Oracle Text for Traditional Chinese
I would like to ask how can i specific keywords in Chinese and whenever i type sometimes in Chinese, the Oracle Text's token is indexed very interested and the stop word is definite not sometimes rational in Traditional Chinese. Anyone can help? (DR$xxx$I)
You can specify a stoplist in Chinese. Please refer to the documentation for more information about the CTX_DDL.CREATE_STOPLIST procedure and for the Chinese lexer.
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Hello,
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Check out note 280713.1. You can verify your install and install manually if necessary.
If you haven't done anything with the db (created schemas/objects) it might actually be easiest to simply delete the db and create a new one. Just make sure when you do that you select 'custom' from the list of templates and then choose Oracle Text as one of the options.
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Hi ...
can i use oracle Text for searching in varchar2 field ....
IF yes , plz give me the details ....
Thanks ....SELECT OD OID, TAB Layer, COLUM Field, TEX Result,
score(22) Score FROM VIEW_MASTER
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The search_terms are an inbound parameter. Not sure
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don't know what the score coming back means.
Sometimes I get 16, sometimes 12, sometimes 7.
I could use some help on this myself.Yes, 22 is just an alias. You can use any number here since it is just a label which is used to correlate the CONTAINS function with its corresponding SCORE function.
The details of how the score is computed are available in the Oracle Text Reference book, Appendix "F The Oracle Text Scoring Algorithm".
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When support traditional chinese language pack?
Best regards
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Hi all !
I have 30000 text documents stored in a table and I want to construct a "dictionnary" that contains all the terms include in those documents. I will use this dictionnary to classify my documents with the text mining solutions of Oracle.
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LaetitiaHi,
Check out a thesaurus (enter your phrases here) and see if it will do what you need:
http://download-west.oracle.com/docs/cd/B19306_01/text.102/b14217/cthes.htm#i1006324
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Is Oracle Text the right solution for this need of a specific search!
Hi ,
We are on Oracle 11.2.0.2 on Solaris 10. We have the need to be able to do search on data that are having diacritical marks and we should be able to do the serach ignoring this diacritical marks. That is the requirement. Now I got to hear that Oracle Text has a preference called BASIC_LEXER which can bypass the diacritical marks and so solely due to this feature I implemented Oracle Text and just for this diacritical search and no other need.
I mean I set up preference like this:
ctxsys.ctx_ddl.create_preference ('cust_lexer', 'BASIC_LEXER');
ctxsys.ctx_ddl.set_attribute ('cust_lexer', 'base_letter', 'YES'); -- removes diacritics
With this I set up like this:
CREATE TABLE TEXT_TEST
NAME VARCHAR2(255 BYTE)
--created Oracle Text index
CREATE INDEX TEXT_TEST_IDX1 ON TEXT_TEST
(NAME)
INDEXTYPE IS CTXSYS.CONTEXT
PARAMETERS('LEXER cust_lexer WORDLIST cust_wl SYNC (ON COMMIT)');
--sample data to illustrate the problem
Insert into TEXT_TEST
(NAME)
Values
('muller');
Insert into TEXT_TEST
(NAME)
Values
('müller');
Insert into TEXT_TEST
(NAME)
Values
('MULLER');
Insert into TEXT_TEST
(NAME)
Values
('MÜLLER');
Insert into TEXT_TEST
(NAME)
Values
('PAUL HERNANDEZ');
Insert into TEXT_TEST
(NAME)
Values
('CHRISTOPHER Phil');
COMMIT;
--Now there is an alternative solution that is there, instead of thee Oracle Text which is just a plain function given below (and it seems to work neat for my simple need of removing diacritical characters effect in search)
--I need to evaluate which is better given my specific needs -the function below or Oracle Text.
CREATE OR REPLACE FUNCTION remove_dia(p_value IN VARCHAR2, p_doUpper IN VARCHAR2 := 'Y')
RETURN VARCHAR2 DETERMINISTIC
IS
OUTPUT_STR VARCHAR2(4000);
begin
IF (p_doUpper = 'Y') THEN
OUTPUT_STR := UPPER(p_value);
ELSE
OUTPUT_STR := p_value;
END IF;
OUTPUT_STR := TRANSLATE(OUTPUT_STR,'ÀÁÂÃÄÅÇÈÉÊËÌÍÎÏÑÒÓÔÕÖØÙÚÛÜÝàáâãäåçèéêëìíîïñòóôõöøùúûüýÿ', 'AAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy');
RETURN (OUTPUT_STR);
end;
--now I query for which name stats with a P%:
--Below query gets me unexpected result of one row as I am using Oracle Text where each word is parsed for search using CONTAINS...
