Sql 索引处缺少IN或OUT参数：：8

下面的merge语句有什么问题？我总是得到错误信息

我试图在PrepareStation中将oracle sql中的字符串date time转换为日期数据类型

Missing IN or OUT parameter at index:: 8

---

第一次TO_date调用中的日期格式不好-您试图在单引号字符串中使用单引号，因此它最终没有被正确地括起来。这可能会使解析器适应，从而产生一条不太合理的错误消息

在Oracle日期格式中，文字位需要用双引号括起来，而不是单引号：

ps =  conn.prepareStatement(
"MERGE INTO testing " +
"USING (  SELECT ? AS url, " +      // We will maybe add this record
"                ? AS urlHash, " +
"                ? AS contentHash, "+
"        TO_DATE(?, 'YYYY-MM-DD'T'HH24:MI:SS'Z'') AS modDate, "+
"        ? AS contentLocation, "+
"        ? AS status, "+
"      TO_DATE(?, 'YYYY-MM-DD HH24:MI:SS') AS lastCrawlDate "+
"           FROM dual ) maybe "+
"   ON (maybe.urlHash = testing.urlHash) "+
"       WHEN MATCHED THEN "+
// We only need update the fields that might have changed
"       UPDATE SET testing.contentHash     = maybe.contentHash, "+
"                  testing.modDate         = maybe.modDate, "+
"                  testing.contentLocation = maybe.contentLocation, "+
"                  testing.status          = maybe.status, "+
"                  testing.lastCrawlDate   = maybe.lastCrawlDate "+
// But only if the new record is more recent
"        WHERE TO_CHAR(testing.modDate, 'YYYY-MM-DD'T'HH24:MI:SS'Z'') < TO_CHAR(maybe.modDate, ''YYYY-MM-DD'T'HH24:MI:SS'Z''') "+
"       WHEN NOT MATCHED THEN "+
// Insert new URL record
"   INSERT VALUES (test_seq.nextval, maybe.url, maybe.urlHash, maybe.contentHash, maybe.modDate, maybe.contentLocation, maybe.status, maybe.lastCrawlDate)");


    ps.setString (1, "http://www.computergeeks.com");
    ps.setString (2, "ahsasoiowiewie");
    ps.setString (3, "sgasjwhwueybdbfndf");
    ps.setString (4, "2011-07-28T23:54:14Z");
    ps.setString (5, "c://");
    ps.setLong (6, 0);
    ps.setString (7, "2010-09-24 23:34:14"); 
    ps.executeUpdate();
    ps.close();

---

您需要在SQL语句中嵌入格式“YYYY-MM-DDTHH24:MI:SSZ”。确保正确转义双引号，以免它们终止Java字符串

这可能与您的问题无关，但我遇到了相同的错误，我的SQL开头碰巧有两行注释。我将它们移到了底部，错误消失了。

我永远无法理解为什么人们不利用存储过程和函数，这是为了避免使用像这样愚蠢的代码！

ps =  conn.prepareStatement(
"MERGE INTO testing " +
"USING (  SELECT ? AS url, " +      // We will maybe add this record
"                ? AS urlHash, " +
"                ? AS contentHash, "+
"        TO_DATE(?, 'YYYY-MM-DD'T'HH24:MI:SS'Z'') AS modDate, "+
"        ? AS contentLocation, "+
"        ? AS status, "+
"      TO_DATE(?, 'YYYY-MM-DD HH24:MI:SS') AS lastCrawlDate "+
"           FROM dual ) maybe "+
"   ON (maybe.urlHash = testing.urlHash) "+
"       WHEN MATCHED THEN "+
// We only need update the fields that might have changed
"       UPDATE SET testing.contentHash     = maybe.contentHash, "+
"                  testing.modDate         = maybe.modDate, "+
"                  testing.contentLocation = maybe.contentLocation, "+
"                  testing.status          = maybe.status, "+
"                  testing.lastCrawlDate   = maybe.lastCrawlDate "+
// But only if the new record is more recent
"        WHERE TO_CHAR(testing.modDate, 'YYYY-MM-DD'T'HH24:MI:SS'Z'') < TO_CHAR(maybe.modDate, ''YYYY-MM-DD'T'HH24:MI:SS'Z''') "+
"       WHEN NOT MATCHED THEN "+
// Insert new URL record
"   INSERT VALUES (test_seq.nextval, maybe.url, maybe.urlHash, maybe.contentHash, maybe.modDate, maybe.contentLocation, maybe.status, maybe.lastCrawlDate)");


    ps.setString (1, "http://www.computergeeks.com");
    ps.setString (2, "ahsasoiowiewie");
    ps.setString (3, "sgasjwhwueybdbfndf");
    ps.setString (4, "2011-07-28T23:54:14Z");
    ps.setString (5, "c://");
    ps.setLong (6, 0);
    ps.setString (7, "2010-09-24 23:34:14"); 
    ps.executeUpdate();
    ps.close();

select TO_DATE('2011-07-28T23:54:14Z', 'YYYY-MM-DD"T"HH24:MI:SS"Z"') from dual;