Tables of View Joined in Wrong Order When View Joined to Other Tables
I have the following view:
select
distinct
'PKG' item_type_code,
msibk.organization_id,
msibk.inventory_item_id
from
mtl_system_items_b_kfv msibk,
mtl_item_categories mic,
mtl_default_category_sets mdcs,
mtl_categories_b_kfv mcbk
where
msibk.organization_id = mic.organization_id
and msibk.inventory_item_id = mic.inventory_item_id
and mic.category_set_id = mdcs.category_set_id
--1 Inventory (Lookup = MTL_FUNCTIONAL_AREAS)
and mdcs.functional_area_id = 1
and mic.category_id = mcbk.category_id
and mcbk.segment1 = 'EXP'
and mcbk.segment2 in ( 'PACKAGING' )When I access the columns like this:
select
from
xxcus_mtl_sys_item_types_v
where
organization_id = :1
and inventory_item_id = :2
and item_type_code = :3It correctly accesses MTL_SYSTEM_ITEMS_B second in the explain plan and everything is good.
But when it is part of a join, it accesses MTL_SYSTEM_ITEMS_B last in the explain plan and has performance issues.
select
msi.segment1
from
xxcus_mtl_sys_item_types_v x,
mtl_system_items msi
where
msi.organization_id = x.organization_id
and msi.inventory_item_id = x.inventory_item_id
and x.item_type_code = 'PAK'Any ideas why the view tables are getting joined incorrectly when the view is joined with another table?
Thanks,
Kurz
The query I posted for the view is just an excerpt. It is several nearly identical queries with UNION ALL between them. I get the same results when I have only one query in the view.
Here is the explain plan for the first query:
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)|
| 0 | SELECT STATEMENT | | 5 | 160 | 25 (20)|
| 1 | VIEW | XXCUS_MTL_SYS_ITEM_TYPES_V | 5 | 160 | 25 (20)|
| 2 | UNION-ALL | | | | |
| 3 | SORT UNIQUE NOSORT | | 1 | 71 | 5 (20)|
|* 4 | FILTER | | | | |
| 5 | NESTED LOOPS | | 1 | 71 | 4 (0)|
| 6 | NESTED LOOPS | | 1 | 36 | 3 (0)|
| 7 | NESTED LOOPS | | 1 | 17 | 1 (0)|
| 8 | TABLE ACCESS BY INDEX ROWID| MTL_DEFAULT_CATEGORY_SETS | 1 | 8 | 1 (0)|
|* 9 | INDEX UNIQUE SCAN | MTL_DEFAULT_CATEGORY_SETS_U1 | 1 | | 0 (0)|
|* 10 | INDEX UNIQUE SCAN | MTL_SYSTEM_ITEMS_B_U1 | 1 | 9 | 0 (0)|
|* 11 | INDEX RANGE SCAN | MTL_ITEM_CATEGORIES_U1 | 1 | 19 | 2 (0)|
|* 12 | TABLE ACCESS BY INDEX ROWID | MTL_CATEGORIES_B | 1 | 35 | 1 (0)|
|* 13 | INDEX UNIQUE SCAN | MTL_CATEGORIES_B_U1 | 1 | | 0 (0)|
| 14 | SORT UNIQUE NOSORT | | 1 | 63 | 5 (20)|