SQL> select * from text_test where contains(name,'P%')>0;
NAME
PAUL HERNANDEZ
CHRISTOPHER Phil
--Below query gets me the right and expected result of one row...
SQL> select * from text_test where name like 'P%';
NAME
PAUL HERNANDEZ
--Below query gets me the right and expected result of one row...
SQL> select * from text_test where remove_dia(name) like remove_dia('P%');
NAME
PAUL HERNANDEZMy entire need was only to be able to do a search that bypasses diacritical characters. To implement Oracle Text for that reason, I am wondering if that was the right choice! More so when I am now finding that the functionality of LIKE is not available in Oracle Text - the Oracle text search are based on tokens or words and they are different from output of the LIKE operator. So may be should I have just used a simple function like below and used that for my purpose instead of using Oracle Text:
This function (remove_dia) just removes the diacritical characters and may be for my need this is all that is needed. Can someone help to review that given my need I am better of not using Oracle Text? I need to continue using the functionality of Like operator and also need to bypass diacritical characters so the simple function that I have meets my need whereas Oracle Text causes a change in behaviour of search queries.
Thanks,
OrauserNIf all you need is LIKE functionality and you do not need any of the complex search capabilities of Oracle Text, then I would not use Oracle Text. I would create a function-based index on your name column that uses your function that removes the diacritical marks, so that your searches will be faster. Please see the demonstration below.
SCOTT@orcl_11gR2> CREATE TABLE TEXT_TEST
2 (NAME VARCHAR2(255 BYTE))
3 /
Table created.
SCOTT@orcl_11gR2> Insert all
2 into TEXT_TEST (NAME) Values ('muller')
3 into TEXT_TEST (NAME) Values ('müller')
4 into TEXT_TEST (NAME) Values ('MULLER')
5 into TEXT_TEST (NAME) Values ('MÜLLER')
6 into TEXT_TEST (NAME) Values ('PAUL HERNANDEZ')
7 into TEXT_TEST (NAME) Values ('CHRISTOPHER Phil')
8 select * from dual
9 /
6 rows created.
SCOTT@orcl_11gR2> CREATE OR REPLACE FUNCTION remove_dia
2 (p_value IN VARCHAR2,
3 p_doUpper IN VARCHAR2 := 'Y')
4 RETURN VARCHAR2 DETERMINISTIC
5 IS
6 OUTPUT_STR VARCHAR2(4000);
7 begin
8 IF (p_doUpper = 'Y') THEN
9 OUTPUT_STR := UPPER(p_value);
10 ELSE
11 OUTPUT_STR := p_value;
12 END IF;
13 RETURN
14 TRANSLATE
15 (OUTPUT_STR,
16 'ÀÁÂÃÄÅÇÈÉÊËÌÍÎÏÑÒÓÔÕÖØÙÚÛÜÝàáâãäåçèéêëìíîïñòóôõöøùúûüýÿ',
17 'AAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy');
18 end;
19 /
Function created.
SCOTT@orcl_11gR2> show errors
No errors.
SCOTT@orcl_11gR2> CREATE INDEX text_test_remove_dia_name
2 ON text_test (remove_dia (name))
3 /
Index created.
SCOTT@orcl_11gR2> set autotrace on explain
SCOTT@orcl_11gR2> select * from text_test
2 where remove_dia (name) like remove_dia ('mü%')
3 /
NAME
muller
müller
MULLER
MÜLLER
4 rows selected.
Execution Plan
Plan hash value: 3139591283
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 2131 | 2 (0)| 00:00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID| TEXT_TEST | 1 | 2131 | 2 (0)| 00:00:01 |
|* 2 | INDEX RANGE SCAN | TEXT_TEST_REMOVE_DIA_NAME | 1 | | 1 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - access("SCOTT"."REMOVE_DIA"("NAME") LIKE "REMOVE_DIA"('mü%'))
filter("SCOTT"."REMOVE_DIA"("NAME") LIKE "REMOVE_DIA"('mü%'))
Note
- dynamic sampling used for this statement (level=2)
SCOTT@orcl_11gR2> select * from text_test
2 where remove_dia (name) like remove_dia ('P%')
3 /
NAME
PAUL HERNANDEZ
1 row selected.
