iOS - SQLite 批量插入错误答案

【问题标题】：iOS - SQLite bulk INSERT erroriOS - SQLite 批量插入错误
【发布时间】：2012-11-25 14:14:43
【问题描述】：

我需要向我的数据库中插入大量记录，但出现错误：

Prepare-error library routine called out of sequence

这是我的代码：

NSString *databaseName = @"DB.sqlite";
    NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
    NSString *documentsDir = [documentPaths objectAtIndex:0];
    NSString *databasePath = [documentsDir stringByAppendingPathComponent:databaseName];

    sqlite3 *concertsDB;
    const char *dbpath = [databasePath UTF8String];

    if (sqlite3_open(dbpath, &concertsDB) == SQLITE_OK)
    {
        sqlite3_exec(concertsDB, "BEGIN TRANSACTION", 0, 0, 0);
        const char *sqlStatement = "INSERT INTO concertsData VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
        sqlite3_stmt *compiledStatement;

        if (sqlite3_prepare_v2(concertsDB, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) {
            int hasError;

            for (int i=0; i<[events count]; i++) {

                sqlite3_bind_text(compiledStatement, 1, [[[events objectAtIndex:i] title] UTF8String], -1, SQLITE_TRANSIENT);
                sqlite3_bind_int(compiledStatement, 2, [[[events objectAtIndex:i] date] timeIntervalSince1970]);

                sqlite3_bind_text(compiledStatement, 3, [[[events objectAtIndex:i] time] UTF8String], -1, SQLITE_TRANSIENT);

                sqlite3_bind_text(compiledStatement, 4, [[[events objectAtIndex:i] shortDesription] UTF8String], -1, SQLITE_TRANSIENT);

                sqlite3_bind_text(compiledStatement, 5, [[[events objectAtIndex:i] conductor] UTF8String], -1, SQLITE_TRANSIENT);

                sqlite3_bind_text(compiledStatement, 6, [[[events objectAtIndex:i] location] UTF8String], -1, SQLITE_TRANSIENT);

                sqlite3_bind_text(compiledStatement, 7, [[[events objectAtIndex:i] durations] UTF8String], -1, SQLITE_TRANSIENT);

                sqlite3_bind_text(compiledStatement, 8, [[[events objectAtIndex:i] works] UTF8String], -1, SQLITE_TRANSIENT);

                sqlite3_bind_text(compiledStatement, 9, [[[events objectAtIndex:i] solists] UTF8String], -1, SQLITE_TRANSIENT);

                sqlite3_bind_text(compiledStatement, 10, [[[events objectAtIndex:i] fulltext] UTF8String], -1, SQLITE_TRANSIENT);                    

                sqlite3_bind_text(compiledStatement, 11, [[[[events objectAtIndex:i] concertUrl] absoluteString] UTF8String], -1, SQLITE_TRANSIENT);

                sqlite3_bind_text(compiledStatement, 12, [[[[events objectAtIndex:i] buyUrl] absoluteString] UTF8String], -1, SQLITE_TRANSIENT);

                sqlite3_bind_text(compiledStatement, 13, [[[events objectAtIndex:i] imageName] UTF8String], -1, SQLITE_TRANSIENT);

                if (sqlite3_step(compiledStatement) != SQLITE_DONE) {
                    hasError=1;
                    NSLog(@"Prepare-error %s", sqlite3_errmsg(concertsDB));
                }

                sqlite3_clear_bindings(compiledStatement);
            }
            sqlite3_reset(compiledStatement);
            if( hasError == 0 ) {
                sqlite3_exec(concertsDB, "COMMIT", 0, 0, 0);
            }
            else {
                sqlite3_exec(concertsDB, "ROLLBACK", 0, 0, 0);
            }

        }

        sqlite3_close(concertsDB);
    }

谁能告诉我可能出了什么问题？

【问题讨论】：

标签： iphone ios xcode cocoa-touch sqlite

【解决方案1】：

将对sqlite3_clear_bindings 的调用替换为对sqlite3_reset 的调用。然后将当前对sqlite3_reset 的调用替换为对sqlite3_finalize 的调用。

如果您需要再次重用该语句，则必须在调用sqlite3_step 之后调用sqlite3_reset。

sqlite3_finalize 必须在您完全完成语句后调用它。

不需要您对sqlite3_clear_bindings 的调用，因为您在每次循环迭代中设置了每个绑定变量。

【讨论】：