Method getMetadata

ThirdParty/libproj/vtklibproj/src/iso19111/factory.cpp:2785–2793

\brief Return a metadata item. * * Value remains valid while this is alive and to the next call to getMetadata */

 * Value remains valid while this is alive and to the next call to getMetadata
 */
const char *DatabaseContext::getMetadata(const char *key) const {
    auto res =
        d->run("SELECT value FROM metadata WHERE key = ?", {std::string(key)});
    if (res.empty()) {
        return nullptr;
    }
    d->lastMetadataValue_ = res.front()[0];
    return d->lastMetadataValue_.c_str();
}

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