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我不完全理解sqlite3_finalize。我最初的代碼。我不完全理解sqlite3_finalize
while (j < Autors.count)
{
if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK)
{
sqlite3_bind_int(compiledStatement, 1, ((AuthorSettings *)[Autors objectAtIndex:j]).authorId);
if(sqlite3_step(compiledStatement) != SQLITE_DONE)
{
NSLog(@"sqlite3_step error %s", sqlite3_errmsg(database));
sqlite3_busy_timeout(database, 5);
}
else
{
if(sqlite3_prepare_v2(database, sqlStatement_1, -1, &compiledStatement, NULL) == SQLITE_OK)
{
sqlite3_bind_int(compiledStatement, 1, bookId);
if(sqlite3_step(compiledStatement) != SQLITE_DONE)
{
NSLog(@"sqlite3_step error %s", sqlite3_errmsg(database));
sqlite3_busy_timeout(database, 5);
}
else j++;
}
else NSLog(@"sqlite3_prepare_v2 error %s", sqlite3_errmsg(database));
}
}
}
sqlite3_finalize(compiledStatement);
我添加了sqlite3_finalize函數。請檢查我。
while (j < Autors.count)
{
sqlite3_finalize(compiledStatement); //**added
if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK)
{
sqlite3_bind_int(compiledStatement, 1, ((AuthorSettings *)[Autors objectAtIndex:j]).authorId);
if(sqlite3_step(compiledStatement) != SQLITE_DONE)
{
NSLog(@"sqlite3_step error %s", sqlite3_errmsg(database));
sqlite3_busy_timeout(database, 5);
}
else
{
sqlite3_finalize(compiledStatement); //**added
if(sqlite3_prepare_v2(database, sqlStatement_1, -1, &compiledStatement, NULL) == SQLITE_OK)
{
sqlite3_bind_int(compiledStatement, 1, bookId);
if(sqlite3_step(compiledStatement) != SQLITE_DONE)
{
NSLog(@"sqlite3_step error %s", sqlite3_errmsg(database));
sqlite3_busy_timeout(database, 5);
}
else j++;
}
else NSLog(@"sqlite3_prepare_v2 error %s", sqlite3_errmsg(database));
}
}
}
sqlite3_finalize(compiledStatement);
如果你使用sqlite3_exec你需要使用sqlite3_finalize呢? – ademar111190 2012-11-06 15:30:17
@ ademar111190正如文檔所述,「調用sqlite3_finalize()函數來刪除準備好的語句。」所以如果你沒有準備一份聲明,就沒有必要確定它。 – 2012-11-06 16:01:52
謝謝,似乎只是,如果我用sqlite3_exec調用sqlite3_finalize有時我得到一個運行時錯誤。 – ademar111190 2012-11-06 17:24:16