This commit is contained in:
feng lv 2020-10-10 10:48:15 +08:00
parent 8a1a41f77b
commit ec87254abe
7 changed files with 68 additions and 4 deletions

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@ -0,0 +1,63 @@
#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/IFunctionImpl.h>
#include <Functions/castTypeToEither.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(const Context &) { return std::make_shared<FunctionLogTrace>(); }
String getName() const override { return name; }
size_t getNumberOfArguments() const override { return 1; }
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{
if (!isString(arguments[0]))
throw Exception(
"Illegal type " + arguments[0]->getName() + " of argument of function " + getName(),
ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
return std::make_shared<DataTypeUInt8>();
}
void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result, size_t) const override
{
String message;
if (const ColumnConst * col = checkAndGetColumnConst<ColumnString>(block.getByPosition(arguments[0]).column.get()))
message = col->getDataAt(0).data;
else
throw Exception(
"First argument for function " + getName() + " must be Constant string", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
static auto * log = &Poco::Logger::get("logTrace");
LOG_TRACE(log, message);
block.getByPosition(result).column = DataTypeUInt8().createColumnConst(1, 0);
}
};
}
void registerFunctionLogTrace(FunctionFactory & factory)
{
factory.registerFunction<FunctionLogTrace>();
}
}

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@ -41,6 +41,7 @@ void registerFunctionsUnixTimestamp64(FunctionFactory & factory);
void registerFunctionBayesAB(FunctionFactory &);
#endif
void registerFunctionTid(FunctionFactory & factory);
void registerFunctionLogTrace(FunctionFactory & factory);
void registerFunctions()
@ -87,6 +88,7 @@ void registerFunctions()
registerFunctionBayesAB(factory);
#endif
registerFunctionTid(factory);
registerFunctionLogTrace(factory);
}
}

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@ -8,10 +8,6 @@
namespace DB
{
namespace ErrorCodes
{
}
namespace
{
class FunctionTid : public IFunction

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@ -0,0 +1 @@
SELECT tid() FORMAT Null

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@ -0,0 +1 @@
0

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@ -0,0 +1 @@
SELECT logTrace('message')