|* 15 | FILTER | | | | |
| 16 | NESTED LOOPS | | 1 | 63 | 4 (0)|
| 17 | NESTED LOOPS | | 1 | 36 | 3 (0)|
| 18 | NESTED LOOPS | | 1 | 17 | 1 (0)|
| 19 | TABLE ACCESS BY INDEX ROWID| MTL_DEFAULT_CATEGORY_SETS | 1 | 8 | 1 (0)|
|* 20 | INDEX UNIQUE SCAN | MTL_DEFAULT_CATEGORY_SETS_U1 | 1 | | 0 (0)|
|* 21 | INDEX UNIQUE SCAN | MTL_SYSTEM_ITEMS_B_U1 | 1 | 9 | 0 (0)|
|* 22 | INDEX RANGE SCAN | MTL_ITEM_CATEGORIES_U1 | 1 | 19 | 2 (0)|
|* 23 | TABLE ACCESS BY INDEX ROWID | MTL_CATEGORIES_B | 1 | 27 | 1 (0)|
|* 24 | INDEX UNIQUE SCAN | MTL_CATEGORIES_B_U1 | 1 | | 0 (0)|
| 25 | SORT UNIQUE NOSORT | | 1 | 71 | 5 (20)|
|* 26 | FILTER | | | | |
| 27 | NESTED LOOPS | | 1 | 71 | 4 (0)|
| 28 | NESTED LOOPS | | 1 | 36 | 3 (0)|
| 29 | NESTED LOOPS | | 1 | 17 | 1 (0)|
| 30 | TABLE ACCESS BY INDEX ROWID| MTL_DEFAULT_CATEGORY_SETS | 1 | 8 | 1 (0)|
|* 31 | INDEX UNIQUE SCAN | MTL_DEFAULT_CATEGORY_SETS_U1 | 1 | | 0 (0)|
|* 32 | INDEX UNIQUE SCAN | MTL_SYSTEM_ITEMS_B_U1 | 1 | 9 | 0 (0)|
|* 33 | INDEX RANGE SCAN | MTL_ITEM_CATEGORIES_U1 | 1 | 19 | 2 (0)|
|* 34 | TABLE ACCESS BY INDEX ROWID | MTL_CATEGORIES_B | 1 | 35 | 1 (0)|
|* 35 | INDEX UNIQUE SCAN | MTL_CATEGORIES_B_U1 | 1 | | 0 (0)|
| 36 | SORT UNIQUE NOSORT | | 1 | 71 | 5 (20)|
|* 37 | FILTER | | | | |
| 38 | NESTED LOOPS | | 1 | 71 | 4 (0)|
| 39 | NESTED LOOPS | | 1 | 36 | 3 (0)|
| 40 | NESTED LOOPS | | 1 | 17 | 1 (0)|
| 41 | TABLE ACCESS BY INDEX ROWID| MTL_DEFAULT_CATEGORY_SETS | 1 | 8 | 1 (0)|
|* 42 | INDEX UNIQUE SCAN | MTL_DEFAULT_CATEGORY_SETS_U1 | 1 | | 0 (0)|
|* 43 | INDEX UNIQUE SCAN | MTL_SYSTEM_ITEMS_B_U1 | 1 | 9 | 0 (0)|
|* 44 | INDEX RANGE SCAN | MTL_ITEM_CATEGORIES_U1 | 1 | 19 | 2 (0)|
|* 45 | TABLE ACCESS BY INDEX ROWID | MTL_CATEGORIES_B | 1 | 35 | 1 (0)|
|* 46 | INDEX UNIQUE SCAN | MTL_CATEGORIES_B_U1 | 1 | | 0 (0)|
| 47 | SORT UNIQUE NOSORT | | 1 | 71 | 5 (20)|
|* 48 | FILTER | | | | |
| 49 | NESTED LOOPS | | 1 | 71 | 4 (0)|
| 50 | NESTED LOOPS | | 1 | 36 | 3 (0)|
| 51 | NESTED LOOPS | | 1 | 17 | 1 (0)|
| 52 | TABLE ACCESS BY INDEX ROWID| MTL_DEFAULT_CATEGORY_SETS | 1 | 8 | 1 (0)|
|* 53 | INDEX UNIQUE SCAN | MTL_DEFAULT_CATEGORY_SETS_U1 | 1 | | 0 (0)|
|* 54 | INDEX UNIQUE SCAN | MTL_SYSTEM_ITEMS_B_U1 | 1 | 9 | 0 (0)|
|* 55 | INDEX RANGE SCAN | MTL_ITEM_CATEGORIES_U1 | 1 | 19 | 2 (0)|
|* 56 | TABLE ACCESS BY INDEX ROWID | MTL_CATEGORIES_B | 1 | 35 | 1 (0)|
