7 lines
355 B
Markdown
7 lines
355 B
Markdown
# ADR-002: PostgreSQL over MongoDB
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**Status:** Accepted
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**Context:** Mileage data is relational (user → role → event → score). MongoDB adds flexibility but sacrifices query power.
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**Decision:** Use PostgreSQL with JSONB columns for extensible user metadata.
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**Consequences:** Schema migrations needed for new features; joins straightforward.
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