2024-05-13 16:26:32 +02:00
13 changed files with 1149 additions and 29 deletions
--- a/cmd/sqlc-export-schema/main.go
+++ b/cmd/sqlc-export-schema/main.go
@ -0,0 +1,189 @@
+package main
+
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+import (
+	"context"
+	"database/sql"
+	"flag"
+	"fmt"
+	"os"
+	"os/signal"
+	"regexp"
+	"strings"
+	"syscall"
+	"time"
+
+	"github.com/mattn/go-colorable"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+	"gopkg.in/yaml.v2"
+
+	_ "modernc.org/sqlite"
+)
+
+var (
+	// Tables and/or indices to skip when writing the schema.
+	// Anything that is *not* to be seen by sqlc should be listed here.
+	skips = map[SQLiteSchema]bool{
+		// Goose manages its own versioning table. SQLC should ignore its existence.
+		{Type: "table", Name: "goose_db_version"}: true,
+	}
+
+	tableNameDequoter = regexp.MustCompile("^(?:CREATE TABLE )(\"([^\"]+)\")")
+)
+
+type SQLiteSchema struct {
+	Type      string
+	Name      string
+	TableName string
+	RootPage  int
+	SQL       sql.NullString
+}
+
+func saveSchema(ctx context.Context, sqlOutPath string) error {
+	db, err := sql.Open("sqlite", "flamenco-manager.sqlite")
+	if err != nil {
+		return err
+	}
+	defer db.Close()
+
+	rows, err := db.QueryContext(ctx, "select * from sqlite_schema order by type desc, name asc")
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+
+	sqlBuilder := strings.Builder{}
+
+	for rows.Next() {
+		var data SQLiteSchema
+		if err := rows.Scan(
+			&data.Type,
+			&data.Name,
+			&data.TableName,
+			&data.RootPage,
+			&data.SQL,
+		); err != nil {
+			return err
+		}
+		if strings.HasPrefix(data.Name, "sqlite_") {
+			continue
+		}
+		if skips[SQLiteSchema{Type: data.Type, Name: data.Name}] {
+			continue
+		}
+		if !data.SQL.Valid {
+			continue
+		}
+
+		sql := tableNameDequoter.ReplaceAllString(data.SQL.String, "CREATE TABLE $2")
+
+		sqlBuilder.WriteString(sql)
+		sqlBuilder.WriteString(";\n")
+	}
+
+	sqlBytes := []byte(sqlBuilder.String())
+	if err := os.WriteFile(sqlOutPath, sqlBytes, os.ModePerm); err != nil {
+		return fmt.Errorf("writing to %s: %w", sqlOutPath, err)
+	}
+
+	log.Info().Str("path", sqlOutPath).Msg("schema written to file")
+	return nil
+}
+
+// SqlcConfig models the minimal subset of the sqlc.yaml we need to parse.
+type SqlcConfig struct {
+	Version string `yaml:"version"`
+	SQL     []struct {
+		Schema string `yaml:"schema"`
+	} `yaml:"sql"`
+}
+
+func main() {
+	output := zerolog.ConsoleWriter{Out: colorable.NewColorableStdout(), TimeFormat: time.RFC3339}
+	log.Logger = log.Output(output)
+	parseCliArgs()
+
+	mainCtx, mainCtxCancel := context.WithCancel(context.Background())
+	defer mainCtxCancel()
+
+	installSignalHandler(mainCtxCancel)
+
+	schemaPath := schemaPathFromSqlcYAML()
+
+	if err := saveSchema(mainCtx, schemaPath); err != nil {
+		log.Fatal().Err(err).Msg("couldn't export schema")
+	}
+}
+
+// installSignalHandler spawns a goroutine that handles incoming POSIX signals.
+func installSignalHandler(cancelFunc context.CancelFunc) {
+	signals := make(chan os.Signal, 1)
+	signal.Notify(signals, os.Interrupt)
+	signal.Notify(signals, syscall.SIGTERM)
+	go func() {
+		for signum := range signals {
+			log.Info().Str("signal", signum.String()).Msg("signal received, shutting down")
+			cancelFunc()
+		}
+	}()
+}
+
+func parseCliArgs() {
+	var quiet, debug, trace bool
+
+	flag.BoolVar(&quiet, "quiet", false, "Only log warning-level and worse.")
+	flag.BoolVar(&debug, "debug", false, "Enable debug-level logging.")
+	flag.BoolVar(&trace, "trace", false, "Enable trace-level logging.")
+
+	flag.Parse()
+
+	var logLevel zerolog.Level
+	switch {
+	case trace:
+		logLevel = zerolog.TraceLevel
+	case debug:
+		logLevel = zerolog.DebugLevel
+	case quiet:
+		logLevel = zerolog.WarnLevel
+	default:
+		logLevel = zerolog.InfoLevel
+	}
+	zerolog.SetGlobalLevel(logLevel)
+}
+
+func schemaPathFromSqlcYAML() string {
+	var sqlcConfig SqlcConfig
+
+	{
+		sqlcConfigBytes, err := os.ReadFile("sqlc.yaml")
+		if err != nil {
+			log.Fatal().Err(err).Msg("cannot read sqlc.yaml")
+		}
+
+		if err := yaml.Unmarshal(sqlcConfigBytes, &sqlcConfig); err != nil {
+			log.Fatal().Err(err).Msg("cannot parse sqlc.yaml")
+		}
+	}
+
+	if sqlcConfig.Version != "2" {
+		log.Fatal().
+			Str("version", sqlcConfig.Version).
+			Str("expected", "2").
+			Msg("unexpected version in sqlc.yaml")
+	}
+
+	if len(sqlcConfig.SQL) != 1 {
+		log.Fatal().
+			Int("sql items", len(sqlcConfig.SQL)).
+			Msg("sqlc.yaml should contain a single item in the 'sql' list")
+	}
+
+	schema := sqlcConfig.SQL[0].Schema
+	if schema == "" {
+		log.Fatal().Msg("sqlc.yaml should have a 'schema' key in the 'sql' item")
+	}
+
+	return schema
+}
--- a/internal/manager/persistence/db.go
+++ b/internal/manager/persistence/db.go
@ -8,11 +8,11 @@ import (
 	"fmt"
 	"time"

+	"github.com/glebarez/sqlite"
 	"github.com/rs/zerolog/log"
 	"gorm.io/gorm"

-	// sqlite "projects.blender.org/studio/flamenco/pkg/gorm-modernc-sqlite"
-	"github.com/glebarez/sqlite"
+	"projects.blender.org/studio/flamenco/internal/manager/persistence/sqlc"
 )

 // DB provides the database interface.
