Implement TimeToSec function push down

dbms/src/Common/MyDuration.cpp

@@ -67,4 +67,10 @@ String MyDuration::toString() const
     auto frac_str = fmt::format("{:06}", microsecond);
     return fmt::format(fmt_str, sign > 0 ? "" : "-", hour, minute, second, frac_str);
 }
-} // namespace DB
+
+UInt64 calcSeconds(Int32 hour, Int32 minute, Int32 second)
+{
+    return hour * 3600 + minute * 60 + second;
+}
+
+} // namespace DB

dbms/src/Common/MyDuration.h

@@ -89,4 +89,8 @@ class MyDuration
 
     String toString() const;
 };
+
+// returns seconds since '00:00:00'
+UInt64 calcSeconds(Int32 hour, Int32 minute, Int32 second);
+
 } // namespace DB

dbms/src/Flash/Coprocessor/DAGUtils.cpp

@@ -561,7 +561,7 @@ const std::unordered_map<tipb::ScalarFuncSig, String> scalar_func_map({
     {tipb::ScalarFuncSig::Quarter, "toQuarter"},
 
     //{tipb::ScalarFuncSig::SecToTime, "cast"},
-    //{tipb::ScalarFuncSig::TimeToSec, "cast"},
+    {tipb::ScalarFuncSig::TimeToSec, "tidbTimeToSec"},
     //{tipb::ScalarFuncSig::TimestampAdd, "cast"},
     {tipb::ScalarFuncSig::ToDays, "tidbToDays"},
     {tipb::ScalarFuncSig::ToSeconds, "tidbToSeconds"},

dbms/src/Functions/FunctionsDuration.cpp

@@ -97,6 +97,57 @@ void FunctionDurationSplit<Impl>::executeImpl(Block & block, const ColumnNumbers
             ErrorCodes::ILLEGAL_COLUMN);
 };
 
+template <typename Impl>
+DataTypePtr FunctionMyDurationToSec<Impl>::getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const
+{
+    if (!arguments[0].type->isMyTime())
+    {
+        throw Exception(
+            fmt::format("Illegal type {} of the first argument of function {}", arguments[0].type->getName(), getName()),
+            ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
+    }
+    return std::make_shared<DataTypeInt64>();
+}
+
+template <typename Impl>
+void FunctionMyDurationToSec<Impl>::executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) const
+{
+    const auto * from_type = checkAndGetDataType<DataTypeMyDuration>(block.getByPosition(arguments[0]).type.get());
+    if (from_type == nullptr)
+    {
+        throw Exception(
+            fmt::format(
+                "Illegal column {} of the first argument of function {}",
+                block.getByPosition(arguments[0]).column->getName(),
+                name),
+            ErrorCodes::ILLEGAL_COLUMN);
+    }
+
+    using FromFieldType = typename DataTypeMyDuration::FieldType;
+    const auto * col_from = checkAndGetColumn<ColumnVector<FromFieldType>>(block.getByPosition(arguments[0]).column.get());
+    if (col_from != nullptr)
+    {
+        const typename ColumnVector<FromFieldType>::Container & vec_from = col_from->getData();
+        const size_t size = vec_from.size();
+        auto col_to = ColumnVector<Int64>::create(size);
+        typename ColumnVector<Int64>::Container & vec_to = col_to->getData();
+
+        for (size_t i = 0; i < size; ++i)
+        {
+            MyDuration val(vec_from[i], from_type->getFsp());
+            vec_to[i] = Impl::apply(val);
+        }
+        block.getByPosition(result).column = std::move(col_to);
+    }
+    else
+        throw Exception(
+            fmt::format(
+                "Illegal column {} of the first argument of function {}",
+                block.getByPosition(arguments[0]).column->getName(),
+                name),
+            ErrorCodes::ILLEGAL_COLUMN);
+}
+
 struct DurationSplitHourImpl
 {
     static constexpr auto name = "hour";
@@ -133,11 +184,27 @@ struct DurationSplitMicroSecondImpl
     }
 };
 
+struct TiDBTimeToSecTransformerImpl
+{
+    static constexpr auto name = "tidbTimeToSec";
+    static Int64 apply(const MyDuration & val)
+    {
+        Int64 sign = 1;
+        if (val.isNeg())
+        {
+            sign = -1;
+        }
+        return sign * calcSeconds(val.hours(), val.minutes(), val.seconds());
+    }
+};
+
 using FunctionDurationHour = FunctionDurationSplit<DurationSplitHourImpl>;
 using FunctionDurationMinute = FunctionDurationSplit<DurationSplitMinuteImpl>;
 using FunctionDurationSecond = FunctionDurationSplit<DurationSplitSecondImpl>;
 using FunctionDurationMicroSecond = FunctionDurationSplit<DurationSplitMicroSecondImpl>;
 
+using FunctionToTiDBTimeToSec = FunctionMyDurationToSec<TiDBTimeToSecTransformerImpl>;
+
 void registerFunctionsDuration(FunctionFactory & factory)
 {
     factory.registerFunction<FunctionConvertDurationFromNanos>();
@@ -146,5 +213,7 @@ void registerFunctionsDuration(FunctionFactory & factory)
     factory.registerFunction<FunctionDurationMinute>();
     factory.registerFunction<FunctionDurationSecond>();
     factory.registerFunction<FunctionDurationMicroSecond>();
+
+    factory.registerFunction<FunctionToTiDBTimeToSec>();
 }
 } // namespace DB

dbms/src/Functions/FunctionsDuration.h

@@ -69,4 +69,23 @@ class FunctionDurationSplit : public IFunction
     void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) const override;
 };
 
