pstmt.execute(env);
if (!pstmt.execute(env)) return null;
  public Value pg_execute(Env env,                          @NotNull Mysqli conn,                          String stmtName,                          Value params)  {    try {      MysqliStatement pstmt = conn.getStatement(stmtName);      ArrayValueImpl arr = (ArrayValueImpl)params;      int sz = arr.size();      for (int i=0; i<sz; i++) {        String p = arr.get(LongValue.create(i)).toString();      }      char buf[] = new char[sz];      for (int i=0; i<sz; i++)        buf[i] = 's';      String types = new String(buf);      Value value[] = arr.getValueArray(env);      pstmt.bind_param(env, types, value);      pstmt.execute(env);      return BooleanValue.TRUE;    } catch (Exception ex) {      return BooleanValue.FALSE;    }  }