message: Set statement to false when close it.
diff: @@ -25,7 +25,7 @@ SQLRETURN SQLSetStmtAttr(SQLHSTMT statement_handle, SQLINTEGER attribute, SQLPOI
  if (new_size < 1) {
  return SQL_ERROR;
  }
  - stmt->odbc_fetcher->rows_to_fetch = new_size;
  + stmt->odbc_fetcher->rowset_size = new_size;
  }
  return SQL_SUCCESS;
  }
  @@ -280,6 +280,7 @@ SQLRETURN SQLFreeStmt(SQLHSTMT statement_handle, SQLUSMALLINT option) {
  return SQL_SUCCESS;
  }
  if (option == SQL_CLOSE) {
  + stmt->open = false;
  stmt->res.reset();
  stmt->odbc_fetcher->ClearChunks();
  // stmt->stmt.reset(); // the statment can be reuse in prepared statement
  