@ -171,6 +171,17 @@ func (db *DB) Close() error {
 	return sqldb.Close()
 }

+// queries returns the SQLC Queries struct, connected to this database.
+// It is intended that all GORM queries will be migrated to use this interface
+// instead.
+func (db *DB) queries() (*sqlc.Queries, error) {
+	sqldb, err := db.gormDB.DB()
+	if err != nil {
+		return nil, fmt.Errorf("could not get low-level database driver: %w", err)
+	}
+	return sqlc.New(sqldb), nil
+}
+
 func (db *DB) pragmaForeignKeys(enabled bool) error {
 	var (
 		value int
--- a/internal/manager/persistence/jobs.go
+++ b/internal/manager/persistence/jobs.go
@ -17,6 +17,7 @@ import (
 	"gorm.io/gorm/clause"

 	"projects.blender.org/studio/flamenco/internal/manager/job_compilers"
+	"projects.blender.org/studio/flamenco/internal/manager/persistence/sqlc"
 	"projects.blender.org/studio/flamenco/pkg/api"
 )

@ -252,19 +253,20 @@ func (db *DB) storeAuthoredJobTaks(

 // FetchJob fetches a single job, without fetching its tasks.
 func (db *DB) FetchJob(ctx context.Context, jobUUID string) (*Job, error) {
-	dbJob := Job{}
-	findResult := db.gormDB.WithContext(ctx).
-		Limit(1).
-		Preload("WorkerTag").
-		Find(&dbJob, "uuid = ?", jobUUID)
-	if findResult.Error != nil {
-		return nil, jobError(findResult.Error, "fetching job")
-	}
-	if dbJob.ID == 0 {
-		return nil, ErrJobNotFound
+	queries, err := db.queries()
+	if err != nil {
+		return nil, err
 	}

-	return &dbJob, nil
+	sqlcJob, err := queries.FetchJob(ctx, jobUUID)
+	switch {
+	case errors.Is(err, sql.ErrNoRows):
+		return nil, ErrJobNotFound
+	case err != nil:
+		return nil, jobError(err, "fetching job")
+	}
+
+	return convertSqlcJob(sqlcJob)
 }

 // DeleteJob deletes a job from the database.
@ -279,24 +281,39 @@ func (db *DB) DeleteJob(ctx context.Context, jobUUID string) error {
 		return ErrDeletingWithoutFK
 	}

-	tx := db.gormDB.WithContext(ctx).
-		Where("uuid = ?", jobUUID).
-		Delete(&Job{})
-	if tx.Error != nil {
-		return jobError(tx.Error, "deleting job")
+	queries, err := db.queries()
+	if err != nil {
+		return err
+	}
+
+	if err := queries.DeleteJob(ctx, jobUUID); err != nil {
+		return jobError(err, "deleting job")
 	}
 	return nil
 }

 // RequestJobDeletion sets the job's "DeletionRequestedAt" field to "now".
 func (db *DB) RequestJobDeletion(ctx context.Context, j *Job) error {
+	queries, err := db.queries()
+	if err != nil {
+		return err
+	}
+
+	// Update the given job itself, so we don't have to re-fetch it from the database.
 	j.DeleteRequestedAt.Time = db.gormDB.NowFunc()
 	j.DeleteRequestedAt.Valid = true
-	tx := db.gormDB.WithContext(ctx).
-		Model(j).
-		Updates(Job{DeleteRequestedAt: j.DeleteRequestedAt})
-	if tx.Error != nil {
-		return jobError(tx.Error, "queueing job for deletion")
+
+	params := sqlc.RequestJobDeletionParams{
+		Now:   j.DeleteRequestedAt,
+		JobID: int64(j.ID),
+	}
+
+	log.Trace().
+		Str("job", j.UUID).
+		Time("deletedAt", params.Now.Time).
+		Msg("database: marking job as deletion-requested")
+	if err := queries.RequestJobDeletion(ctx, params); err != nil {
+		return jobError(err, "queueing job for deletion")
 	}
 	return nil
 }
@ -713,3 +730,42 @@ func (db *DB) FetchTaskFailureList(ctx context.Context, t *Task) ([]*Worker, err

 	return workers, tx.Error
 }
+
+// convertSqlcJob converts a job from the SQLC-generated model to the model
+// expected by the rest of the code. This is mostly in place to aid in the GORM
+// to SQLC migration. It is intended that eventually the rest of the code will
+// use the same SQLC-generated model.
+func convertSqlcJob(job sqlc.Job) (*Job, error) {
+	dbJob := Job{
+		Model: Model{
+			ID:        uint(job.ID),
+			CreatedAt: job.CreatedAt,
+			UpdatedAt: job.UpdatedAt.Time,
+		},
+		UUID:              job.Uuid,
+		Name:              job.Name,
+		JobType:           job.JobType,
+		Priority:          int(job.Priority),
+		Status:            api.JobStatus(job.Status),
+		Activity:          job.Activity,
+		DeleteRequestedAt: job.DeleteRequestedAt,
+		Storage: JobStorageInfo{
+			ShamanCheckoutID: job.StorageShamanCheckoutID,
+		},
+	}
+
+	if err := json.Unmarshal(job.Settings, &dbJob.Settings); err != nil {
+		return nil, jobError(err, fmt.Sprintf("job %s has invalid settings: %v", job.Uuid, err))
+	}
+
+	if err := json.Unmarshal(job.Metadata, &dbJob.Metadata); err != nil {
+		return nil, jobError(err, fmt.Sprintf("job %s has invalid metadata: %v", job.Uuid, err))
+	}
+
+	if job.WorkerTagID.Valid {
+		workerTagID := uint(job.WorkerTagID.Int64)
+		dbJob.WorkerTagID = &workerTagID
+	}
+
+	return &dbJob, nil
+}
--- a/internal/manager/persistence/jobs_test.go
+++ b/internal/manager/persistence/jobs_test.go
@ -288,10 +288,10 @@ func TestFetchJobsDeletionRequested(t *testing.T) {
 	// Ensure different requests get different timestamps,
 	// out of chronological order.
 	timestamps := []time.Time{
-		// timestamps for 'delete requested at' and 'updated at'
-		now.Add(-3 * time.Second), now.Add(-3 * time.Second),
-		now.Add(-1 * time.Second), now.Add(-1 * time.Second),
-		now.Add(-5 * time.Second), now.Add(-5 * time.Second),
+		// timestamps for 'delete requested at'.
+		now.Add(-3 * time.Second),
+		now.Add(-1 * time.Second),
+		now.Add(-5 * time.Second),
 	}
 	currentTimestampIndex := 0
 	db.gormDB.NowFunc = func() time.Time {
--- a/internal/manager/persistence/migrations/0003_drop_worker_clusters.sql
+++ b/internal/manager/persistence/migrations/0003_drop_worker_clusters.sql
@ -0,0 +1,15 @@
+-- Drop tables that were in use in beta versions of Flamenco. These might exist
+-- in developer databases, as well as databases of studios following the `main`
+-- branch, such as Blender Studio.
+--
+-- WARNING: this migration simply drops the tables. Their data is erased, and
+-- cannot be brought back by rolling the migration back.
+--
+-- +goose Up
+DROP INDEX IF EXISTS `idx_worker_clusters_uuid`;
+DROP TABLE IF EXISTS `worker_cluster_membership`;
+DROP TABLE IF EXISTS `worker_clusters`;
+
+-- +goose Down
+-- Do not recreate these tables, as no release of Flamenco ever used them.
+-- Also their contents wouldn't be brought back anyway.
--- a/internal/manager/persistence/migrations/0004_sqlc_compat_and_more_nonnull.sql
+++ b/internal/manager/persistence/migrations/0004_sqlc_compat_and_more_nonnull.sql
@ -0,0 +1,371 @@
+-- GORM automigration wasn't smart, and thus the database had more nullable
+-- columns than necessary. This migration makes columns that should never be
+-- NULL actually NOT NULL.
+--
+-- Since this migration recreates all tables in the database, this is now also
+-- done in a way that makes the schema more compatible with sqlc (which is
+-- mostly removing various quotes and backticks, and replacing char(N) with
+-- varchar(N)). sqlc is the tool that'll replace GORM.
+--
+-- +goose Up
+CREATE TABLE temp_last_rendereds (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  updated_at datetime,
+  job_id integer DEFAULT 0 NOT NULL,
+  PRIMARY KEY (id),
+  CONSTRAINT fk_last_rendereds_job FOREIGN KEY (job_id) REFERENCES jobs(id) ON DELETE CASCADE
+);
+INSERT INTO temp_last_rendereds SELECT * FROM last_rendereds;
+DROP TABLE last_rendereds;
+ALTER TABLE temp_last_rendereds RENAME TO last_rendereds;
+
+CREATE TABLE temp_task_dependencies (
+  task_id integer NOT NULL,
+  dependency_id integer NOT NULL,
+  PRIMARY KEY (task_id, dependency_id),
+  CONSTRAINT fk_task_dependencies_task FOREIGN KEY (task_id) REFERENCES tasks(id) ON DELETE CASCADE,
+  CONSTRAINT fk_task_dependencies_dependencies FOREIGN KEY (dependency_id) REFERENCES tasks(id) ON DELETE CASCADE
+);
+INSERT INTO temp_task_dependencies SELECT * FROM task_dependencies;
+DROP TABLE task_dependencies;
+ALTER TABLE temp_task_dependencies RENAME TO task_dependencies;
+
+CREATE TABLE temp_task_failures (
+  created_at datetime NOT NULL,
+  task_id integer NOT NULL,
+  worker_id integer NOT NULL,
+  PRIMARY KEY (task_id, worker_id),
+  CONSTRAINT fk_task_failures_task FOREIGN KEY (task_id) REFERENCES tasks(id) ON DELETE CASCADE,
+  CONSTRAINT fk_task_failures_worker FOREIGN KEY (worker_id) REFERENCES workers(id) ON DELETE CASCADE
+);
+INSERT INTO temp_task_failures SELECT * FROM task_failures;
+DROP TABLE task_failures;
+ALTER TABLE temp_task_failures RENAME TO task_failures;
+
+CREATE TABLE temp_worker_tag_membership (
+  worker_tag_id integer NOT NULL,
+  worker_id integer NOT NULL,
+  PRIMARY KEY (worker_tag_id, worker_id),
+  CONSTRAINT fk_worker_tag_membership_worker_tag FOREIGN KEY (worker_tag_id) REFERENCES worker_tags(id) ON DELETE CASCADE,
+  CONSTRAINT fk_worker_tag_membership_worker FOREIGN KEY (worker_id) REFERENCES workers(id) ON DELETE CASCADE
+);
+INSERT INTO temp_worker_tag_membership SELECT * FROM worker_tag_membership;
+DROP TABLE worker_tag_membership;
+ALTER TABLE temp_worker_tag_membership RENAME TO worker_tag_membership;
+
+CREATE TABLE temp_worker_tags (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  updated_at datetime,
+  uuid varchar(36) UNIQUE DEFAULT '' NOT NULL,
+  name varchar(64) UNIQUE DEFAULT '' NOT NULL,
+  description varchar(255) DEFAULT '' NOT NULL,
+  PRIMARY KEY (id)
+);
+INSERT INTO temp_worker_tags SELECT * FROM worker_tags;
+DROP TABLE worker_tags;
+ALTER TABLE temp_worker_tags RENAME TO worker_tags;
+
+CREATE TABLE temp_jobs (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  updated_at datetime,
+  uuid varchar(36) UNIQUE DEFAULT '' NOT NULL,
+  name varchar(64) DEFAULT '' NOT NULL,
+  job_type varchar(32) DEFAULT '' NOT NULL,
+  priority smallint DEFAULT 0 NOT NULL,
+  status varchar(32) DEFAULT '' NOT NULL,
+  activity varchar(255) DEFAULT '' NOT NULL,
+  settings jsonb NOT NULL,
+  metadata jsonb NOT NULL,
+  delete_requested_at datetime,
+  storage_shaman_checkout_id varchar(255) DEFAULT '' NOT NULL,
+  worker_tag_id integer,
+  PRIMARY KEY (id),
+  CONSTRAINT fk_jobs_worker_tag FOREIGN KEY (worker_tag_id) REFERENCES worker_tags(id) ON DELETE SET NULL
+);
+-- This is using an explicit set of columns, as my development machine had an
+-- extra column in there that caused errors. If anybody ever ran a beta where
+-- the `worker_tag_id` was called `worker_cluster_id`, they'd have that extra
+-- column too.
