Pigsty Blog Articles
Efficient Administrative Region Lookup with PostGIS
How to efficiently solve the typical reverse geocoding problem: determining administrative regions based on user coordinates.
How to efficiently solve the typical reverse geocoding problem: determining administrative regions based on user coordinates.
Monitoring Table Size in PostgreSQL
Tables in PostgreSQL correspond to many physical files. This article explains how to calculate the actual size of a table in PostgreSQL.
Tables in PostgreSQL correspond to many physical files. This article explains how to calculate the actual size of a table in PostgreSQL.
Consistency: An Overloaded Term
The term "consistency" is heavily overloaded, representing different concepts in different contexts. For example, the C in ACID and the C in CAP actually refer to different concepts.
The term "consistency" is heavily overloaded, representing different concepts in different contexts. For example, the C in ACID and the C in CAP actually refer to different concepts.
Why Study Database Principles
Those who only know how to code are just programmers; **learn databases well, and you can at least make a living**; but for **excellent** engineers, merely **using** databases is far from enough.
Those who only know how to code are just programmers; **learn databases well, and you can at least make a living**; but for **excellent** engineers, merely **using** databases is far from enough.
PgAdmin Installation and Configuration
PgAdmin is a GUI program for managing PostgreSQL, written in Python, but it's quite dated and requires some additional configuration.
PgAdmin is a GUI program for managing PostgreSQL, written in Python, but it's quite dated and requires some additional configuration.
Incident-Report: Uneven Load Avalanche
Recently there was a perplexing incident where a database had half its data volume and load migrated away, but ended up being overwhelmed due to increased load.
Recently there was a perplexing incident where a database had half its data volume and load migrated away, but ended up being overwhelmed due to increased load.
Bash and psql Tips
Some tips for interacting between PostgreSQL and Bash.
Some tips for interacting between PostgreSQL and Bash.
Implementing Mutual Exclusion Constraints with Exclude
Exclude constraint is a PostgreSQL extension that can implement more advanced and sophisticated database constraints.
Exclude constraint is a PostgreSQL extension that can implement more advanced and sophisticated database constraints.
Function Volatility Classification Levels
PostgreSQL functions have three volatility levels by default. Proper use can significantly improve performance.
PostgreSQL functions have three volatility levels by default. Proper use can significantly improve performance.
Distinct On: Remove Duplicate Data
Use Distinct On extension clause to quickly find records with maximum/minimum values within groups
Use Distinct On extension clause to quickly find records with maximum/minimum values within groups
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