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GenJoin: Conditional Generative Plan-to-Plan Query Optimizer that Learns from Subplan Hints

Sulimov, Pavel, Lehmann, Claude, Stockinger, Kurt

arXiv.org Artificial Intelligence

Query optimization has become a research area where classical algorithms are being challenged by machine learning algorithms. At the same time, recent trends in learned query optimizers have shown that it is prudent to take advantage of decades of database research and augment classical query optimizers by shrinking the plan search space through different types of hints (e.g. by specifying the join type, scan type or the order of joins) rather than completely replacing the classical query optimizer with machine learning models. It is especially relevant for cases when classical optimizers cannot fully enumerate all logical and physical plans and, as an alternative, need to rely on less robust approaches like genetic algorithms. However, even symbiotically learned query optimizers are hampered by the need for vast amounts of training data, slow plan generation during inference and unstable results across various workload conditions. In this paper, we present GenJoin - a novel learned query optimizer that considers the query optimization problem as a generative task and is capable of learning from a random set of subplan hints to produce query plans that outperform the classical optimizer. GenJoin is the first learned query optimizer that significantly and consistently outperforms PostgreSQL as well as state-of-the-art methods on two well-known real-world benchmarks across a variety of workloads using rigorous machine learning evaluations.


Tesla Autopilot feature was involved in 13 fatal crashes, US regulator says

The Guardian

US auto-safety regulators said on Friday that their investigation into Tesla's Autopilot had identified at least 13 fatal crashes in which the feature had been involved. The investigation also found the electric carmaker's claims did not match up with reality. The National Highway Traffic Safety Administration (NHTSA) disclosed on Friday that during its three-year Autopilot safety investigation, which it launched in August 2021, it identified at least 13 Tesla crashes involving one or more death, and many more involving serious injuries, in which "foreseeable driver misuse of the system played an apparent role". It also found evidence that "Tesla's weak driver engagement system was not appropriate for Autopilot's permissive operating capabilities", which resulted in a "critical safety gap". The NHTSA also raised concerns that Tesla's Autopilot name "may lead drivers to believe that the automation has greater capabilities than it does and invite drivers to overly trust the automation".


Tesla recalls more than 2m vehicles in US over Autopilot system

The Guardian

Tesla is recalling just over 2m vehicles in the United States fitted with its Autopilot advanced driver-assistance system to install new safeguards, after a safety regulator said the system was open to "foreseeable misuse". The National Highway Traffic Safety Administration (NHTSA) has been investigating the electric automaker led by the billionaire Elon Musk for more than two years over whether Tesla vehicles adequately ensure that drivers pay attention when using the driver assistance system. Tesla said in the recall filing that Autopilot's software system controls "may not be sufficient to prevent driver misuse" and could increase the risk of a crash. The acting NHTSA administrator, Ann Carlson, told Reuters in August it was "really important that driver monitoring systems take into account that humans over-trust technology". Tesla's Autopilot is intended to enable cars to steer, accelerate and brake automatically within their lane, while enhanced Autopilot can assist in changing lanes on highways but does not make them autonomous.


Tesla Is Recalling Nearly All Vehicles Sold in US to Fix an Autopilot Fault

WIRED

Tesla is recalling more than two million vehicles, nearly all of the vehicles it has sold in the US to date, to fix a flawed system designed to make sure drivers are paying attention when they use Autopilot. Rather than physically recalling vehicles, documents posted today by the National Highway Traffic Safety Administration (NHTSA) state that Tesla will send out a software update in an attempt to fix the problem. The recall covers nearly all of the vehicles Tesla sold in the US, including the Model X, Model S, Model Y, and Model 3, and impacts those produced between October 5, 2012, and December 7 2023. It comes after a two-year investigation by the NHTSA into a series of crashes that supposedly happened while Autopilot system was in use. Since 2016, the NHTSA has opened more than 40 special crash investigations involving Teslas and where advanced driver assistance such as Autopilot were suspected of being switched on.


