usage_cursor.txt

来自「LiteSQL is a C++ library that integrates」· 文本 代码 · 共 33 行

/* LiteSQL - Documentation - Using Cursor
 * 
 * By Tero Laitinen 
 * 
 * See LICENSE for copyright information. */
/* \file usage_cursor.txt
    Manual */

/** \page usage_cursor Using Cursor

Often it is not necessary to fetch all objects to memory and then process them.
Memory usage can be minimized using template class Cursor which returns one object at
a time.

Creating a cursor(two ways):
\code
Cursor<Record> cur1 = db.cursor(SelectQuery().result("id_").source("Person_"));
Cursor<Person> cur2 = select<Person>(db).cursor();
\endcode

Iterating through the result set:
\code
for (;!cur.rowsLeft(); cur++)
    cout << (*cur).name << endl;
\endcode

The remaining contents of the result set can be retrieved with dump-method:
\code
vector<Person> rest = cur.dump();
\endcode
*/