num = static_cast<int>(fetchSize_);
            }
            if (static_cast<int>(bindSize) > num)
            {
                num = static_cast<int>(bindSize);
            }
        }

        pre_exec(num);

        statement_backend::exec_fetch_result res = backEnd_->execute(num);