+template <typename Impl>
+class FunctionMyDurationToSec : public IFunction
+{
+public:
+    static constexpr auto name = Impl::name;
+
+    static FunctionPtr create(const Context &) { return std::make_shared<FunctionMyDurationToSec>(); };
+
+    String getName() const override { return name; }
+
+    size_t getNumberOfArguments() const override { return 1; }
+
+    bool useDefaultImplementationForConstants() const override { return true; }
+
+    DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override;
+
+    void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result) const override;
+};
+
 } // namespace DB

dbms/src/Functions/tests/gtest_duration_pushdown.cpp

@@ -166,5 +166,85 @@ try
     ASSERT_COLUMN_EQ(microSecond_out, executeFunction("microSecond", input4));
 }
 CATCH
+
+TEST_F(DurationPushDown, timeToSecPushDownTest)
+try
+{
+    ColumnWithTypeAndName input(
+        createColumn<Nullable<DataTypeMyDuration::FieldType>>({(838 * 3600 + 59 * 60 + 59) * 1000000000L + 999999000L,
+                                                               -(838 * 3600 + 59 * 60 + 59) * 1000000000L - 123456000L,
+                                                               0,
+                                                               (1 * 3600 + 2 * 60 + 3) * 1000000000L + 4000L})
+            .column,
+        makeNullable(std::make_shared<DataTypeMyDuration>(6)),
+        "input");
+    auto second_output = createColumn<Nullable<Int64>>({3020399, -3020399, 0, 3723});
+    ASSERT_COLUMN_EQ(second_output, executeFunction("tidbTimeToSec", input));
+
+    // Test Overflow
+    ColumnWithTypeAndName input2(
+        createColumn<Nullable<DataTypeMyDuration::FieldType>>({(838 * 3600 + 59 * 60 + 59) * 1000000000L + 999999000L + 1000L}).column,
+        makeNullable(std::make_shared<DataTypeMyDuration>(6)),
+        "result");
+    try
+    {
+        auto result = executeFunction("tidbTimeToSec", input2);
+        FAIL() << "Expected overflow";
+    }
+    catch (DB::Exception & e)
+    {
+        ASSERT_EQ(e.message(), std::string("nanos must >= -3020399999999000 and <= 3020399999999000"));
+    }
+    catch (...)
+    {
+        FAIL() << "Expected overflow";
+    };
+
+    ColumnWithTypeAndName input3(
+        createColumn<Nullable<DataTypeMyDuration::FieldType>>({-(838 * 3600 + 59 * 60 + 59) * 1000000000L - 999999000L - 1000L}).column,
+        makeNullable(std::make_shared<DataTypeMyDuration>(6)),
+        "result");
+    try
+    {
+        auto result = executeFunction("tidbTimeToSec", input3);
+        FAIL() << "Expected overflow";
+    }
+    catch (DB::Exception & e)
+    {
+        ASSERT_EQ(e.message(), std::string("nanos must >= -3020399999999000 and <= 3020399999999000"));
+    }
+    catch (...)
+    {
+        FAIL() << "Expected overflow";
+    };
+
+    // Random Test
+    constexpr int rowNum = 1000;
+    auto dur_column = ColumnVector<Int64>::create();
+    auto & dur_data = dur_column->getData();
+    auto second_column = ColumnVector<Int64>::create();
+    auto & second_data = second_column->getData();
+    dur_data.resize(rowNum);
+    second_data.resize(rowNum);
+
+    std::random_device rd;
+    std::default_random_engine gen = std::default_random_engine(rd());
+    std::uniform_int_distribution<int> sign_dis(0, 1), hour_dis(0, 838), minute_dis(0, 59), second_dis(0, 59), microSecond_dis(0, 999999);
+    for (int i = 0; i < rowNum; ++i)
+    {
+        auto sign = (sign_dis(gen) == 0) ? 1 : -1;
+        auto hour = hour_dis(gen);
+        auto minute = minute_dis(gen);
+        auto second = second_dis(gen);
+        auto microSecond = microSecond_dis(gen);
+        dur_data[i] = sign * ((hour * 3600 + minute * 60 + second) * 1000000000L + microSecond * 1000L);
+        second_data[i] = sign * (hour * 3600 + minute * 60 + second);
+    }
+
+    ColumnWithTypeAndName input4(std::move(dur_column), std::make_shared<DataTypeMyDuration>(6), "duration");
+    ColumnWithTypeAndName second_out(std::move(second_column), std::make_shared<DataTypeInt64>(), "time_to_sec");
+    ASSERT_COLUMN_EQ(second_out, executeFunction("tidbTimeToSec", input4));
+}
+CATCH
 } // namespace tests
 } // namespace DB

tests/fullstack-test/expr/duration_pushdown.test

@@ -106,6 +106,14 @@ mysql> use test; set tidb_enforce_mpp=1; set tidb_isolation_read_engines='tiflas
 # |         123500 |
 # +----------------+
 
+mysql> use test; set tidb_enforce_mpp=1; set tidb_isolation_read_engines='tiflash'; select time_to_sec(a) from t;
++----------------+
+| time_to_sec(a) |
++----------------+
+|        2520610 |
+|       -2520610 |
++----------------+
+
 
 mysql> drop table if exists test.time_test;
 mysql> create table test.time_test(id int(11),v1 time(3) not null, v2 time(3));