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https://github.com/ClickHouse/ClickHouse.git
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81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
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#include <Interpreters/AggregateDescription.h>
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#include <Common/FieldVisitors.h>
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namespace DB
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{
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Strings AggregateDescription::explain() const
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{
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Strings res;
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String arguments_pos_str;
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for (auto arg : arguments)
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{
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if (!arguments_pos_str.empty())
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arguments_pos_str += ", ";
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arguments_pos_str += std::to_string(arg);
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}
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if (arguments_pos_str.empty())
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arguments_pos_str = "none";
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res.emplace_back("argument positions: " + arguments_pos_str);
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String arguments_names_str;
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for (const auto & arg : argument_names)
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{
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if (!arguments_names_str.empty())
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arguments_names_str += ", ";
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arguments_names_str += arg;
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}
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if (arguments_names_str.empty())
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arguments_names_str = "none";
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res.emplace_back("arguments: " + arguments_names_str);
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res.emplace_back("column_name: " + column_name);
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auto get_params_string = [](const Array & arr)
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{
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String params_str;
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for (const auto & param : arr)
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{
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if (!params_str.empty())
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params_str += ", ";
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params_str += applyVisitor(FieldVisitorToString(), param);
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}
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return params_str;
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};
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if (function)
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{
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String types_str;
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for (const auto & type : function->getArgumentTypes())
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{
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if (!types_str.empty())
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types_str += ", ";
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types_str += type->getName();
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}
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auto params_str = get_params_string(function->getParameters());
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if (!params_str.empty())
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params_str = "(" + params_str + ")";
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res.emplace_back("function: " + function->getName() + params_str + '(' + types_str + ") -> " +
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function->getReturnType()->getName());
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}
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else
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res.emplace_back("function: nullptr");
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if (!parameters.empty())
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res.emplace_back("parameters: " + get_params_string(parameters));
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return res;
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}
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}
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