從一個大的XML提取查詢失敗，字符串文字太長

Question

這個問題是參考我無法解析一個大的XML。 Question reference link

當xml的大小很大，目前它是250 kb解析失敗， 字符串文字太長。

請看以下解決方案：

Answer 1

解決方案：

1.

CREATE OR REPLACE FUNCTION APE9_BLOB_2_CLOB(L_BLOB BLOB) RETURN CLOB IS 
     L_CLOB   CLOB; 
     L_SRC_OFFSET  NUMBER; 
     L_DEST_OFFSET NUMBER; 
     L_BLOB_CSID  NUMBER := DBMS_LOB.DEFAULT_CSID; 
     V_LANG_CONTEXT NUMBER := DBMS_LOB.DEFAULT_LANG_CTX; 
     L_WARNING   NUMBER; 
     L_AMOUNT NUMBER; 
     BEGIN 
     DBMS_LOB.CREATETEMPORARY(L_CLOB, TRUE); 
     L_SRC_OFFSET  := 1; 
     L_DEST_OFFSET := 1; 
     L_AMOUNT := DBMS_LOB.GETLENGTH(L_BLOB); 
     DBMS_LOB.CONVERTTOCLOB(L_CLOB, 
           L_BLOB, 
           L_AMOUNT, 
           L_SRC_OFFSET, 
           L_DEST_OFFSET, 
           1, 
           V_LANG_CONTEXT, 
           L_WARNING); 
     RETURN L_CLOB; 
     END; 
    /

2.

SELECT XMLTYPE (APE9_BLOB_2_CLOB (XML_LOB)) PROFILE 
FROM APE1_XML_DISTRIB 
WHERE FILE_TYPE='Provider ID list' AND RELEASE_NAME='EPC_TO_PUB' 

3.

SELECT * FROM (
    WITH ET AS(
     SELECT 
       (SELECT XMLTYPE (APE9_BLOB_2_CLOB (XML_LOB)) PROFILE FROM APE1_XML_DISTRIB WHERE FILE_TYPE = 'Provider ID list' AND RELEASE_NAME='EPC_TO_PUB') AS XT 
      FROM DUAL 
      ) 
      SELECT  
       EXT.* 
       FROM 
       ET, 
       XMLTABLE(
       'for $SF in $GRP_2_ID/AuxiliaryType/AuxiliaryObject 
        for $SFItem in $SF/Row 
         return <row> 
         { 
         $SF 
         ,$SFItem 
         } 
         </row>'   
        PASSING ET.XT AS GRP_2_ID 
        COLUMNS 
        ID Number   PATH 'AuxiliaryObject/@id' , 
        PROVIDER_GROUP     VARCHAR2 (256)  PATH 'AuxiliaryObject/@name' , 
        Index_id Number PATH 'Row/Index',    
        PROVIDER_ID_DESC  VARCHAR2 (256)  PATH 'Row/Provider_ID_description', 
        PROVIDER_ID VARCHAR2 (64)  PATH 'Row/Provider_ID' 
        ) EXT 
        ) order by ID,Index_id