public static boolean isNowExpression(final ExpressionSegment segment) {
        return segment instanceof ComplexExpressionSegment && "now()".equalsIgnoreCase(segment.getText());
    }
@Test
    void assertIsNowExpression() {
        assertFalse(ExpressionConditionUtils.isNowExpression(new LiteralExpressionSegment(0, 0, new Object())));
        assertFalse(ExpressionConditionUtils.isNowExpression(new CommonExpressionSegment(0, 0, "shardingsphere")));
        assertTrue(ExpressionConditionUtils.isNowExpression(new CommonExpressionSegment(0, 0, "NOW()")));
    }