+INSERT INTO temp_jobs SELECT
+  id,
+  created_at,
+  updated_at,
+  uuid,
+  name,
+  job_type,
+  priority,
+  status,
+  activity,
+  settings,
+  metadata,
+  delete_requested_at,
+  storage_shaman_checkout_id,
+  worker_tag_id
+FROM jobs;
+DROP TABLE jobs;
+ALTER TABLE temp_jobs RENAME TO jobs;
+
+CREATE TABLE temp_workers (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  updated_at datetime,
+  uuid varchar(36) UNIQUE DEFAULT '' NOT NULL,
+  secret varchar(255) DEFAULT '' NOT NULL,
+  name varchar(64) DEFAULT '' NOT NULL,
+  address varchar(39) DEFAULT '' NOT NULL,
+  platform varchar(16) DEFAULT '' NOT NULL,
+  software varchar(32) DEFAULT '' NOT NULL,
+  status varchar(16) DEFAULT '' NOT NULL,
+  last_seen_at datetime,
+  status_requested varchar(16) DEFAULT '' NOT NULL,
+  lazy_status_request smallint DEFAULT false NOT NULL,
+  supported_task_types varchar(255) DEFAULT '' NOT NULL,
+  deleted_at datetime,
+  can_restart smallint DEFAULT false NOT NULL,
+  PRIMARY KEY (id)
+);
+UPDATE workers SET supported_task_types = '' where supported_task_types is NULL;
+INSERT INTO temp_workers SELECT * FROM workers;
+DROP TABLE workers;
+ALTER TABLE temp_workers RENAME TO workers;
+
+CREATE TABLE temp_job_blocks (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  job_id integer DEFAULT 0 NOT NULL,
+  worker_id integer DEFAULT 0 NOT NULL,
+  task_type text NOT NULL,
+  PRIMARY KEY (id),
+  CONSTRAINT fk_job_blocks_job FOREIGN KEY (job_id) REFERENCES jobs(id) ON DELETE CASCADE,
+  CONSTRAINT fk_job_blocks_worker FOREIGN KEY (worker_id) REFERENCES workers(id) ON DELETE CASCADE
+);
+INSERT INTO temp_job_blocks SELECT * FROM job_blocks;
+DROP TABLE job_blocks;
+ALTER TABLE temp_job_blocks RENAME TO job_blocks;
+
+CREATE TABLE temp_sleep_schedules (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  updated_at datetime,
+  worker_id integer UNIQUE DEFAULT 0 NOT NULL,
+  is_active numeric DEFAULT false NOT NULL,
+  days_of_week text DEFAULT '' NOT NULL,
+  start_time text DEFAULT '' NOT NULL,
+  end_time text DEFAULT '' NOT NULL,
+  next_check datetime,
+  PRIMARY KEY (id),
+  CONSTRAINT fk_sleep_schedules_worker FOREIGN KEY (worker_id) REFERENCES workers(id) ON DELETE CASCADE
+);
+INSERT INTO temp_sleep_schedules SELECT * FROM sleep_schedules;
+DROP TABLE sleep_schedules;
+ALTER TABLE temp_sleep_schedules RENAME TO sleep_schedules;
+
+CREATE TABLE temp_tasks (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  updated_at datetime,
+  uuid varchar(36) UNIQUE DEFAULT '' NOT NULL,
+  name varchar(64) DEFAULT '' NOT NULL,
+  type varchar(32) DEFAULT '' NOT NULL,
+  job_id integer DEFAULT 0 NOT NULL,
+  priority smallint DEFAULT 50 NOT NULL,
+  status varchar(16) DEFAULT '' NOT NULL,
+  worker_id integer,
+  last_touched_at datetime,
+  commands jsonb NOT NULL,
+  activity varchar(255) DEFAULT '' NOT NULL,
+  PRIMARY KEY (id),
+  CONSTRAINT fk_tasks_job FOREIGN KEY (job_id) REFERENCES jobs(id) ON DELETE CASCADE,
+  CONSTRAINT fk_tasks_worker FOREIGN KEY (worker_id) REFERENCES workers(id) ON DELETE SET NULL
+);
+INSERT INTO temp_tasks SELECT * FROM tasks;
+DROP TABLE tasks;
+ALTER TABLE temp_tasks RENAME TO tasks;
+
+-- Recreate the indices on the new tables.
+CREATE INDEX idx_worker_tags_uuid ON worker_tags(uuid);
+CREATE INDEX idx_jobs_uuid ON jobs(uuid);
+CREATE INDEX idx_workers_address ON workers(address);
+CREATE INDEX idx_workers_last_seen_at ON workers(last_seen_at);
+CREATE INDEX idx_workers_deleted_at ON workers(deleted_at);
+CREATE INDEX idx_workers_uuid ON workers(uuid);
+CREATE UNIQUE INDEX job_worker_tasktype ON job_blocks(job_id, worker_id, task_type);
+CREATE INDEX idx_sleep_schedules_is_active ON sleep_schedules(is_active);
+CREATE INDEX idx_sleep_schedules_worker_id ON sleep_schedules(worker_id);
+CREATE INDEX idx_tasks_uuid ON tasks(uuid);
+CREATE INDEX idx_tasks_last_touched_at ON tasks(last_touched_at);
+
+-- +goose Down
+
+CREATE TABLE `temp_last_rendereds` (
+  `id` integer,
+  `created_at` datetime,
+  `updated_at` datetime,
+  `job_id` integer DEFAULT 0,
+  PRIMARY KEY (`id`),
+  CONSTRAINT `fk_last_rendereds_job` FOREIGN KEY (`job_id`) REFERENCES `jobs`(`id`) ON DELETE CASCADE
+);
+INSERT INTO temp_last_rendereds SELECT * FROM last_rendereds;
+DROP TABLE last_rendereds;
+ALTER TABLE temp_last_rendereds RENAME TO `last_rendereds`;
+
+CREATE TABLE `temp_task_dependencies` (
+  `task_id` integer,
+  `dependency_id` integer,
+  PRIMARY KEY (`task_id`, `dependency_id`),
+  CONSTRAINT `fk_task_dependencies_task` FOREIGN KEY (`task_id`) REFERENCES `tasks`(`id`) ON DELETE CASCADE,
+  CONSTRAINT `fk_task_dependencies_dependencies` FOREIGN KEY (`dependency_id`) REFERENCES `tasks`(`id`) ON DELETE CASCADE
+);
+INSERT INTO temp_task_dependencies SELECT * FROM task_dependencies;
+DROP TABLE task_dependencies;
+ALTER TABLE temp_task_dependencies RENAME TO `task_dependencies`;
+
+CREATE TABLE `temp_task_failures` (
+  `created_at` datetime,
+  `task_id` integer,
+  `worker_id` integer,
+  PRIMARY KEY (`task_id`, `worker_id`),
+  CONSTRAINT `fk_task_failures_task` FOREIGN KEY (`task_id`) REFERENCES `tasks`(`id`) ON DELETE CASCADE,
+  CONSTRAINT `fk_task_failures_worker` FOREIGN KEY (`worker_id`) REFERENCES `workers`(`id`) ON DELETE CASCADE
+);
