Oracle Text Index taking Much time for retreiving records

Question

Hi,
I an using the context based index on the table with the xmltype column and using the mentioned preferences, fuzzy, stemming and substring.
I m also using the INPATH and the HASPATH operators to search on the XML contents.
The total no of records in the table is 1,14,24,340.
When i execute the query on the table it is taking atleast 20 secs to return the results.
Could anyone suggest some method to improve the performance ?

Answer 1

Hi,
Please find belwo the details,
Table Structure - sample_t(id NUMBER, type VARCHAR2(10),smpl_xml XMLTYPE)
Preference:
begin
ctx_ddl.create_preference('SAMPLE_PREF', 'BASIC_WORDLIST');
ctx_ddl.set_attribute('SAMPLE_PREF','FUZZY_MATCH','ENGLISH');
ctx_ddl.set_attribute('SAMPLE_PREF','FUZZY_SCORE','0');
ctx_ddl.set_attribute('SAMPLE_PREF','FUZZY_NUMRESULTS','200');
ctx_ddl.set_attribute('SAMPLE_PREF','SUBSTRING_INDEX','TRUE');
end;
Index Creation:
CREATE INDEX sample_dmn_idx ON sample_t(smpl_xml)
INDEXTYPE IS CTXSYS.CONTEXT FILTER BY type PARAMETERS
('LEXER basic_lexer_pref
WORDLIST SAMPLE_PREF
SECTION GROUP CTXSYS.PATH_SECTION_GROUP');
Query :
select ts.id from sample_t ts
WHERE CONTAINS (ts.smpl_xml, 'HASPATH(/ROOT/VAL/chars/_7= "POWDERED FRUIT DRINKS")
AND HASPATH(/ROOT/VAL/chars/_46= "POUCH")
AND HASPATH(/ROOT/VAL/chars/_62= "LEMONADE")
AND HASPATH(/ROOT/VAL/chars/_88= "PIED")
AND HASPATH(/ROOT/VAL/chars/_732= "SWEET")
AND HASPATH(/ROOT/VAL/chars/_2971= "ALL FAMILY")
AND HASPATH(/ROOT/VAL/chars/_3115= "UNKNOWN")
AND HASPATH(/ROOT/VAL/chars/_3182= "YES")
AND HASPATH(/ROOT/VAL/chars/_3340= "OTHER")',1) > 0
AND ts.type = 'ITEM'
Query Data:_     
ID TYPE           smpl_xml
1      ITEM                <ROOT> <CODE>927</CODE> <VAL> <chars> <_7>AFTER SHAVE LOTIONS..</_7> <_27>OLD SPICE..</_27> <_46>REMAINING..</_46> <_4006>OLD SPICE..</_4006> </chars> </VAL> </ROOT>
Plan hash value: 1588539682
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 562K| 52M| 308K (1)| 01:01:43 |
|* 1 | TABLE ACCESS BY INDEX ROWID| sample_t               | 562K| 52M| 308K (1)| 01:01:43 |
|* 2 | DOMAIN INDEX | sample_dmn_idx     | | | 222K (0)| 00:44:34 |
Predicate Information (identified by operation id):
1 - filter("TS"."ENTY_TYP_MNM"='ITEM')
2 - access("CTXSYS"."CONTAINS"(SYS_MAKEXML(0,"SYS_NC00004$"),'HASPATH(/ROOT/VAL/chars/_7= "POWDERED FRUIT DRINKS") AND
HASPATH(/ROOT/VAL/chars/_46= "POUCH") AND
HASPATH(/ROOT/VAL/chars/_62= "LEMONADE") AND
HASPATH(/ROOT/VAL/chars/_88= "PIED") AND
HASPATH(/ROOT/VAL/chars/_732= "SWEET") AND
HASPATH(/ROOT/VAL/chars/_2971= "ALL FAMILY") AND
HASPATH(/ROOT/VAL/chars/_3115= "UNKNOWN") AND
HASPATH(/ROOT/VAL/chars/_3182= "YES") AND
HASPATH(/ROOT/VAL/chars/_3340= "OTHER")',1)>0)
Edited by: user13780543 on Aug 17, 2011 2:12 AM
Edited by: user13780543 on Aug 17, 2011 2:13 AM
Edited by: user13780543 on Aug 17, 2011 2:14 AM