Method getCreateTableQueryImpl

src/Databases/DatabaseDictionary.cpp:111–142

}

ASTPtr DatabaseDictionary::getCreateTableQueryImpl(const String & table_name, ContextPtr, bool throw_on_error) const
{
    String query;
    {
        WriteBufferFromString buffer(query);

        auto load_result = getContext()->getExternalDictionariesLoader().getLoadResult(table_name);
        if (!load_result.config)
        {
            if (throw_on_error)
                throw Exception{"Dictionary " + backQuote(table_name) + " doesn't exist", ErrorCodes::CANNOT_GET_CREATE_DICTIONARY_QUERY};
            return {};
        }

        auto names_and_types = StorageDictionary::getNamesAndTypes(ExternalDictionariesLoader::getDictionaryStructure(*load_result.config));
        buffer << "CREATE TABLE " << backQuoteIfNeed(getDatabaseName()) << '.' << backQuoteIfNeed(table_name) << " (";
        buffer << StorageDictionary::generateNamesAndTypesDescription(names_and_types);
        buffer << ") Engine = Dictionary(" << backQuoteIfNeed(table_name) << ")";
    }

    auto settings = getContext()->getSettingsRef();
    ParserCreateQuery parser(ParserSettings::valueOf(settings));
    const char * pos = query.data();
    std::string error_message;
    auto ast = tryParseQuery(parser, pos, pos + query.size(), error_message,
            /* hilite = */ false, "", /* allow_multi_statements = */ false, 0, settings.max_parser_depth);

    if (!ast && throw_on_error)
        throw Exception(error_message, ErrorCodes::SYNTAX_ERROR);

    return ast;
}

ASTPtr DatabaseDictionary::getCreateDatabaseQuery() const
{