holocron 0.2.0

Declarative schema & query compiler — one YAML as the source of truth for SQL schema and a type-checked query catalog.
Documentation 
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# Should fail: the select column omits `from:`, but the view has more than
# one source (a `from` + a `join`), so Holocron can't infer which one.
# Caught by L3 (resolve views) — exit 1.
#
# Fix: add `from: a` or `from: b` to the select item.
#
# Run: cargo run -- samples/error_ambiguous_source.yml

tables:
  - name: a
    columns: { id: { type: uuid } }
    primary_key: { columns: [id] }
  - name: b
    columns: { id: { type: uuid }, label: { type: text } }
    primary_key: { columns: [id] }

views:
  - name: ambig_view
    from: { table: a, as: a }
    join:
      - { table: b, as: b, type: LEFT, on: "b.id = a.id" }
    select:
      - { column: id }            # no `from` — ambiguous