多次执行预准备语句
执行语句后,调用 sqlite3_reset()
会将其恢复到原始状态,以便可以重新执行。
通常,虽然语句本身保持不变,但参数会更改:
const char *sql = "INSERT INTO MyTable(ID, Name) VALUES (?, ?)";
sqlite3_stmt *stmt;
int err;
err = sqlite3_prepare_v2(db, sql, -1, &stmt, NULL);
if (err != SQLITE_OK) {
printf("prepare failed: %s\n", sqlite3_errmsg(db));
return /* failure */;
}
for (...) {
sqlite3_bind_int (stmt, 1, ...); /* ID */
sqlite3_bind_text(stmt, 2, ...); /* name */
err = sqlite3_step(stmt);
if (err != SQLITE_DONE) {
printf("execution failed: %s\n", sqlite3_errmsg(db));
sqlite3_finalize(stmt);
return /* failure */;
}
sqlite3_reset(stmt);
}
sqlite3_finalize(stmt);
return /* success */;