Question

    String s1 = "create table testing " +
          "(id number NOT NULL PRIMARY KEY, " +
          "url varchar(1000) NOT NULL, " +
          "urlHash varchar(1000) NOT NULL, " +
          "contentHash varchar(1000), " +
          "modDate date, " +
          "contentLocation varchar(1000), " +
          "status integer, " +
          "lastCrawlDate date) ";
String s2 = "create sequence " +sequenceName+ " start with 1 increment by 1 nomaxvalue";

stmt=conn.createStatement();
stmt.executeUpdate(s1);
stmt.executeUpdate(s2);

以下合并声明有什么问题我总是得到错误

Missing IN or OUT parameter at index:: 8

我正在尝试将字符串日期时间转换为准备语句中的oracle sql中的Date dataType

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();

Answer 1

第一次TO_DATE调用中的日期格式不合适 - 您尝试在单引号字符串中使用单引号，因此最终未正确封闭。可能这会让解析器适合，导致一个不太明智的错误信息。

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：

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

您需要在SQL语句中嵌入格式'YYYY-MM-DD"T"HH24:MI:SS"Z"'。确保正确地转义双引号，这样它们就不会终止Java字符串。

Answer 2

这可能与您的问题无关，但我遇到了同样的错误，我在SQL的开头碰巧有两条注释行。我将它们移到了底部，错误就消失了。

在索引:: 8处缺少IN或OUT参数

2 个答案: