Question

我使用的是Oracle 11g。我正在尝试在CLOB字段上执行查找和替换功能（使用REPLACE）。

现在我的CLOB中的数据中包含CRLF，替换工作正常，直到我想找到一个包含CRLF的字符串。也许这最好用例子来解释：

So say the text in my field is:
----------------------------------
Hi there this is some text
that has CRLFS in it.
Some other text that
is there also.
Have a nice day

现在我要做的是替换所有这种情况，包括CRLF：

Search Text
--------------------------------------------------------------------------------
Some other text that
is there also.

使用此文本包含CRLF：

Replace Text
------------------------------------
Some other text that
has some new text that is there also.

所以可能会出现：

 ----------------------------------
 Hi there this is some text
 that has CRLFS in it.
 Some other text that
 has some new text that is there also.
 Have a nice day

现在我在存储过程中执行此操作，搜索文本和替换文本作为变量进入，但当我尝试说出％||之类的地方时ReplaceText || '％'返回0行。

有谁知道如何做到这一点？

这是我的存储过程（iOldResponsibilities是搜索文本，iNewResponsibilities是替换文本：

PROCEDURE FindReplaceResponsibilities (
    iOldResponsibilities    IN  JP_JOB_FAMILIES.RESPONSIBILITIES%TYPE,
    iNewResponsibilities    IN  JP_JOB_FAMILIES.RESPONSIBILITIES%TYPE,
    oNumRowsUpdated         OUT INTEGER
)
IS

  BEGIN
        oNumRowsUpdated := 0;


        SAVEPOINT sp_jf_findrepresp;

        -- If there is no old text to search for then, 
        -- append the new text to the end of every row.
        -- Else replace all occurrences of the old text with the new text
        IF iOldResponsibilities IS NULL THEN
          UPDATE JP_JOB_FAMILIES
            SET RESPONSIBILITIES = RESPONSIBILITIES || iNewResponsibilities;

          oNumRowsUpdated := SQL%ROWCOUNT;

        ELSE
          UPDATE JP_JOB_FAMILIES
            SET RESPONSIBILITIES = REPLACE(RESPONSIBILITIES, iOldResponsibilities, iNewResponsibilities)
          WHERE RESPONSIBILITIES like '%' || iOldResponsibilities || '%';

          -- I have also tried this:
          --WHERE dbms_lob.instr(RESPONSIBILITIES, TO_CLOB(iOldResponsibilities)) > 0; -- This is a LIKE for CLOBS

          oNumRowsUpdated := SQL%ROWCOUNT;

        END IF;

        RETURN;

        EXCEPTION

            WHEN OTHERS THEN
                BEGIN
                    oNumRowsUpdated := -1;
                    ROLLBACK TO sp_jf_findrepresp;
                    dbms_output.put_line('error: ' || sqlerrm);
                    RETURN;
                END;

END FindReplaceResponsibilities;

Text来自asp.net应用程序（c＃）作为String值：

 public int FindReplaceJobFamilyResponsibilities(String oldResponsibilities, String newResponsibilities, IDbTransaction transaction = null)
    {
        using (IDbCommand cmd = this._dataHelper.GetStoredProcedure(_connectionString,
            "JP_JOBFAM_PKG.FindReplaceResponsibilities", true))
        {
            _dataHelper.SetParameterValue(cmd, "iOldResponsibilities", oldResponsibilities);
            _dataHelper.SetParameterValue(cmd, "iNewResponsibilities", newResponsibilities);
            DataHelperBase.VerifyParameters(cmd.Parameters, false);
            base.SetExecuteConnection(cmd, transaction);
            _dataHelper.ExecuteNonQuery(cmd);

            return Convert.ToInt32(_dataHelper.GetParameterValue(cmd, "oNumRowsUpdated"));
        }
    }

Answer 1

原来是坏数据的情况。我的测试数据库中的数据已损坏，只有LF而不是CRLF。

GIGO： - ）

感谢您的帮助

哦，顺便说一句在我的代码示例中，我使用了INSTR函数而不是类似的函数。如果用户在文本中输入％来搜索，那可能搞砸了like语句。（无法过滤掉那些因为％可能是我数据中的有效字符）

以下是最终守则：

PROCEDURE FindReplaceResponsibilities (
iOldResponsibilities    IN  JP_JOB_FAMILIES.RESPONSIBILITIES%TYPE,
iNewResponsibilities    IN  JP_JOB_FAMILIES.RESPONSIBILITIES%TYPE,
oNumRowsUpdated         OUT INTEGER

） IS

BEGIN oNumRowsUpdated：= 0;

    SAVEPOINT sp_jf_findrepresp;

    -- If there is no old text to search for then, 
    -- append the new text to the end of every row.
    -- Else replace all occurrences of the old text with the new text
    IF iOldResponsibilities IS NULL THEN
      UPDATE JP_JOB_FAMILIES
        SET RESPONSIBILITIES = RESPONSIBILITIES || iNewResponsibilities;

      oNumRowsUpdated := SQL%ROWCOUNT;

    ELSE
      UPDATE JP_JOB_FAMILIES
        SET RESPONSIBILITIES = REPLACE(RESPONSIBILITIES, iOldResponsibilities, iNewResponsibilities)
      WHERE dbms_lob.instr(RESPONSIBILITIES, iOldResponsibilities) > 0; 

      oNumRowsUpdated := SQL%ROWCOUNT;

    END IF;

    RETURN;

    EXCEPTION

        WHEN OTHERS THEN
            BEGIN
                oNumRowsUpdated := -1;
                ROLLBACK TO sp_jf_findrepresp;
                dbms_output.put_line('error: ' || sqlerrm);
                RETURN;
            END;

END FindReplaceResponsibilities;

我的申请表中的代码很好：

public int FindReplaceJobFamilyResponsibilities(String oldResponsibilities, String newResponsibilities, IDbTransaction transaction = null)
{
    using (IDbCommand cmd = this._dataHelper.GetStoredProcedure(_connectionString,
        "JP_JOBFAM_PKG.FindReplaceResponsibilities", true))
    {
        _dataHelper.SetParameterValue(cmd, "iOldResponsibilities", oldResponsibilities);
        _dataHelper.SetParameterValue(cmd, "iNewResponsibilities", newResponsibilities);
        DataHelperBase.VerifyParameters(cmd.Parameters, false);
        base.SetExecuteConnection(cmd, transaction);
        _dataHelper.ExecuteNonQuery(cmd);

        return Convert.ToInt32(_dataHelper.GetParameterValue(cmd, "oNumRowsUpdated"));
    }
}

Oracle 11g - 使用回车符号行查找CLOB中的记录

1 个答案: