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#include <Columns/ColumnConst.h>
#include <Columns/ColumnString.h>
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypesNumber.h>
#include <Functions/FunctionFactory.h>
#include <Functions/FunctionHelpers.h>
#include <Functions/IFunction.h>
#include <Common/logger_useful.h>
namespace DB
{
namespace ErrorCodes
{
extern const int ILLEGAL_TYPE_OF_ARGUMENT;
}
namespace
{
class FunctionLogTrace : public IFunction
{
public:
static constexpr auto name = "logTrace";
static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionLogTrace>(); }
String getName() const override { return name; }
size_t getNumberOfArguments() const override { return 1; }
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{
if (!isString(arguments[0]))
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Illegal type {} of argument of function {}",
arguments[0]->getName(), getName());
return std::make_shared<DataTypeUInt8>();
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
{
String message;
if (const ColumnConst * col = checkAndGetColumnConst<ColumnString>(arguments[0].column.get()))
message = col->getDataAt(0).data;
else
throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "First argument for function {} must be Constant string",
getName());
static auto * log = &Poco::Logger::get("FunctionLogTrace");
LOG_TRACE(log, fmt::runtime(message));
return DataTypeUInt8().createColumnConst(input_rows_count, 0);
}
};
}
REGISTER_FUNCTION(LogTrace)
{
factory.registerFunction<FunctionLogTrace>();
}
}
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