Tesla Recalls Nearly All Vehicles Sold in U.S. to Fix System That Monitors Drivers Using Autopilot

TIME - Tech

Tesla is recalling nearly all of the vehicles it sold in the U.S., more than 2 million across its model lineup, to fix a defective system that's supposed to ensure drivers are paying attention when they use Autopilot. Documents posted Wednesday by U.S. safety regulators say the company will send out a software update to fix the problems. The recall comes after a two-year investigation by the National Highway Traffic Safety Administration into a series of crashes that happened while the Autopilot partially automated driving system was in use. The agency says its investigation found Autopilot's method of ensuring that drivers are paying attention can be inadequate and can lead to foreseeable misuse of the system. The recall covers models Y, S, 3 and X produced between Oct. 5, 2012, and Dec. 7 of this year.


Tesla recalls 2 million cars in order to fix Autopilot safety controls

Engadget

Following a two-year investigation by the National Highway Traffic Safety Administration (NHTSA), Tesla will recall over two million vehicles to make fixes to its Autopilot system, according to new NHTSA documents. Fixes will be issued to owners for free via over-the-air (OTA) updates to add features that ensure drivers pay attention while using Tesla's controversial driver assistance system. It affects all current Tesla EVs built since Autopilot launched in 2015, including the Model 3, Model Y, Model S and Model X. "The remedy will incorporate additional controls and alerts to those already existing on affected vehicles to further encourage the driver to adhere to their continuous driving responsibility whenever Autosteer is engaged," the NHTSA stated in a document. It noted that while Autopilot (specifically its Autosteer component) does have several controls to ensure drivers pay attention, they're not always enough. "In certain circumstances when Autosteer is engaged, the prominence and scope of the feature's controls may not be sufficient to prevent driver misuse of the SAE Level 2 advanced driver-assistance feature," the document states. That in turn may lead to "an increased risk of a collision."


What to Expect at Tesla AI Day 2022

#artificialintelligence

Tesla's AI Day, a yearly event for the tech-obsessed eager to see new ways the company is pushing the envelope, is scheduled for Friday, Sept. 30 in Palo Alto. It's expected to be live-streamed on the Tesla website and YouTube channel around 5 p.m. PT and promises lots of Big Musk Energy. AI Day is basically Tesla's version of an Apple event, but rather than product launches, the event will have a forward-looking focus. It's less about new Teslas, and more about emerging technologies the company is exploring. As Musk noted on Twitter, "this event is meant for recruiting AI & robotics engineers, so will be highly technical."


The Tesla Model X Is (Almost) the Perfect Winter Car

#artificialintelligence

Driving out of New York City at 5 p.m. on a Friday is a stressful endeavor any time of year. Add some slushy snow to the mix, and it's mayhem. But driving the Tesla Model X P100D away from the company's newest store in Manhattan's Meatpacking District I was relaxed and comfortable, despite the gridlock. I approached the drive in Tesla's top-specced SUV with some caution. It's been two years since I last drove a Tesla, then a Model S P90D, and that was on a sunny day in early fall.


New Tesla Autopilot Update Increases Speed Limit, Adds Side Collision Warning: Report

International Business Times

Tesla pushed out a new update to its second-generation (HW2) hardware Sunday. According to a report, owners of Tesla HW2 models started receiving the update over the weekend. Electrek cited the company's release notes for the update, "In general, you must be traveling at least 18 mph to engage Autosteer. When a vehicle is detected in front of you, you can engage Autosteer if you are traveling at least 5 mph, or if you're already using cruise control. In this release, Autosteer is available only below 50 mph. Once you've exceeded this speed, Autosteer will no longer be available."


NHTSA Ruling On Tesla's Autopilot Comes As A Major Relief

Forbes - Tech

Tesla Motors (NASDAQ: TSLA) received a major boost to its development of self-driving cars when the United States National Highway Traffic Safety Administration's Department of Investigation closed its review of a fatal accident of a Tesla Model S while it was on autopilot. The investigation concluded that there was no problem with Autosteer, the key part of Tesla's Autopilot, and confirmed Tesla's claims that when used properly the system reduced crash rates by almost 40%. The investigation found that Tesla vehicle crash rates dropped from 1.3 accidents per million miles driven to 0.8 after the introduction of Autosteer. This is important news for the company and gives its efforts towards building a self-driving Tesla car sharing program a major boost. Last year, the company announced the second master plan for the company.