+INSERT INTO temp_task_failures SELECT * FROM task_failures;
+DROP TABLE task_failures;
+ALTER TABLE temp_task_failures RENAME TO `task_failures`;
+
+CREATE TABLE `temp_worker_tag_membership` (
+  `worker_tag_id` integer,
+  `worker_id` integer,
+  PRIMARY KEY (`worker_tag_id`, `worker_id`),
+  CONSTRAINT `fk_worker_tag_membership_worker_tag` FOREIGN KEY (`worker_tag_id`) REFERENCES `worker_tags`(`id`) ON DELETE CASCADE,
+  CONSTRAINT `fk_worker_tag_membership_worker` FOREIGN KEY (`worker_id`) REFERENCES `workers`(`id`) ON DELETE CASCADE
+);
+INSERT INTO temp_worker_tag_membership SELECT * FROM worker_tag_membership;
+DROP TABLE worker_tag_membership;
+ALTER TABLE temp_worker_tag_membership RENAME TO `worker_tag_membership`;
+
+CREATE TABLE "temp_worker_tags" (
+  `id` integer,
+  `created_at` datetime,
+  `updated_at` datetime,
+  `uuid` char(36) UNIQUE DEFAULT "",
+  `name` varchar(64) UNIQUE DEFAULT "",
+  `description` varchar(255) DEFAULT "",
+  PRIMARY KEY (`id`)
+);
+INSERT INTO temp_worker_tags SELECT * FROM worker_tags;
+DROP TABLE worker_tags;
+ALTER TABLE temp_worker_tags RENAME TO `worker_tags`;
+
+CREATE TABLE "temp_jobs" (
+  `id` integer,
+  `created_at` datetime,
+  `updated_at` datetime,
+  `uuid` char(36) UNIQUE DEFAULT "",
+  `name` varchar(64) DEFAULT "",
+  `job_type` varchar(32) DEFAULT "",
+  `priority` smallint DEFAULT 0,
+  `status` varchar(32) DEFAULT "",
+  `activity` varchar(255) DEFAULT "",
+  `settings` jsonb,
+  `metadata` jsonb,
+  `delete_requested_at` datetime,
+  `storage_shaman_checkout_id` varchar(255) DEFAULT "",
+  `worker_tag_id` integer,
+  PRIMARY KEY(`id`),
+  CONSTRAINT `fk_jobs_worker_tag` FOREIGN KEY(`worker_tag_id`) REFERENCES `worker_tags`(`id`) ON DELETE SET NULL
+);
+INSERT INTO temp_jobs SELECT * FROM jobs;
+DROP TABLE jobs;
+ALTER TABLE temp_jobs RENAME TO `jobs`;
+
+CREATE TABLE "temp_workers" (
+  `id` integer,
+  `created_at` datetime,
+  `updated_at` datetime,
+  `deleted_at` datetime,
+  `uuid` char(36) UNIQUE DEFAULT "",
+  `secret` varchar(255) DEFAULT "",
+  `name` varchar(64) DEFAULT "",
+  `address` varchar(39) DEFAULT "",
+  `platform` varchar(16) DEFAULT "",
+  `software` varchar(32) DEFAULT "",
+  `status` varchar(16) DEFAULT "",
+  `last_seen_at` datetime,
+  `status_requested` varchar(16) DEFAULT "",
+  `lazy_status_request` smallint DEFAULT false,
+  `supported_task_types` varchar(255) DEFAULT "",
+  `can_restart` smallint DEFAULT false,
+  PRIMARY KEY (`id`)
+);
+INSERT INTO temp_workers SELECT * FROM workers;
+DROP TABLE workers;
+ALTER TABLE temp_workers RENAME TO `workers`;
+
+CREATE TABLE "temp_job_blocks" (
+  `id` integer,
+  `created_at` datetime,
+  `job_id` integer DEFAULT 0,
+  `worker_id` integer DEFAULT 0,
+  `task_type` text,
+  PRIMARY KEY (`id`),
+  CONSTRAINT `fk_job_blocks_job` FOREIGN KEY (`job_id`) REFERENCES `jobs`(`id`) ON DELETE CASCADE,
+  CONSTRAINT `fk_job_blocks_worker` FOREIGN KEY (`worker_id`) REFERENCES `workers`(`id`) ON DELETE CASCADE
+);
+INSERT INTO temp_job_blocks SELECT * FROM job_blocks;
+DROP TABLE job_blocks;
+ALTER TABLE temp_job_blocks RENAME TO `job_blocks`;
+
+CREATE TABLE "temp_sleep_schedules" (
+  `id` integer,
+  `created_at` datetime,
+  `updated_at` datetime,
+  `worker_id` integer UNIQUE DEFAULT 0,
+  `is_active` numeric DEFAULT false,
+  `days_of_week` text DEFAULT "",
+  `start_time` text DEFAULT "",
+  `end_time` text DEFAULT "",
+  `next_check` datetime,
+  PRIMARY KEY (`id`),
+  CONSTRAINT `fk_sleep_schedules_worker` FOREIGN KEY (`worker_id`) REFERENCES `workers`(`id`) ON DELETE CASCADE
+);
+INSERT INTO temp_sleep_schedules SELECT * FROM sleep_schedules;
+DROP TABLE sleep_schedules;
+ALTER TABLE temp_sleep_schedules RENAME TO `sleep_schedules`;
+
+CREATE TABLE "temp_tasks" (
+  `id` integer,
+  `created_at` datetime,
+  `updated_at` datetime,
+  `uuid` char(36) UNIQUE DEFAULT "",
+  `name` varchar(64) DEFAULT "",
+  `type` varchar(32) DEFAULT "",
+  `job_id` integer DEFAULT 0,
+  `priority` smallint DEFAULT 50,
+  `status` varchar(16) DEFAULT "",
+  `worker_id` integer,
+  `last_touched_at` datetime,
+  `commands` jsonb,
+  `activity` varchar(255) DEFAULT "",
+  PRIMARY KEY (`id`),
+  CONSTRAINT `fk_tasks_job` FOREIGN KEY (`job_id`) REFERENCES `jobs`(`id`) ON DELETE CASCADE,
+  CONSTRAINT `fk_tasks_worker` FOREIGN KEY (`worker_id`) REFERENCES `workers`(`id`) ON DELETE
+  SET NULL
+);
+INSERT INTO temp_tasks SELECT * FROM tasks;
+DROP TABLE tasks;
+ALTER TABLE temp_tasks RENAME TO `tasks`;
+
+CREATE INDEX `idx_worker_tags_uuid` ON `worker_tags`(`uuid`);
+CREATE INDEX `idx_jobs_uuid` ON `jobs`(`uuid`);
+CREATE INDEX `idx_workers_address` ON `workers`(`address`);
+CREATE INDEX `idx_workers_last_seen_at` ON `workers`(`last_seen_at`);
+CREATE INDEX `idx_workers_deleted_at` ON `workers`(`deleted_at`);
+CREATE INDEX `idx_workers_uuid` ON `workers`(`uuid`);
+CREATE UNIQUE INDEX `job_worker_tasktype` ON `job_blocks`(`job_id`, `worker_id`, `task_type`);
+CREATE INDEX `idx_sleep_schedules_is_active` ON `sleep_schedules`(`is_active`);
+CREATE INDEX `idx_sleep_schedules_worker_id` ON `sleep_schedules`(`worker_id`);
+CREATE INDEX `idx_tasks_uuid` ON `tasks`(`uuid`);
+CREATE INDEX `idx_tasks_last_touched_at` ON `tasks`(`last_touched_at`);
--- a/internal/manager/persistence/sqlc/db.go
