50 years using computers, 40 years freelancing, 35 years dealing with Oracle design and performance issues; mostly retired. Now tweeting at https://xitter.cf/t.co/jgM903GCKq
London, UK
Joined July 2013
- Tweets14.9K
- Following38
- Followers9.6K
- Likes1.5K
Jonathan Lewis retweeted
Another view of your launch: youtu.be/cCJh5D0FCZk
Jonathan Lewis retweeted
We are saddened by the passing of Jim Lovell, commander of Apollo 13 and a four-time spaceflight veteran.
Lovell's life and work inspired millions. His courage under pressure helped forge our path to the Moon and beyond—a journey that continues today. go.nasa.gov/41tbrpq
ALT Astronaut Jim Lovell, wearing a white spacesuit with no helmet, stands outside with a tall rocket and launch tower behind his left shoulder. Lovell is pictured from the chest up; he is looking at the camera and smiling. Credit: NASA
Jonathan Lewis retweeted
I think the more practical question (for now) is if a senior dev would end up producing junior level code when using AI agents?
(... having distractions and deadlines, etc...)
Jonathan Lewis retweeted
More than 3 months to #POUG2025 and we have 30 tickets left. Do you really want to miss over 40 tech sessions (no marketing! no sales pitches!) & opportunity to meet #Oracle stars like @connor_mc_d @JLOracle or @KerryOracleGuy ?
Buy now or cry later:
poug.org/edycja/poug-2025/
Jonathan Lewis retweeted
The days of running oradebug without restriction are numbered!
jonathanlewis.wordpress.com/…
Jonathan Lewis retweeted
The old mathematical ones are the best.
Maybe jokes are like mathematics. You either get them or you don't. But if you need a clue for Vishal's joke, this might help:
en.wikipedia.org/wiki/Residu…
Jonathan Lewis retweeted
Calling out delusional developers...
connor-mcdonald.com/2025/04/…
Jonathan Lewis retweeted
If your developers are talking about the database as «the Persistence Layer», you are in trouble 🥸
Jonathan Lewis retweeted
"If you trust in yourself and believe in your dreams and follow your star you'll still get beaten by people who spent their time working hard and learning things and weren't so lazy."
Miss Tick (The Wee Free Men, Terry Pratchett)
Jonathan Lewis retweeted
The database can now directly track all of the SQL statements you ran in a session, and keep a plethora of metadata and execution statistics about them as well!
youtu.be/V5m4OTELby4
Jonathan Lewis retweeted
The issue has been fixed with Patch 36791812: FDA DDLs Are Offline, Leading to Unusable FDA Indexes.
Jonathan Lewis retweeted
Something happened in year 774 that was so powerful we can measure the radioactivity in old tree rings. Best guess is a solar flare, 10 times more powerful than the Carrington Event in 1859 that zapped telegraph wires.
Worth considering the effect of the next one.
Details: en.wikipedia.org/wiki/774%E2…
Jonathan Lewis retweeted
New post: Adding Loop and Row Counters to SQL Plan Execution FlameGraphs
tanelpoder.com/posts/sql-pla…
Jonathan Lewis retweeted
So you think you're getting a standard 1st year student lecture on geometry only to find the lecturer suddenly talking about eavesdropping & 19th century American politics. Call it a 'rounded' education.
@AlainGoriely's lecture on Conics is now available: youtu.be/d2vgvd9VwwY
Jonathan Lewis retweeted
This is very cool - searching for warp drives using gravitational wave detectors. If the Enterprise is out there in the Milky Way we’re not too far away from being able to detect it :-)
Jonathan Lewis retweeted
Btw, I once wrote a little script to find statements where Starts > 1 for the top plan line in v$sql_ plan_ monitor and it allows to easily monitor if a DB has such restarting DML statements...
github.com/tanelpoder/tpt-or…
Jonathan Lewis retweeted
And we're done.
How a tablescan can turn into 3 tablescans behind your back with array processing disappearing into single row processing: jonathanlewis.wordpress.com/…