|* 57 | INDEX UNIQUE SCAN | MTL_CATEGORIES_B_U1 | 1 | | 0 (0)|
--------------------------------------------------------------------------------------------------------Here is the explain plan for the second query:
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)|
| 0 | SELECT STATEMENT | | 5 | 240 | 10 (50)|
| 1 | NESTED LOOPS | | 5 | 240 | 10 (50)|
| 2 | VIEW | XXCUS_MTL_SYS_ITEM_TYPES_V | 5 | 160 | 5 (100)|
| 3 | UNION-ALL | | | | |
| 4 | HASH UNIQUE | | 1 | 71 | 1 (100)|
|* 5 | FILTER | | | | |
| 6 | NESTED LOOPS | | 17 | 1207 | 77 (0)|
| 7 | NESTED LOOPS | | 16 | 992 | 77 (0)|
| 8 | NESTED LOOPS | | 1 | 43 | 7 (0)|
| 9 | TABLE ACCESS BY INDEX ROWID| MTL_DEFAULT_CATEGORY_SETS | 1 | 8 | 1 (0)|
|* 10 | INDEX UNIQUE SCAN | MTL_DEFAULT_CATEGORY_SETS_U1 | 1 | | 0 (0)|
|* 11 | TABLE ACCESS BY INDEX ROWID| MTL_CATEGORIES_B | 1 | 35 | 6 (0)|
|* 12 | INDEX RANGE SCAN | MTL_CATEGORIES_B_N1 | 44 | | 2 (0)|
|* 13 | TABLE ACCESS BY INDEX ROWID | MTL_ITEM_CATEGORIES | 49 | 931 | 70 (0)|
|* 14 | INDEX RANGE SCAN | MTL_ITEM_CATEGORIES_N3 | 441 | | 4 (0)|
|* 15 | INDEX UNIQUE SCAN | MTL_SYSTEM_ITEMS_B_U1 | 1 | 9 | 0 (0)|
| 16 | HASH UNIQUE | | 1 | 63 | 1 (100)|
|* 17 | FILTER | | | | |
| 18 | NESTED LOOPS | | 2158 | 132K| 250 (1)|
| 19 | NESTED LOOPS | | 2134 | 112K| 249 (0)|
| 20 | NESTED LOOPS | | 44 | 1540 | 7 (0)|
| 21 | TABLE ACCESS BY INDEX ROWID| MTL_DEFAULT_CATEGORY_SETS | 1 | 8 | 1 (0)|
|* 22 | INDEX UNIQUE SCAN | MTL_DEFAULT_CATEGORY_SETS_U1 | 1 | | 0 (0)|
| 23 | TABLE ACCESS BY INDEX ROWID| MTL_CATEGORIES_B | 44 | 1188 | 6 (0)|
|* 24 | INDEX RANGE SCAN | MTL_CATEGORIES_B_N1 | 44 | | 2 (0)|
|* 25 | TABLE ACCESS BY INDEX ROWID | MTL_ITEM_CATEGORIES | 49 | 931 | 70 (0)|
|* 26 | INDEX RANGE SCAN | MTL_ITEM_CATEGORIES_N3 | 441 | | 4 (0)|
|* 27 | INDEX UNIQUE SCAN | MTL_SYSTEM_ITEMS_B_U1 | 1 | 9 | 0 (0)|
| 28 | HASH UNIQUE | | 1 | 71 | 1 (100)|
|* 29 | FILTER | | | | |
| 30 | NESTED LOOPS | | 33 | 2343 | 77 (0)|
| 31 | NESTED LOOPS | | 33 | 2046 | 77 (0)|
| 32 | NESTED LOOPS | | 1 | 43 | 7 (0)|
| 33 | TABLE ACCESS BY INDEX ROWID| MTL_DEFAULT_CATEGORY_SETS | 1 | 8 | 1 (0)|
|* 34 | INDEX UNIQUE SCAN | MTL_DEFAULT_CATEGORY_SETS_U1 | 1 | | 0 (0)|
|* 35 | TABLE ACCESS BY INDEX ROWID| MTL_CATEGORIES_B | 1 | 35 | 6 (0)|
|* 36 | INDEX RANGE SCAN | MTL_CATEGORIES_B_N1 | 44 | | 2 (0)|
|* 37 | TABLE ACCESS BY INDEX ROWID | MTL_ITEM_CATEGORIES | 49 | 931 | 70 (0)|
