mapserver/server/mapobjectdb/sqlite_migrate.go

package mapobjectdb

import (
	"database/sql"
	_ "github.com/mattn/go-sqlite3"
	"github.com/sirupsen/logrus"
	"time"
)

const migrateScript = `
PRAGMA foreign_keys = ON;
PRAGMA journal_mode = MEMORY;
-- PRAGMA synchronous = OFF;

create table if not exists objects(
	id integer primary key autoincrement,
  x int,
  y int,
	z int,
	posx int,
	posy int,
	posz int,
	type varchar,
  mtime bigint
);

create index if not exists objects_pos on objects(posx,posy,posz);
create index if not exists objects_pos_type on objects(posx,posy,posz,type);

create table if not exists object_attributes(
	objectid integer not null,
	key varchar not null,
	value varchar not null,
	FOREIGN KEY (objectid) references objects(id) ON DELETE CASCADE
	primary key(objectid, key)
);

create table if not exists tiles(
  data blob,
  mtime bigint,
  layerid int,
  x int,
  y int,
  zoom int,
  primary key(x,y,zoom,layerid)
);
`

type Sqlite3Accessor struct {
	db       *sql.DB
	filename string
}

func (db *Sqlite3Accessor) Migrate() error {
	log.WithFields(logrus.Fields{"filename": db.filename}).Info("Migrating database")
	start := time.Now()
	_, err := db.db.Exec(migrateScript)
	if err != nil {
		return err
	}
	t := time.Now()
	elapsed := t.Sub(start)
	log.WithFields(logrus.Fields{"elapsed": elapsed}).Info("Migration completed")

	return nil
}