XQuery and relational queries with the RAW data

So, I have a table like this setting:

CREATE TABLE book_frag
(
  book_id RAW(16),
  xpath_id INT,
  last_modified_ts TIMESTAMP,
  created_date TIMESTAMP,
  book_data XmlType,
  PRIMARY KEY(book_id, xpath_id),
  FOREIGN KEY (book_id) REFERENCES book(book_id),
  FOREIGN KEY (xpath_id) REFERENCES book_xpath(xpath_id)
);

CREATE TABLE book_xpath
(
  xpath_id INT,
  book_element_name VARCHAR2(32),
  PRIMARY KEY(xpath_id)
);

I am trying a query which will regroup the different XMLTypes book_frag into one. If I use this query, it works, but it is slow and sometimes times out:

SELECT 
    e.book_id,
    
    e.title_txt,
    e.subj_txt,
    
    e.target_mkt,
    e.target_lcl_mkt,
    
    e.catg,
    e.lang_code,
    e.out_of_stock_reas,
    
    e.sucsr_title,
    e.sucsr_sub_txt,
    
    e.orig_copy_ref,
    e.orig_subj_txt,
    
    XMLQuery(
    'declare namespace invtdata="http://www.mrbook.com/InventoryData";
    
     copy $invtData := $orig/invtdata:inventory
     
     modify
     (
       for $bkRow in fn:collection("oradb:/BOOKSCHEMA/BOOK_FRAG")
       let $bk := $mpfRow/ROW/BOOK_DATA/node()
       where xs:string($bkRow/ROW/ID)=$bookId
       return insert node $bk into $invtData
     ) return $invtData'
     PASSING XmlType('<inventory xmlns="http://www.mrbook.com/InventoryData" />') AS "orig",
     CAST(e.book_id AS VARCHAR2(64)) AS "bookId" RETURNING CONTENT
     ) AS invt_data
FROM
  entity e
WHERE e.title_txt = 'Finite Variable Analysis' OR e.subj_txt = 'Finite Mathematics';

However, if I try this, it works at all.

SELECT 
    e.book_id,
    
    e.title_txt,
    e.subj_txt,
    
    e.target_mkt,
    e.target_lcl_mkt,
    
    e.catg,
    e.lang_code,
    e.out_of_stock_reas,
    
    e.sucsr_title,
    e.sucsr_sub_txt,
    
    e.orig_copy_ref,
    e.orig_subj_txt,
    
    XMLQuery(
    'declare namespace invtdata="http://www.mrbook.com/InventoryData";
    
     copy $invtData := $orig/invtdata:inventory
     
     modify
     (
       for $bkRow in fn:collection("oradb:/BOOKSCHEMA/BOOK_FRAG")
       let $bk := $mpfRow/ROW/BOOK_DATA/node()
       where $bkRow/ROW/ID=$bookId
       return insert node $bk into $invtData
     ) return $invtData'
     PASSING XmlType('<inventory xmlns="http://www.mrbook.com/InventoryData" />') AS "orig",
     e.id AS "bookId" RETURNING CONTENT
     ) AS invt_data
FROM
  entity e
WHERE e.title_txt = 'Finite Variable Analysis' OR e.subj_txt = 'Finite Mathematics';

The error I get with this query is:

ORA-00932: inconsistent datatypes: expected - got BINARY
00932. 00000 -  "inconsistent datatypes: expected %s got %s"
*Cause:    
*Action:
Error at Line: 52 Column: 5

Is it possible to leave the XQuery to use the RAW data type (16) without casting?

KnightOfBlueArmor wrote:
Is it possible to leave the XQuery to use the RAW data type (16) without casting?

You are overloading the things, no need to XQuery Update in this case.
As far as I understand it, all you need is XMLAgg:

SELECT e.book_id
     , e.title_txt
     , e.subj_txt
     , XMLElement("inventory"
       , XMLAttributes('http://www.mrbook.com/InventoryData' as "xmlns")
       , XMLAgg( b.book_data )
       ) as inv_data
FROM entity e
     LEFT OUTER JOIN book_frag b
                  ON b.book_id = e.book_id
WHERE e.title_txt = 'Finite Variable Analysis'
   OR e.subj_txt = 'Finite Mathematics'
GROUP BY e.book_id
       , e.title_txt
       , e.subj_txt
;

(the OUTER JOIN may or may not be necessary, depending on the relationship between the two tables)

Published by: odie_63 on March 27, 2013 23:16

Tags: Database

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