Sqlc

Skill colonyops/hive/.claude/skills/sqlc

Add SQL queries, run code generation, and configure type overrides for the hive SQLite data layer. Use when writing new queries, adding tables, or mapping domain types to generated code.From its SKILL.md

Install

npx -y skills add colonyops/hive --skill sqlc

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SKILL.md

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sqlc in Hive

Hive uses sqlc to generate type-safe Go from SQL queries. The generated files are committed to the repo — never edit them manually.

File Layout

internal/data/db/
├── queries/
│   ├── queries.sql          # Core session/message queries
│   └── queries_hc.sql       # Honeycomb queries (separate file)
├── migrations/
│   └── NNNN_name.up.sql     # Schema migrations (source of truth for sqlc)
├── queries.sql.go           # Generated — do not edit
├── queries_hc.sql.go        # Generated — do not edit
└── models.go                # Generated — do not edit

sqlc.yaml at the repo root lists both query files under sql[0].queries.

Running Code Generation

After any change to .sql query files or sqlc.yaml:

mise run generate    # runs sqlc generate + go-enum generation
# or directly:
sqlc generate

Always commit the generated *.sql.go and models.go alongside the SQL changes.

Adding a Query

Write the annotated query in the appropriate .sql file:

-- name: GetHCItem :one
SELECT id, repo_key, epic_id, parent_id, session_id, title, "desc",
       type, status, depth, created_at, updated_at
FROM hc_items WHERE id = ?;

-- name: ListHCItems :many
SELECT ... FROM hc_items WHERE repo_key = ? ORDER BY created_at DESC;

-- name: InsertHCItem :exec
INSERT INTO hc_items (...) VALUES (...);

Annotations: :one (returns single row), :many (returns slice), :exec (no rows returned).

Run mise run generate.
The generated function appears in queries_hc.sql.go (or queries.sql.go) under the db package.
Call it via s.db.Queries().GetHCItem(ctx, id).

Type Overrides (Domain Types in Generated Code)

When a column stores a domain enum, add an override in sqlc.yaml so the generated params/returns use the Go type directly instead of string:

overrides:
  - column: "hc_items.status"
    go_type:
      import: "github.com/colonyops/hive/internal/core/hc"
      type: "Status"
  - column: "hc_items.type"
    go_type:
      import: "github.com/colonyops/hive/internal/core/hc"
      type: "ItemType"

The domain type must implement driver.Valuer and sql.Scanner (or use text marshaling). go-enum generated types satisfy this via MarshalText/UnmarshalText, which SQLite handles as text.

Schema Source of Truth

sqlc derives the schema from internal/data/db/migrations/*.up.sql. When you add a migration, run mise run generate to regenerate models. The generated models.go is always overwritten — do not add hand-written code there.

Separate Query Files

HC queries live in queries_hc.sql to keep the diff surface small. Add new feature query files by listing them under sql[0].queries in sqlc.yaml. All query files share the same gen.go output directory and package.

Common Patterns

Nullable / optional columns: Use sql.NullString, sql.NullInt64, etc. Override with nullable: true in sqlc.yaml if needed.

Timestamps: Stored as INTEGER NOT NULL (Unix seconds). The generated code uses int64. Conversion to/from time.Time happens in the store layer, not in generated code.

Transactions: Use s.db.WithTx(ctx, func(q *db.Queries) error { ... }) — the db.DB wrapper provides this. Queries inside the closure use the transactional Queries instance.