ClickHouse/src/Functions/buildId.cpp

#if defined(__ELF__) && !defined(__FreeBSD__)

#include <Functions/IFunctionImpl.h>
#include <Functions/FunctionFactory.h>
#include <DataTypes/DataTypeString.h>
#include <Common/SymbolIndex.h>
#include <Core/Field.h>


namespace DB
{

/** buildId() - returns the compiler build id of the running binary.
  */
class FunctionBuildId : public IFunction
{
public:
    static constexpr auto name = "buildId";
    static FunctionPtr create(const Context &)
    {
        return std::make_shared<FunctionBuildId>();
    }

    String getName() const override
    {
        return name;
    }

    size_t getNumberOfArguments() const override
    {
        return 0;
    }

    DataTypePtr getReturnTypeImpl(const DataTypes & /*arguments*/) const override
    {
        return std::make_shared<DataTypeString>();
    }

    void executeImpl(Block & block, const ColumnNumbers &, size_t result, size_t input_rows_count) override
    {
        block.getByPosition(result).column = DataTypeString().createColumnConst(input_rows_count, SymbolIndex::instance().getBuildIDHex());
    }
};


void registerFunctionBuildId(FunctionFactory & factory)
{
    factory.registerFunction<FunctionBuildId>();
}

}

#else

void registerFunctionBuildId(FunctionFactory &) {}

#endif