anonymous_namespace{ResultSetIteration.cpp}::GeoLazyFetchHandler Struct Reference

Static Public Member Functions
template<typename... T>
static auto	fetch (const SQLTypeInfo &geo_ti, const ResultSet::GeoReturnType return_type, T &&...vals)

Detailed Description

Definition at line 887 of file ResultSetIteration.cpp.

Member Function Documentation

template<typename... T>

static auto anonymous_namespace{ResultSetIteration.cpp}::GeoLazyFetchHandler::fetch ( const SQLTypeInfo &  geo_ti, const ResultSet::GeoReturnType  return_type, T &&...  vals  )

inlinestatic

Definition at line 889 of file ResultSetIteration.cpp.

References SQLTypeInfo::get_notnull(), SQLTypeInfo::get_type(), Geospatial::is_null_point(), kPOINT, anonymous_namespace{ResultSetIteration.cpp}::lazy_fetch_chunk(), and anonymous_namespace{ResultSetIteration.cpp}::make_vals_vector().

                                        {
    constexpr int num_vals = sizeof...(vals);
    static_assert(
        num_vals % 2 == 0,
        "Must have consistent pointer/size pairs for lazy fetch of geo target values.");
    const auto vals_vector = make_vals_vector(std::make_index_sequence<num_vals / 2>{},
                                              std::make_tuple(vals...));
    std::array<VarlenDatumPtr, num_vals / 2> ad_arr;
    size_t ctr = 0;
    for (const auto& col_pair : vals_vector) {
      ad_arr[ctr] = lazy_fetch_chunk(col_pair.first, col_pair.second);
      // Regular chunk iterator used to fetch this datum sets the right nullness.
      // That includes the fixlen bounds array.
      // However it may incorrectly set it for the POINT coord array datum
      // if 1st byte happened to hold NULL_ARRAY_TINYINT. One should either use
      // the specialized iterator for POINT coords or rely on regular iterator +
      // reset + recheck, which is what is done below.
      auto is_point = (geo_ti.get_type() == kPOINT && ctr == 0);
      if (is_point) {
        // Resetting POINT coords array nullness here
        ad_arr[ctr]->is_null = false;
      }
      if (!geo_ti.get_notnull()) {
        // Recheck and set nullness
        if (ad_arr[ctr]->length == 0 || ad_arr[ctr]->pointer == NULL ||
            (is_point &&
             is_null_point(geo_ti, ad_arr[ctr]->pointer, ad_arr[ctr]->length))) {
          ad_arr[ctr]->is_null = true;
        }
      }
      ctr++;
    }
    return ad_arr;
  }

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The documentation for this struct was generated from the following file:

• /home/jenkins-slave/workspace/core-os-doxygen/QueryEngine/ResultSetIteration.cpp