Function wrapIdentifiersWithBackticks

programs/copier/Internals.cpp:193–210

Wraps only identifiers with backticks.

/// Wraps only identifiers with backticks.
std::string wrapIdentifiersWithBackticks(const ASTPtr & root)
{
    if (auto identifier = std::dynamic_pointer_cast<ASTIdentifier>(root))
        return backQuote(identifier->name());

    if (auto function = std::dynamic_pointer_cast<ASTFunction>(root))
        return function->name + '(' + wrapIdentifiersWithBackticks(function->arguments) + ')';

    if (auto expression_list = std::dynamic_pointer_cast<ASTExpressionList>(root))
    {
        Names function_arguments(expression_list->children.size());
        for (size_t i = 0; i < expression_list->children.size(); ++i)
            function_arguments[i] = wrapIdentifiersWithBackticks(expression_list->children[0]);
        return boost::algorithm::join(function_arguments, ", ");
    }

    throw Exception("Primary key could be represented only as columns or functions from columns.", ErrorCodes::BAD_ARGUMENTS);
}


Names extractPrimaryKeyColumnNames(const ASTPtr & storage_ast)