|* 38 | INDEX RANGE SCAN | MTL_ITEM_CATEGORIES_N3 | 441 | | 4 (0)|
|* 39 | INDEX UNIQUE SCAN | MTL_SYSTEM_ITEMS_B_U1 | 1 | 9 | 0 (0)|
| 40 | HASH UNIQUE | | 1 | 71 | 1 (100)|
|* 41 | FILTER | | | | |
| 42 | NESTED LOOPS | | 17 | 1207 | 77 (0)|
| 43 | NESTED LOOPS | | 16 | 992 | 77 (0)|
| 44 | NESTED LOOPS | | 1 | 43 | 7 (0)|
| 45 | TABLE ACCESS BY INDEX ROWID| MTL_DEFAULT_CATEGORY_SETS | 1 | 8 | 1 (0)|
|* 46 | INDEX UNIQUE SCAN | MTL_DEFAULT_CATEGORY_SETS_U1 | 1 | | 0 (0)|
|* 47 | TABLE ACCESS BY INDEX ROWID| MTL_CATEGORIES_B | 1 | 35 | 6 (0)|
|* 48 | INDEX RANGE SCAN | MTL_CATEGORIES_B_N1 | 44 | | 2 (0)|
|* 49 | TABLE ACCESS BY INDEX ROWID | MTL_ITEM_CATEGORIES | 49 | 931 | 70 (0)|
|* 50 | INDEX RANGE SCAN | MTL_ITEM_CATEGORIES_N3 | 441 | | 4 (0)|
|* 51 | INDEX UNIQUE SCAN | MTL_SYSTEM_ITEMS_B_U1 | 1 | 9 | 0 (0)|
| 52 | HASH UNIQUE | | 1 | 71 | 1 (100)|
|* 53 | FILTER | | | | |
| 54 | NESTED LOOPS | | 17 | 1207 | 77 (0)|
| 55 | NESTED LOOPS | | 16 | 992 | 77 (0)|
| 56 | NESTED LOOPS | | 1 | 43 | 7 (0)|
| 57 | TABLE ACCESS BY INDEX ROWID| MTL_DEFAULT_CATEGORY_SETS | 1 | 8 | 1 (0)|
|* 58 | INDEX UNIQUE SCAN | MTL_DEFAULT_CATEGORY_SETS_U1 | 1 | | 0 (0)|
|* 59 | TABLE ACCESS BY INDEX ROWID| MTL_CATEGORIES_B | 1 | 35 | 6 (0)|
|* 60 | INDEX RANGE SCAN | MTL_CATEGORIES_B_N1 | 44 | | 2 (0)|
|* 61 | TABLE ACCESS BY INDEX ROWID | MTL_ITEM_CATEGORIES | 49 | 931 | 70 (0)|
|* 62 | INDEX RANGE SCAN | MTL_ITEM_CATEGORIES_N3 | 441 | | 4 (0)|
|* 63 | INDEX UNIQUE SCAN | MTL_SYSTEM_ITEMS_B_U1 | 1 | 9 | 0 (0)|
| 64 | TABLE ACCESS BY INDEX ROWID | MTL_SYSTEM_ITEMS_B | 1 | 16 | 1 (0)|
|* 65 | INDEX UNIQUE SCAN | MTL_SYSTEM_ITEMS_B_U1 | 1 | | 0 (0)|
---------------------------------------------------------------------------------------------------------
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Sean
p.s. previously I had not been escaping the ampersand. This meant that I lost my ampersand in fetching attributes, AND the attribute order was ALSO WRONG!
In fact, the wrong order was what led me to read about how to correctly encode ampersand at all. I had been hoping that correctly encoding would fix the order problem, but it didn't.
Edited by: svaens on Mar 31, 2008 6:21 AMHi kdgregory ,
Firstly, sorry if there has been a misunderstanding on my part. If i did not reply to the question you raised, I appologise.
