diff --git a/expression/builtin_time_vec.go b/expression/builtin_time_vec.go
index fa8aba206f..555de11f0c 100644
--- a/expression/builtin_time_vec.go
+++ b/expression/builtin_time_vec.go
@@ -581,11 +581,42 @@ func (b *builtinSubTimeDateTimeNullSig) vecEvalTime(input *chunk.Chunk, result *
 }
 
 func (b *builtinToSecondsSig) vectorized() bool {
-	return false
+	return true
 }
 
+// evalInt evals a builtinToSecondsSig.
+// See https://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_to-seconds
 func (b *builtinToSecondsSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
-	return errors.Errorf("not implemented")
+	n := input.NumRows()
+	buf, err := b.bufAllocator.get(types.ETDatetime, n)
+	if err != nil {
+		return err
+	}
+	defer b.bufAllocator.put(buf)
+	if err := b.args[0].VecEvalTime(b.ctx, input, buf); err != nil {
+		return err
+	}
+
+	result.ResizeInt64(n, false)
+	result.MergeNulls(buf)
+	i64s := result.Int64s()
+	ds := buf.Times()
+	for i := 0; i < n; i++ {
+		if result.IsNull(i) {
+			continue
+		}
+		arg := ds[i]
+		ret := types.TimestampDiff("SECOND", types.ZeroDate, arg)
+		if ret == 0 {
+			if err := handleInvalidTimeError(b.ctx, types.ErrIncorrectDatetimeValue.GenWithStackByArgs(arg.String())); err != nil {
+				return err
+			}
+			result.SetNull(i, true)
+			continue
+		}
+		i64s[i] = ret
+	}
+	return nil
 }
 
 func (b *builtinSubDurationAndStringSig) vectorized() bool {
diff --git a/expression/builtin_time_vec_test.go b/expression/builtin_time_vec_test.go
index 5411169c06..2f8f33a3ad 100644
--- a/expression/builtin_time_vec_test.go
+++ b/expression/builtin_time_vec_test.go
@@ -38,6 +38,9 @@ var vecBuiltinTimeCases = map[string][]vecExprBenchCase{
 	ast.Second: {
 		{retEvalType: types.ETInt, childrenTypes: []types.EvalType{types.ETDuration}, geners: []dataGenerator{&rangeDurationGener{0.2}}},
 	},
+	ast.ToSeconds: {
+		{retEvalType: types.ETInt, childrenTypes: []types.EvalType{types.ETDatetime}},
+	},
 	ast.MicroSecond: {},
 	ast.Now:         {},
 	ast.DayOfWeek: {