+++ b/internal/manager/persistence/sqlc/db.go
@ -0,0 +1,31 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.25.0
+
+package sqlc
+
+import (
+	"context"
+	"database/sql"
+)
+
+type DBTX interface {
+	ExecContext(context.Context, string, ...interface{}) (sql.Result, error)
+	PrepareContext(context.Context, string) (*sql.Stmt, error)
+	QueryContext(context.Context, string, ...interface{}) (*sql.Rows, error)
+	QueryRowContext(context.Context, string, ...interface{}) *sql.Row
+}
+
+func New(db DBTX) *Queries {
+	return &Queries{db: db}
+}
+
+type Queries struct {
+	db DBTX
+}
+
+func (q *Queries) WithTx(tx *sql.Tx) *Queries {
+	return &Queries{
+		db: tx,
+	}
+}
--- a/internal/manager/persistence/sqlc/models.go
+++ b/internal/manager/persistence/sqlc/models.go
@ -0,0 +1,115 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.25.0
+
+package sqlc
+
+import (
+	"database/sql"
+	"encoding/json"
+	"time"
+)
+
+type Job struct {
+	ID                      int64
+	CreatedAt               time.Time
+	UpdatedAt               sql.NullTime
+	Uuid                    string
+	Name                    string
+	JobType                 string
+	Priority                int64
+	Status                  string
+	Activity                string
+	Settings                json.RawMessage
+	Metadata                json.RawMessage
+	DeleteRequestedAt       sql.NullTime
+	StorageShamanCheckoutID string
+	WorkerTagID             sql.NullInt64
+}
+
+type JobBlock struct {
+	ID        int64
+	CreatedAt time.Time
+	JobID     int64
+	WorkerID  int64
+	TaskType  string
+}
+
+type LastRendered struct {
+	ID        int64
+	CreatedAt time.Time
+	UpdatedAt sql.NullTime
+	JobID     int64
+}
+
+type SleepSchedule struct {
+	ID         int64
+	CreatedAt  time.Time
+	UpdatedAt  sql.NullTime
+	WorkerID   int64
+	IsActive   float64
+	DaysOfWeek string
+	StartTime  string
+	EndTime    string
+	NextCheck  sql.NullTime
+}
+
+type Task struct {
+	ID            int64
+	CreatedAt     time.Time
+	UpdatedAt     sql.NullTime
+	Uuid          string
+	Name          string
+	Type          string
+	JobID         int64
+	Priority      int64
+	Status        string
+	WorkerID      sql.NullInt64
+	LastTouchedAt sql.NullTime
+	Commands      json.RawMessage
+	Activity      string
+}
+
+type TaskDependency struct {
+	TaskID       int64
+	DependencyID int64
+}
+
+type TaskFailure struct {
+	CreatedAt time.Time
+	TaskID    int64
+	WorkerID  int64
+}
+
+type Worker struct {
+	ID                 int64
+	CreatedAt          time.Time
+	UpdatedAt          sql.NullTime
+	Uuid               string
+	Secret             string
+	Name               string
+	Address            string
+	Platform           string
+	Software           string
+	Status             string
+	LastSeenAt         sql.NullTime
+	StatusRequested    string
+	LazyStatusRequest  int64
+	SupportedTaskTypes string
+	DeletedAt          sql.NullTime
+	CanRestart         int64
+}
+
+type WorkerTag struct {
+	ID          int64
+	CreatedAt   time.Time
+	UpdatedAt   sql.NullTime
+	Uuid        string
+	Name        string
+	Description string
+}
+
+type WorkerTagMembership struct {
+	WorkerTagID int64
+	WorkerID    int64
+}
--- a/internal/manager/persistence/sqlc/query.sql
+++ b/internal/manager/persistence/sqlc/query.sql
@ -0,0 +1,35 @@
+
+-- Jobs / Tasks queries
+--
+
+-- name: CreateJob :exec
+INSERT INTO jobs (
+  created_at,
+  uuid,
+  name,
+  job_type,
+  priority,
+  status,
+  activity,
+  settings,
+  metadata,
+  storage_shaman_checkout_id
+)
+VALUES ( ?, ?, ?, ?, ?, ?, ?, ?, ?, ? );
+
+-- name: DeleteJob :exec
+DELETE FROM jobs WHERE uuid = ?;
+
+-- name: RequestJobDeletion :exec
+UPDATE jobs SET
+  updated_at = @now,
+  delete_requested_at = @now
+WHERE id = sqlc.arg('job_id');
+
+-- name: FetchTask :one
+SELECT * FROM tasks
+WHERE uuid = ? LIMIT 1;
+
+-- name: FetchJob :one
+SELECT * FROM jobs
+WHERE uuid = ? LIMIT 1;
--- a/internal/manager/persistence/sqlc/query.sql.go
+++ b/internal/manager/persistence/sqlc/query.sql.go
@ -0,0 +1,139 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.25.0
+// source: query.sql
+
+package sqlc
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+	"time"
+)
+
+const createJob = `-- name: CreateJob :exec
+
+INSERT INTO jobs (
+  created_at,
+  uuid,
+  name,
+  job_type,
+  priority,
+  status,
+  activity,
+  settings,
+  metadata,
+  storage_shaman_checkout_id
+)
+VALUES ( ?, ?, ?, ?, ?, ?, ?, ?, ?, ? )
+`
+
+type CreateJobParams struct {
+	CreatedAt               time.Time
+	Uuid                    string
+	Name                    string
+	JobType                 string
+	Priority                int64
+	Status                  string
+	Activity                string
+	Settings                json.RawMessage
+	Metadata                json.RawMessage
+	StorageShamanCheckoutID string
+}
+
+// Jobs / Tasks queries
+func (q *Queries) CreateJob(ctx context.Context, arg CreateJobParams) error {
+	_, err := q.db.ExecContext(ctx, createJob,
+		arg.CreatedAt,
+		arg.Uuid,
+		arg.Name,
+		arg.JobType,
+		arg.Priority,
+		arg.Status,
+		arg.Activity,
+		arg.Settings,
+		arg.Metadata,
+		arg.StorageShamanCheckoutID,
+	)
+	return err
+}
+
+const deleteJob = `-- name: DeleteJob :exec
+DELETE FROM jobs WHERE uuid = ?
