iOS / sqlite -如何将准备好的sqlite3_stmt打印到NSLog

Question

我插入或替换到sqlite数据库的数据出现了一些意想不到的结果。为了解决这个问题，我尝试在下面的代码中获得准备好的sqlite3_stmt (语句)的完整打印。

我想做的事情是这样的，但我知道它不起作用：

if (sqlite3_step(statement) == SQLITE_DONE) {
            NSLog(@"%@", statement);

有什么办法可以做到这一点吗？

谢谢！！

sqlite3_stmt *statement;
const char *dbPath = [databasePath UTF8String];

if (true) {

    ListingsObject *temp = (ListingsObject *) DatabaseObject;

    if (sqlite3_open(dbPath, &conyDB) == SQLITE_OK) {

        const char *insertReplaceStmt = "INSERT OR REPLACE INTO listings (id, association_id, name, email, phone, toll_free_phone, fax, website, street, city, state, zipcode, county, bio, featured, hours, lat, lng, updated, status) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";

        if (sqlite3_prepare_v2(conyDB, insertReplaceStmt, -1, &statement, NULL) == SQLITE_OK) {
            sqlite3_bind_text(statement, 1, [temp._id UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 2, [temp.associationId UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 3, [temp.name UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 4, [temp.email UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 5, [temp.phone UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 6, [temp.tollFreePhone UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 7, [temp.fax UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 8, [temp.website UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 9, [temp.street UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 10, [temp.city UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 11, [temp.state UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 12, [temp.zipcode UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 13, [temp.county UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 14, [temp.bio UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 15, [temp.featured UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 16, [temp.hours UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 17, [temp.lat UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 18, [temp.lng UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 19, [temp.updated UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(statement, 20, [temp.status UTF8String], -1, SQLITE_TRANSIENT);

        }
        if (sqlite3_step(statement) == SQLITE_DONE) {
            NSLog(@"Insert or Replace to Listing Table successful Listing = %@", temp.name);

        }else {
            NSLog(@"Failed to add to Listing table Listing = %@", temp.name);
        }
        sqlite3_finalize(statement);
    }
 sqlite3_close(conyDB);

更新:我还没有找到这个问题的答案。但是我需要继续前进，所以我最终使用NSLog()构造了一个字符串；如下所示，对于我的每个表，我都必须检查：

NSLog(@"     INSERT OR REPLACE INTO listings (id, association_id, name, email, phone, toll_free_phone, fax, website, street, city, state, zipcode, county, bio, featured, hours, lat, lng, updated, status) VALUES (\"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\", \"%@\")", temp._id, temp.associationId, temp.name, temp.email, temp.phone, temp.tollFreePhone, temp.fax
                  , temp.website, temp.street, temp.city, temp.state, temp.zipcode, temp.county, temp.bio, temp.featured, temp.hours, temp.lat, temp.lng, temp.updated, temp.status);

Answer 1

我没有找到任何标准的方法，所以我创建了自己的方法：

-(NSMutableString*) sqlite3StmtToString:(sqlite3_stmt*) statement
{
    NSMutableString *s = [NSMutableString new];
    [s appendString:@"{\"statement\":["];
    for (int c = 0; c < sqlite3_column_count(statement); c++){
        [s appendFormat:@"{\"column\":\"%@\",\"value\":\"%@\"}",[NSString stringWithUTF8String:(char*)sqlite3_column_name(statement, c)],[NSString stringWithUTF8String:(char*)sqlite3_column_text(statement, c)]];
        if (c < sqlite3_column_count(statement) - 1)
            [s appendString:@","];
    }
    [s appendString:@"]}"];
    return s;
}

你可以这样称呼它：

NSLog(@"%@",[self sqlite3StmtToString:statement]);

观察:我在同一个类中这样做，因为我用self调用它，但您可以在任何类中这样做