assert( p->db );
    blob_zero(&p->tmp);
    sqlite3_exec(p->db,
        "PRAGMA page_size=512;"
        "PRAGMA journal_mode = off;"
        "PRAGMA cache_spill = off;"
        "BEGIN;"
        "CREATE TABLE sqlar("
          "name TEXT PRIMARY KEY,  -- name of the file\n"
          "mode INT,               -- access permissions\n"
          "mtime INT,              -- last modification time\n"
          "sz INT,                 -- original file size\n"
          "data BLOB               -- compressed content\n"
        "CREATE TABLE sqlar(\n"
          "  name TEXT PRIMARY KEY,  -- name of the file\n"
          "  mode INT,               -- access permissions\n"
          "  mtime INT,              -- last modification time\n"
          "  sz INT,                 -- original file size\n"
          "  data BLOB               -- compressed content\n"
        ");", 0, 0, 0
    );
    sqlite3_prepare(p->db,
        "INSERT INTO sqlar VALUES(?, ?, ?, ?, ?)", -1,
        &p->pInsert, 0
    );
    assert( p->pInsert );