postgresql
Installation
SKILL.md
PostgreSQL
Data Type Defaults
| Need | Use | Avoid |
|---|---|---|
| Primary key | BIGINT GENERATED ALWAYS AS IDENTITY |
SERIAL, BIGSERIAL |
| Timestamps | TIMESTAMPTZ |
TIMESTAMP (loses timezone) |
| Text | TEXT |
VARCHAR(n) unless constraint needed |
| Money | NUMERIC(precision, scale) |
MONEY, FLOAT |
| Boolean | BOOLEAN with NOT NULL DEFAULT |
nullable booleans |
| JSON | JSONB |
JSON (no indexing), text JSON |
| UUID | gen_random_uuid() (PG13+) |
uuid-ossp extension |
| IP addresses | INET / CIDR |
text |
| Ranges | TSTZRANGE, INT4RANGE, etc. |
pair of columns |