Read the following chapters from The Pragmatic Programmer, anniversary edition (in our library): Chapter 1, Topic 3: Software Entropy...
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When you repeat a subpattern with a *, + or {...} operator, you may choose between greedy, lazy and possessive modes. Switching modes...
postgresql.org
TL;DR PostgreSQL handles Rails 4+ text and string columns the same. Some libraries may still reflect on the column...