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Data · Thursday, 25 June 2026 · Issue 26 · 9 stories

BC's permanent DST shift will break Postgres timestamps

Data Engineering

Build a production‑grade data pipeline for under €35 a month

The repo ships a production‑shaped pipeline that stitches together DuckDB, Dagster, dlt and dbt on a single €35‑per‑month VM. It pulls open‑source Danish Parliament and Rfam data into a medallion architecture and surfaces insights via Metabase, showing you can run serious data engineering without cloud lock‑in or big spend.

github.com ↗10 min read at source

ML & AI for Data

Reasoning Chains Boost Fact Recall in LLMs, Revealing Hidden Knowledge

Google researchers show that letting LLMs generate a brief reasoning trace lets them pull correct answers that are otherwise invisible in the model’s top‑1 output. Two mechanisms, latent computation buffering and factual priming, explain the effect, suggesting that simple chain‑of‑thought prompting can substantially improve closed‑book QA without extra training.

research.google ↗6 min read at source

Talos automates rare disease reanalysis, limiting review to 1.3 variants per patient

Talos re‑examines stored genomic data as knowledge evolves, recovering 90 % of diagnosable cases while surfacing only 1.3 candidate variants per patient. In a cohort of ~5,000 undiagnosed patients it added 241 new diagnoses, 5 % extra yield, with analysts reviewing just one new variant per 200 patients. This makes systematic, frequent reanalysis sustainable at scale.

microsoft.com ↗7 min read at source

Databases & Storage

BC’s permanent DST shift will break Postgres timestamps

On March 8 2026 BC will stay on Pacific Daylight Time year‑round, making America/Vancouver permanently UTC‑7. Because Postgres timestamptz stores UTC and applies the current tz rules on query, appointments saved before the change will appear an hour off later. Store the intended local time and its zone, or update tzdata, to avoid the bug.

crunchydata.com ↗6 min read at source

MySQL Time‑Travel Recovery via Continuous Binlog Indexing

dbtrail streams MySQL binlogs to keep a searchable index of every row change with before‑and‑after images. It lets teams run time‑travel queries, generate precise reversal SQL, and recover lost cascade deletions without locking or schema changes, all from a web console or AI‑driven MCP client.

github.com ↗1 min read at source

A New Taxonomy Maps Modern Data Systems From OLTP to LTAP

Jack Van Lightly introduces a compact taxonomy that classifies modern storage architectures by system count, workload mix, data visibility, and durable copies. It neatly positions emerging LTAP designs alongside OLTP, OLAP, and HTAP, giving engineers a shared vocabulary to compare single‑tier, tiered, hybrid, and materializing patterns.

jack-vanlightly.com ↗6 min read at source

Practice & Datasets

You’re caught up.

That was all 9 stories in the 25 June issue.