December 31, 2011
This winter is anomalously warm in Europe, there is no snow and no New Year mood. So today we will be drawing a snowflake in PostgreSQL.
#1. A little theory
Core of a snowflake is six large symmetrical ice crystals growing from the common center. Out of these larger crystals other, smaller, crystals grow.
The overall shape of the snowflake is defined by how large do crystals grow and where exactly are they attached to each other.
These things...