Trying to understand context indexes and contains-help

Question

Hi
i am using
Achieving functionality of many preferences using one context index
to understand context indexes and contains
and i get the following
Error starting at line 1 in command:
begin
ctx_ddl.create_preference ('nd_mcds', 'multi_column_datastore');
ctx_ddl.set_attribute ('nd_mcds', 'columns', 'text nd, text text');
ctx_ddl.create_section_group ('nd_sg', 'basic_section_group');
ctx_ddl.add_ndata_section ('nd_sg', 'nd', 'nd');
ctx_ddl.create_preference ('test_lex', 'basic_lexer');
ctx_ddl.set_attribute ('test_lex', 'whitespace', '/\|-_+');
end;
Error report:
ORA-06550: line 5, column 15:
PLS-00302: component 'ADD_NDATA_SECTION' must be declared
ORA-06550: line 5, column 7:
PL/SQL: Statement ignored
06550. 00000 - "line %s, column %s:\n%s"
*Cause:    Usually a PL/SQL compilation error.
*Action:
so i am using the following to check for the error
http://docs.oracle.com/cd/E18283_01/text.112/e16593/cddlpkg.htm#BABCBFCB
plus
oracle text application developer's guide
plus
oracle text reference
but these have not listed that error (i have even googled this in vain)
background::we were actually using catsearch but because of its downsides i want to implement this
Is Achieving functionality of many preferences using one context index a good place to start when one does not know about
context and contains??
please post any other useful link for contains and context index that even explains
1) fuzzy
2) stem
3) synonym
4) near
5) soundex
6)ndata
7)lexer
thanks in advance

Answer 1

Ndata is new to Oracle 11g. Your other posts indicate that you are using Oracle 10g, so you don't have ndata, so you get an error when you try to use it. If you want to use the 11g features that enable context indexes with contains to do all of the things that ctxcat indexes with catsearch do, then you need to upgrade to 11g.
The online documentation is searchable. Most things regarding Oracle Text are contained in either the Oracle Text Reference or the Oracle Text Application Developer's guide.
I suggest that you start with something very simple, then build from there.
The following is similar to your other post that used catsearch:
SCOTT@orcl_11gR2> CREATE TABLE mv_cat_seg_reg_prod
  2    (cat_ids       VARCHAR2 ( 7),
  3       act_status    VARCHAR2 (10),
  4       name           VARCHAR2 ( 1),
  5       email           VARCHAR2 ( 1),
  6       address1      VARCHAR2 ( 1),
  7       address2      VARCHAR2 ( 1),
  8       contact_name  VARCHAR2 ( 1),
  9       mobile           VARCHAR2 ( 1),
10       telephone     VARCHAR2 ( 1))
11  /
Table created.
SCOTT@orcl_11gR2> INSERT ALL
  2  INTO mv_cat_seg_reg_prod VALUES
  3    ('1', 'Y', 'A', 'B', 'C', 'D', 'E', 'F', 'G')
  4  INTO mv_cat_seg_reg_prod VALUES
  5    ('2', 'N', 'H', 'I', 'J', 'K', 'L', 'M', 'N')
  6  SELECT * FROM DUAL
  7  /
2 rows created.
SCOTT@orcl_11gR2> CREATE INDEX mv_cat_seg_reg_prod_idx
  2  ON mv_cat_seg_reg_prod (cat_ids)
  3  INDEXTYPE IS CTXSYS.CONTEXT
  4  /
Index created.
SCOTT@orcl_11gR2> SELECT token_text FROM dr$mv_cat_seg_reg_prod_idx$i
  2  /
TOKEN_TEXT
1
2
2 rows selected.
SCOTT@orcl_11gR2> SELECT *
  2  FROM   (SELECT SCORE (1), name, email, address1, address2, contact_name, mobile, telephone
  3            FROM   mv_cat_seg_reg_prod
  4            WHERE  CONTAINS (cat_ids, '1', 1) > 0
  5            AND    act_status = 'Y'
  6            ORDER  BY DBMS_RANDOM.VALUE)
  7  WHERE  ROWNUM < 8
  8  /
  SCORE(1) N E A A C M T
         4 A B C D E F G
1 row selected.