In this 'reply' I hope not to risk further misunderstanding, and have simply given the most basic example which will cause the problem I am talking about, as well as short instructions on what XML to remove to make the problem disappear.
Secondly, as this page seems to be displayed in ISO 8859-1, this is the reason the xml I have posted looks garbled. The xml is UTF-8. I have provided a link to the example xml file for the sample below
[example xml file UTF-8|http://sean.freeshell.org/java/less2.xml]
As for your most recent questions:
Is it specified as an entity? To my knowledge (so far as my understanding of what an entity is) , yes, I am including entities in my xml. In my below example, the entities are the code for the greater than symbol. I am under the understanding that this is allowed in XML ??
Is it an actual literal character (0xA0)? No, I am specifying 'greater than' entity (code?) in order to include the actual symbol in the end result. I am encoding it in form 'ampersand', 'g character', 't character', 'colon' in order for it to work, according to information I have read on various web pages. A quick google search will show you where I got such information from, example website: https://studio.tellme.com/general/xmlprimer.html
Here is my sample program. It is longer than the one you kindly provided only because it prints out all attributes of the element it looks for. To use it, only change the name of the file it loads.
I have given the xml code seperately so it can be easily copied and saved to file.
Results you can expect from running this small test example?
1. a mixed up list of attributes where attribute node name no longer matches its assigned attribute values (not for all attributes, but some).
2. removing the attribute bg from the 'text' element will reduce most of these symptoms, but not all. Removing another attribute from the element will most likely make the end result look normal again.
3. No exception is thrown by the presence of non xml characters.
IMPORTANT!!! I have only just (unfortunately) noticed what this page does to my unicode characters... all the the international characters get turned into funny codes when previewed and viewed on this page.
Whereas the only codes I am explicitly including in this XML is the greater than symbol. The rest were international characters.
Perhaps that is the problem?
Perhaps there is an international characters problem?
I am quite sure that these characters are all UTF-8 because when I open up this xml file in firefox, It displays correctly, and in checking the character encoding, firefox reports UTF-8.
In order to provide an un-garbled xml file, I will provide it at this link:
link to xml file: [http://sean.freeshell.org/java/less2.xml]
Again, sorry for any hassle and/or delay with my reply, or poor reply. I did not mean to waste anyones time.
It will be appreciated however if an answer can be found for this problem. Chiefly,
1. Is this a bug?
2. Is the XML correct? (if not, then all those websites i've been reading are giving false information? )
Kindest Regards,
Sean
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
public class Example
public static void main(String[] argv)
try
FileInputStream fis = new FileInputStream("/home/sean/Desktop/chris/less2.xml");
Document doc = DocumentBuilderFactory.newInstance()
.newDocumentBuilder()
.parse(new InputSource(fis));
Element root = doc.getDocumentElement();
NodeList textnodes = root.getElementsByTagName("text");
int len = textnodes.getLength();
int index = 0;
int attindex = 0;
int attrlen = 0;
NamedNodeMap attrs = null;
while (index<len)
Element te = (Element)textnodes.item(index);
attrs = te.getAttributes();
attrlen = attrs.getLength();
attindex = 0;
Node node = null;
while (attindex<attrlen)
node = attrs.item(attindex);
System.out.println("attr: "+node.getNodeName()+ " is shown holding value: " + node.getNodeValue());
attindex++;
index++;
System.out.println("-------------");
fis.close();
catch(Exception e)
System.out.println("we've had an exception, type "+ e);
} [example xml file|http://sean.freeshell.org/java/less2.xml]
FOR THE XML, Please see link above, as it is UTF-8, and this page is not. Edited by: svaens on Apr 7, 2008 7:03 AM
Edited by: svaens on Apr 7, 2008 7:23 AM
Edited by: svaens on Apr 7, 2008 7:37 AM
Edited by: svaens on Apr 7, 2008 7:41 AM -
Problem in Spras field for join condition in creating new views
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I want to create a new view for three tables t1 t2 and t3 say.....i want to join this three tables like
table field table field
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want to create a new view for three tables t1 t2 and t3 say.....i want to join this three tables like
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