Execution Plan
Plan hash value: 3139591283
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 2131 | 2 (0)| 00:00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID| TEXT_TEST | 1 | 2131 | 2 (0)| 00:00:01 |
|* 2 | INDEX RANGE SCAN | TEXT_TEST_REMOVE_DIA_NAME | 1 | | 1 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - access("SCOTT"."REMOVE_DIA"("NAME") LIKE "REMOVE_DIA"('P%'))
filter("SCOTT"."REMOVE_DIA"("NAME") LIKE "REMOVE_DIA"('P%'))
Note
- dynamic sampling used for this statement (level=2)
SCOTT@orcl_11gR2> -
am working as a dba and we plan to introduce oracle text for text search. since I am new to this concept, I would like to know step by step implementation of Oracle text. I've searched some web sites but still not clear on the implementation part.
Please help me outHi,
Oracle Text is included in both standard and enterprise editions of the data server. When you are creating your database, select Oracle Text during configuration (one of the options). You will then have Oracle Text available on your database. The schema name is CTXSYS. You need to unlock this account just like any other.
To use Text, either grant permissions on the specific objects you need for the user, or use the CTXAPP role. It is up to you to know the permissions required for the objects (in other words, I can't tell you your requirements), so research this in the reference manual.
At this point, it is ready to use. Just create your indexes according to the Oracle Text Developer's Guide (you can find this with all of the documentation - look at the Application Developer's tab in Doc Library). Your search syntax depends totally on your requirements, and the type of index you choose to create. For example, the CONTEXT index uses the CONTAINS operator, and the CTXCAT index uses CATSEARCH (unless of course you want to use templates, but let's not go there just yet...).
There are two references you will want to review: The Oracle Text Developer's Guide and the Oracle Text Reference.
Hope this helps,
Ron -
Display problem when reading Traditional Chinese in Crystal Report 2008
Hi All,
I have tried to connect MS SQL 6.5 to build up a report. However, I encounter a problem when read Traditional Chinese. all chinese characters turn into adnormal characters. I wonder it is problem of SQL Server or some setting that I may not know. In addition, I can able to read chinese in the application program , ISQL / Query Analyzer. Please help to give idea and suggestion to fix this. Thanks
SQL Server: MS SQL Server 6.5
Client OS: Window XP ( Traditional Chinese Version)
Server OS: Window NT and Window Server 2000
StsyouHi
If you are using a Chinese language build database, Crystal Reports English build might not display the characters properly as non english databases include one byte characters as ASCII code character and double-byte characters as their own language code character.
Traditional Chinese, Simplified Chinese, Japanese (Kanji, Hiranga, and Katakana), Korean and Vietnamese use double-byte characters.
However, a possible workaround to this issue is to verify that the encoding on the database client is configured according to the examples below. Also, you will need to install the language pack in the English environment.
CONFIGURATION EXAMPLES:
Shift-JIS for a Japanese database
Big5 for a Traditional Chinese database
GB2312 for a Simplified Chinese database
iso-2022-kr for a Korean database
Windows 1258 for a Vietnamese database
EXAMPLE SCENARIO:
An Oracle database saves non-English language data such as Japanese.
The Windows operating system is English.
STEP TO CONFIGURE THE CHARACTER CODE IN THE ENVIRONMENT SETTING
(This step is based on the details of the EXAMPLE SCENARIO.)
1. Configure the system environment on the database client side to 'Shift-JIS' as the character code set in the Environment Setting.
This results in the NLS_LANG variable set to Japanese_Japan.JA16SJIS under the registry HKEY_Local_Machine\Software\Oracle\Homeo.
STEPS TO INSTALL LANGUAGE PACK IN AN ENGLISH ENVIRONMENT
(These steps are based on the details of the EXAMPLE SCENARIO.)
1. Add languages to the computer system by clicking:
Control Panel > Regional Options > General
2. Select the check box for 'Traditional Chinese', 'Simplified Chinese', 'Japanese', 'Korean' or 'Vietnamese'.
3. Click 'Apply'.
4. When you are prompted, insert the Windows CD-ROM to install the language pack.
5. Restart the computer.
Upon completing these steps, you are able to display the languages characters in the Crystal Reports Designer in a Windows English environment.
==========
NOTE:
If the database table and field names use non-English language characters, Data Explorer in CR will not correctly display these names. However, when you preview the report, the non-English data displays correctly.
==========
Configuring the database client according to the examples and installing the language pack will display the characters successfully. However, there are cases when this workaround does not resolve the issue.
For further information about CR and double-byte languages, refer to knowledge base articles, c2008083 and c2008349.
Hope this helps!!!
Regards
Sourashree -
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