+`
+
+func (q *Queries) DeleteJob(ctx context.Context, uuid string) error {
+	_, err := q.db.ExecContext(ctx, deleteJob, uuid)
+	return err
+}
+
+const fetchJob = `-- name: FetchJob :one
+SELECT id, created_at, updated_at, uuid, name, job_type, priority, status, activity, settings, metadata, delete_requested_at, storage_shaman_checkout_id, worker_tag_id FROM jobs
+WHERE uuid = ? LIMIT 1
+`
+
+func (q *Queries) FetchJob(ctx context.Context, uuid string) (Job, error) {
+	row := q.db.QueryRowContext(ctx, fetchJob, uuid)
+	var i Job
+	err := row.Scan(
+		&i.ID,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+		&i.Uuid,
+		&i.Name,
+		&i.JobType,
+		&i.Priority,
+		&i.Status,
+		&i.Activity,
+		&i.Settings,
+		&i.Metadata,
+		&i.DeleteRequestedAt,
+		&i.StorageShamanCheckoutID,
+		&i.WorkerTagID,
+	)
+	return i, err
+}
+
+const fetchTask = `-- name: FetchTask :one
+SELECT id, created_at, updated_at, uuid, name, type, job_id, priority, status, worker_id, last_touched_at, commands, activity FROM tasks
+WHERE uuid = ? LIMIT 1
+`
+
+func (q *Queries) FetchTask(ctx context.Context, uuid string) (Task, error) {
+	row := q.db.QueryRowContext(ctx, fetchTask, uuid)
+	var i Task
+	err := row.Scan(
+		&i.ID,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+		&i.Uuid,
+		&i.Name,
+		&i.Type,
+		&i.JobID,
+		&i.Priority,
+		&i.Status,
+		&i.WorkerID,
+		&i.LastTouchedAt,
+		&i.Commands,
+		&i.Activity,
+	)
+	return i, err
+}
+
+const requestJobDeletion = `-- name: RequestJobDeletion :exec
+UPDATE jobs SET
+  updated_at = ?1,
+  delete_requested_at = ?1
+WHERE id = ?2
+`
+
+type RequestJobDeletionParams struct {
+	Now   sql.NullTime
+	JobID int64
+}
+
+func (q *Queries) RequestJobDeletion(ctx context.Context, arg RequestJobDeletionParams) error {
+	_, err := q.db.ExecContext(ctx, requestJobDeletion, arg.Now, arg.JobID)
+	return err
+}
--- a/internal/manager/persistence/sqlc/schema.sql
+++ b/internal/manager/persistence/sqlc/schema.sql
@ -0,0 +1,128 @@
+CREATE TABLE job_blocks (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  job_id integer DEFAULT 0 NOT NULL,
+  worker_id integer DEFAULT 0 NOT NULL,
+  task_type text NOT NULL,
+  PRIMARY KEY (id),
+  CONSTRAINT fk_job_blocks_job FOREIGN KEY (job_id) REFERENCES jobs(id) ON DELETE CASCADE,
+  CONSTRAINT fk_job_blocks_worker FOREIGN KEY (worker_id) REFERENCES workers(id) ON DELETE CASCADE
+);
+CREATE TABLE jobs (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  updated_at datetime,
+  uuid varchar(36) UNIQUE DEFAULT '' NOT NULL,
+  name varchar(64) DEFAULT '' NOT NULL,
+  job_type varchar(32) DEFAULT '' NOT NULL,
+  priority smallint DEFAULT 0 NOT NULL,
+  status varchar(32) DEFAULT '' NOT NULL,
+  activity varchar(255) DEFAULT '' NOT NULL,
+  settings jsonb NOT NULL,
+  metadata jsonb NOT NULL,
+  delete_requested_at datetime,
+  storage_shaman_checkout_id varchar(255) DEFAULT '' NOT NULL,
+  worker_tag_id integer,
+  PRIMARY KEY (id),
+  CONSTRAINT fk_jobs_worker_tag FOREIGN KEY (worker_tag_id) REFERENCES worker_tags(id) ON DELETE SET NULL
+);
+CREATE TABLE last_rendereds (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  updated_at datetime,
+  job_id integer DEFAULT 0 NOT NULL,
+  PRIMARY KEY (id),
+  CONSTRAINT fk_last_rendereds_job FOREIGN KEY (job_id) REFERENCES jobs(id) ON DELETE CASCADE
+);
+CREATE TABLE sleep_schedules (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  updated_at datetime,
+  worker_id integer UNIQUE DEFAULT 0 NOT NULL,
+  is_active numeric DEFAULT false NOT NULL,
+  days_of_week text DEFAULT '' NOT NULL,
+  start_time text DEFAULT '' NOT NULL,
+  end_time text DEFAULT '' NOT NULL,
+  next_check datetime,
+  PRIMARY KEY (id),
+  CONSTRAINT fk_sleep_schedules_worker FOREIGN KEY (worker_id) REFERENCES workers(id) ON DELETE CASCADE
+);
+CREATE TABLE task_dependencies (
+  task_id integer NOT NULL,
+  dependency_id integer NOT NULL,
+  PRIMARY KEY (task_id, dependency_id),
+  CONSTRAINT fk_task_dependencies_task FOREIGN KEY (task_id) REFERENCES tasks(id) ON DELETE CASCADE,
+  CONSTRAINT fk_task_dependencies_dependencies FOREIGN KEY (dependency_id) REFERENCES tasks(id) ON DELETE CASCADE
+);
+CREATE TABLE task_failures (
+  created_at datetime NOT NULL,
+  task_id integer NOT NULL,
+  worker_id integer NOT NULL,
+  PRIMARY KEY (task_id, worker_id),
+  CONSTRAINT fk_task_failures_task FOREIGN KEY (task_id) REFERENCES tasks(id) ON DELETE CASCADE,
