expression: fix unit test for builtinSysDateWithoutFspSig (#13425)

expression/builtin_time_test.go

@@ -1059,6 +1059,17 @@ func (s *testEvaluatorSuite) TestSysDate(c *C) {
 		c.Assert(err, IsNil)
 		n := v.GetMysqlTime()
 		c.Assert(n.String(), GreaterEqual, last.Format(types.TimeFormat))
+
+		baseFunc, _, input, output := genVecBuiltinFuncBenchCase(ctx, ast.Sysdate, vecExprBenchCase{retEvalType: types.ETDatetime})
+		resetStmtContext(s.ctx)
+		err = baseFunc.vecEvalTime(input, output)
+		c.Assert(err, IsNil)
+		last = time.Now()
+		times := output.Times()
+		for i := 0; i < 1024; i++ {
+			c.Assert(times[i].String(), GreaterEqual, last.Format(types.TimeFormat))
+		}
+
 	}
 
 	last := time.Now()

expression/builtin_time_vec.go

@@ -183,12 +183,8 @@ func (b *builtinSysDateWithoutFspSig) vectorized() bool {
 func (b *builtinSysDateWithoutFspSig) vecEvalTime(input *chunk.Chunk, result *chunk.Column) error {
 	n := input.NumRows()
 	loc := b.ctx.GetSessionVars().Location()
-	nowTs, err := getStmtTimestamp(b.ctx)
-	if err != nil {
-		return err
-	}
+	now := time.Now().In(loc)
 
-	now := nowTs.In(loc)
 	result.ResizeTime(n, false)
 	times := result.Times()
 	t, err := convertTimeToMysqlTime(now, 0, types.ModeHalfEven)

expression/builtin_time_vec_test.go

@@ -219,7 +219,10 @@ var vecBuiltinTimeCases = map[string][]vecExprBenchCase{
 		},
 	},
 	ast.Sysdate: {
-		{retEvalType: types.ETDatetime},
+		// Because there is a chance that a time error will cause the test to fail,
+		// we cannot use the vectorized test framework to test builtinSysDateWithoutFspSig.
+		// We test the builtinSysDateWithoutFspSig in TestSysDate function.
+		// {retEvalType: types.ETDatetime},
 	},
 }