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  5. Christophe Pettus: All Your GUCs in a Row: enable_mergejoin
Christophe Pettus: All Your GUCs in a Row: enable_mergejoin
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Christophe Pettus: All Your GUCs in a Row: enable_mergejoin

Merge join shines when data is already sorted by an index, but stumbles when it has to pay for a sort first.

DevelopmentPlanet PostgreSQLPublished: July 2, 2026
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DevelopmentStack Overflow BlogJul 2, 2026Content in its original language: Portuguese

How do you turn AI coding chaos into a repeatable playbook?​​​​‌ ‍ ​‍​‍‌‍ ‌ ​‍‌‍‍‌‌‍‌ ‌‍‍‌‌‍ ‍​‍​‍​ ‍‍​‍​‍‌ ​ ‌‍​‌‌‍ ‍‌‍‍‌‌ ‌​‌ ‍‌​‍ ‍‌‍‍‌‌‍ ​‍​‍​‍ ​​‍​‍‌‍‍​‌ ​‍‌‍‌‌‌‍‌‍​‍​‍​ ‍‍​‍​‍‌‍‍​‌ ‌​‌ ‌​‌ ​​‌ ​ ​ ‍‍​‍ ​‍ ‌‍​ ‌‍ ‌‌ ​ ​‍ ‍‌ ​ ‌ ‌​‌‍​‌‌‍​ ‌‍‍ ‌‍ ‌ ‌‍‌‍‌‌‌ ​‍‌‍‌‍‌‍ ​‌‍ ‌ ‌ ​‍ ‍‌‍​ ‌‍ ​‍ ‌‍‍‌‌‍ ‍‌ ‌​‌‍‌‌‌‍ ‍‌ ‌​​‍ ‌‍‌‌‌‍‌​‌‍‍‌‌ ‌​​‍ ‌‍ ‌‌‍ ‌‍‌​‌‍‌‌​ ‌‌ ​​‌ ​‍‌‍‌‌‌ ​ ‌‍‌‌‌‍ ‍‌ ‌​‌‍​‌‌ ‌​‌‍‍‌‌‍ ‌‍ ‍​ ‍ ‌‍‍‌‌‍‌​​ ‌​ ‌‌‌‍​ ​ ‌ ‌‍‌‍​ ​​​ ‍​​ ‍​​ ​‍​‍ ‌‌‍‌‌​ ​‌‌‍​‌​ ‌ ​‍ ‌​ ‌​‌‍‌​​ ​​‌‍‌‌​‍ ‌​ ‍‌‌‍‌‌​ ​​​ ‌‍​‍ ‌​ ‍​​ ‌‍‌‍​ ‌‍​ ‌‍‌‌​ ‍‌‌‍​ ​ ​ ​ ‌‍​ ​‌​ ​ ‌‍​‌​ ‍ ‌ ‌​‌ ‍‌‌ ​​‌‍‌‌​ ‌‌‍​‍‌‍ ​‌‍ ‌‍‌ ‌‌​​‌‍ ‌ ​ ‌ ‌​​ ‍ ‌ ​​‌‍​‌‌ ‌​‌‍‍​​ ‌‌ ‌​‌‍‍‌‌ ‌​‌‍ ​‌‍‌‌​ ‌‍​‍‌‍​‌‌ ​ ‌‍‌‌‌‌‌‌‌ ​‍‌‍ ​​ ‌‌‍‍​‌ ‌​‌ ‌​‌ ​​‌ ​ ​‍‌‌​ ​ ‌​​‌​‍‌‌​ ​‍‌​‌‍​‍‌‌​ ​‍‌​‌‍‌‍​ ‌‍ ‌‌ ​ ​‍ ‍‌ ​ ‌ ‌​‌‍​‌‌‍​ ‌‍‍ ‌‍ ‌ ‌‍‌‍‌‌‌ ​‍‌‍‌‍‌‍ ​‌‍ ‌ ‌ ​‍ ‍‌‍​ ‌‍ ​‍‌‍‌‍‍‌‌‍‌​​ ‌​ ‌‌‌‍​ ​ ‌ ‌‍‌‍​ ​​​ ‍​​ ‍​​ ​‍​‍ ‌‌‍‌‌​ ​‌‌‍​‌​ ‌ ​‍ ‌​ ‌​‌‍‌​​ ​​‌‍‌‌​‍ ‌​ ‍‌‌‍‌‌​ ​​​ ‌‍​‍ ‌​ ‍​​ ‌‍‌‍​ ‌‍​ ‌‍‌‌​ ‍‌‌‍​ ​ ​ ​ ‌‍​ ​‌​ ​ ‌‍​‌​‍‌‍‌ ‌​‌ ‍‌‌ ​​‌‍‌‌​ ‌‌‍​‍‌‍ ​‌‍ ‌‍‌ ‌‌​​‌‍ ‌ ​ ‌ ‌​​‍‌‍‌ ​​‌‍​‌‌ ‌​‌‍‍​​ ‌‌ ‌​‌‍‍‌‌ ‌​‌‍ ​‌‍‌‌​‍‌‍‌ ​​‌‍‌‌‌ ​‍‌ ​ ‌ ​​‌‍‌‌‌‍​ ‌ ‌​‌‍‍‌‌ ‌‍‌‍‌‌​ ‌‌ ​​‌ ‌‌‌‍​‍‌‍ ​‌‍‍‌‌ ​ ‌‍‍​‌‍‌‌‌‍‌​​‍​‍‌ ‌

Vivek Raghunathan, SVP of engineering at Snowflake, joins Leaders of Code at Snowflake Summit to break down the five-stage framework his org used to go from "let chaos reign" to a repeatable, org-wide system for AI-assisted…

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DevelopmentEngineering at MetaJul 1, 2026

Meta’s AI Storage Blueprint at Scale

Over the past several years, model capabilities and training dataset sizes have experienced exponential growth. During the past year or so, the time between new-frontier-model releases has gone down from months to weeks. Reliable and fast…

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DevelopmentGitHub BlogJul 1, 2026

6 security settings every GitHub maintainer should enable this week

These six free settings will not make your project unhackable. Nothing will. What they will do is close the easy doors. Turn these on, and your project will be meaningfully harder to attack than it was before. The post 6 security settings…

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