+  CONSTRAINT fk_task_failures_worker FOREIGN KEY (worker_id) REFERENCES workers(id) ON DELETE CASCADE
+);
+CREATE TABLE tasks (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  updated_at datetime,
+  uuid varchar(36) UNIQUE DEFAULT '' NOT NULL,
+  name varchar(64) DEFAULT '' NOT NULL,
+  type varchar(32) DEFAULT '' NOT NULL,
+  job_id integer DEFAULT 0 NOT NULL,
+  priority smallint DEFAULT 50 NOT NULL,
+  status varchar(16) DEFAULT '' NOT NULL,
+  worker_id integer,
+  last_touched_at datetime,
+  commands jsonb NOT NULL,
+  activity varchar(255) DEFAULT '' NOT NULL,
+  PRIMARY KEY (id),
+  CONSTRAINT fk_tasks_job FOREIGN KEY (job_id) REFERENCES jobs(id) ON DELETE CASCADE,
+  CONSTRAINT fk_tasks_worker FOREIGN KEY (worker_id) REFERENCES workers(id) ON DELETE SET NULL
+);
+CREATE TABLE worker_tag_membership (
+  worker_tag_id integer NOT NULL,
+  worker_id integer NOT NULL,
+  PRIMARY KEY (worker_tag_id, worker_id),
+  CONSTRAINT fk_worker_tag_membership_worker_tag FOREIGN KEY (worker_tag_id) REFERENCES worker_tags(id) ON DELETE CASCADE,
+  CONSTRAINT fk_worker_tag_membership_worker FOREIGN KEY (worker_id) REFERENCES workers(id) ON DELETE CASCADE
+);
+CREATE TABLE worker_tags (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  updated_at datetime,
+  uuid varchar(36) UNIQUE DEFAULT '' NOT NULL,
+  name varchar(64) UNIQUE DEFAULT '' NOT NULL,
+  description varchar(255) DEFAULT '' NOT NULL,
+  PRIMARY KEY (id)
+);
+CREATE TABLE workers (
+  id integer NOT NULL,
+  created_at datetime NOT NULL,
+  updated_at datetime,
+  uuid varchar(36) UNIQUE DEFAULT '' NOT NULL,
+  secret varchar(255) DEFAULT '' NOT NULL,
+  name varchar(64) DEFAULT '' NOT NULL,
+  address varchar(39) DEFAULT '' NOT NULL,
+  platform varchar(16) DEFAULT '' NOT NULL,
+  software varchar(32) DEFAULT '' NOT NULL,
+  status varchar(16) DEFAULT '' NOT NULL,
+  last_seen_at datetime,
+  status_requested varchar(16) DEFAULT '' NOT NULL,
+  lazy_status_request smallint DEFAULT false NOT NULL,
+  supported_task_types varchar(255) DEFAULT '' NOT NULL,
+  deleted_at datetime,
+  can_restart smallint DEFAULT false NOT NULL,
+  PRIMARY KEY (id)
+);
+CREATE INDEX idx_jobs_uuid ON jobs(uuid);
+CREATE INDEX idx_sleep_schedules_is_active ON sleep_schedules(is_active);
+CREATE INDEX idx_sleep_schedules_worker_id ON sleep_schedules(worker_id);
+CREATE INDEX idx_tasks_last_touched_at ON tasks(last_touched_at);
+CREATE INDEX idx_tasks_uuid ON tasks(uuid);
+CREATE INDEX idx_worker_tags_uuid ON worker_tags(uuid);
+CREATE INDEX idx_workers_address ON workers(address);
+CREATE INDEX idx_workers_deleted_at ON workers(deleted_at);
+CREATE INDEX idx_workers_last_seen_at ON workers(last_seen_at);
+CREATE INDEX idx_workers_uuid ON workers(uuid);
+CREATE UNIQUE INDEX job_worker_tasktype ON job_blocks(job_id, worker_id, task_type);
--- a/sqlc.yaml
+++ b/sqlc.yaml
@ -0,0 +1,13 @@
+version: "2"
+sql:
+  - engine: "sqlite"
+    schema: "internal/manager/persistence/sqlc/schema.sql"
+    queries: "internal/manager/persistence/sqlc/query.sql"
+    gen:
+      go:
+        out: "internal/manager/persistence/sqlc"
+        overrides:
+          - db_type: "jsonb"
+            go_type:
+              import: "encoding/json"
+              type: "RawMessage"
--- a/web/project-website/content/development/database/_index.md
+++ b/web/project-website/content/development/database/_index.md
@ -3,10 +3,27 @@ title: Database
 weight: 50
 ---

-Flamenco Manager and Worker use SQLite as database, and Gorm as
-object-relational mapper.
+Flamenco Manager and Worker use SQLite as database, and GORM as
+object-relational mapper (but see the note below).

 Since SQLite has limited support for altering table schemas, migration requires
 copying old data to a temporary table with the new schema, then swap out the
 tables. Because of this, avoid `NOT NULL` columns, as they will be problematic
 in this process.
+
+## SQLC
+
+Flamenco mostly uses [GORM][gorm] for interfacing with its SQLite database. This
+is gradually being phased out, to be replaced with [SQLC][sqlc].
+
+To generate the SQLC schema file:
+```sh
+make db-migrate-up
+go run ./cmd/sqlc-export-schema
+```
+
+To generate Go code with SQLC after changing `schema.sql` or `queries.sql`:
+```sh
+go install github.com/sqlc-dev/sqlc/cmd/sqlc@latest
+sqlc generate
+```