open method
void
open()
Implementation
void open() {
database = SqliteDb(_databasePath);
database.open(populateFunction: (SqliteDb db) {
if (!db.hasTable(TableName(TABLE_TILES, schemaSupported: false))) {
db.execute(CREATE_TILES);
db.execute(CREATE_METADATA);
db.execute(INDEX_TILES);
db.execute(INDEX_METADATA);
}
});
}