Method visit

src/Interpreters/QueryNormalizer.cpp:155–280

}

void QueryNormalizer::visit(ASTFunction & node, ASTPtr & ast, Data & data)
{
    String & func_name = node.name;

    /// Special cases for count function.
    String func_name_lowercase = Poco::toLower(func_name);
    if (endsWith(func_name_lowercase, "vcfunnelopt"))
    {
		// TODO
        // /// reuse funnel_old_rule setting for skipping repeat event in Finder case
        // if (data.settings.funnel_old_rule)
        // {
        //     func_name = func_name + "Skip";
        // }
    }
#if 0 //TODO
    else if (func_name_lowercase == "sumdistinct")
    {
        /// replace sumDistinc with internal implementation uniqSum;
        func_name = "uniqSum";
    }
    else if (func_name_lowercase == "partitionstatus")
    {
        String old_col_name_or_alias = node.getAliasOrColumnName();

        ASTs & args = node.arguments->children;
        if (args.size() != 3)
            throw Exception("Function partitionStatus only accept three arguments.", ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);

        size_t arg_num = 0;
        args[arg_num] = evaluateConstantExpressionOrIdentifierAsLiteral(args[arg_num], data.context);
        String database_name = args[arg_num]->as<ASTLiteral &>().value.safeGet<String>();

        ++arg_num;
        args[arg_num] = evaluateConstantExpressionOrIdentifierAsLiteral(args[arg_num], data.context);
        String table_name = args[arg_num]->as<ASTLiteral &>().value.safeGet<String>();

        ++arg_num;

        auto partition = std::make_shared<ASTPartition>();
        size_t fields_count;
        String fields_str;

        String partition_name = args[arg_num]->getColumnName();

        const auto * tuple_ast = args[arg_num]->as<ASTFunction>();
        if (tuple_ast && tuple_ast->name == "tuple")
        {
            const auto * arguments_ast = tuple_ast->arguments->as<ASTExpressionList>();
            if (arguments_ast)
                fields_count = arguments_ast->children.size();
            else
                fields_count = 0;

            auto left_paren = partition_name.data();
            auto right_paren = partition_name.data() + partition_name.size();

            while (left_paren != right_paren && *left_paren != '(')