Function buildCastFunction

src/Analyzer/Utils.cpp:350–370

}

QueryTreeNodePtr buildCastFunction(const QueryTreeNodePtr & expression,
    const DataTypePtr & type,
    const ContextPtr & context,
    bool resolve)
{
    std::string cast_type = type->getName();
    auto cast_type_constant_node = std::make_shared<ConstantNode>(std::move(cast_type), std::make_shared<DataTypeString>());

    std::string cast_function_name = "_CAST";
    auto cast_function_node = std::make_shared<FunctionNode>(cast_function_name);
    cast_function_node->getArguments().getNodes().push_back(expression);
    cast_function_node->getArguments().getNodes().push_back(std::move(cast_type_constant_node));

    if (resolve)
    {
        auto cast_function = FunctionFactory::instance().get(cast_function_name, context);
        cast_function_node->resolveAsFunction(cast_function->build(cast_function_node->getArgumentColumns()));
    }

    return cast_function_node;
}

std::optional<bool> tryExtractConstantFromConditionNode(const QueryTreeNodePtr & condition_node)
{