I have the following SQL statement.
select emp_no,dob,dept_no from v_depts where catsearch (emp_no,'abc',NULL) > 0 or catsearch (dept_no,'abc',NULL) > 0
where v_depts is a view.
Now I would like to add one or more tables as join so that I can do text search on columns e.g. employee_details contains employee information and I can join with emp_no
I have created index on employee_details table for emp_name column, however I am not able to join with v_depts to search because I modify my sql statement as
select a.emp_no,a.dob,a.dept_no from v_depts a left outer join employee_details b on (a.emp_no = b.emp_no) where catsearch (a.emp_no,'abc',NULL) > 0 or catsearch (a.dept_no,'abc',NULL) > 0 or catsearch (b.emp_name,'abc',NULL) > 0
it gives me error
ORA-20000: Oracle Text error: DRG-10849: catsearch does not support functional invocation DRG-10599: column is not indexed
even though I have created index for emp_name column in employee_details table. How can I solve this problem?
Index statement for emp_name
CREATE INDEX IDX_EMP_DETAILS ON EMPLOYEE_DETAILS(EMP_NAME)INDEXTYPE IS CTXSYS.CTXCAT
I usually solve fulltext searches on multiple columns on different tables by materializing a structured XML view of them and then creating the index on the whole XML.
This solution is generic and also give you freedom on search: the whole view or only a subpath. The drawback is managing the refresh of a MV who usually cannot be refreshed fast; but update of fulltext index usually isn't in real-time, too, so you can just schedulate it.
-- Crating the view CREATE MATERIALIZED VIEW fulltext_helper NOLOGGING BUILD DEFERRED REFRESH COMPLETE ON DEMAND AS SELECT a.dob, -- we don't need to fulltext on him XMLELEMENT(helper, XMLFOREST(a.emp_no AS emp_no, a.dept_no AS dept_no, b.emp_name AS emp_name) ) AS indexme FROM v_depts a LEFT OUTER JOIN employee_details b ON (a.emp_no = b.emp_no); -- Creating the index BEGIN ctx_ddl.create_preference('fulltext_helper_lexer', 'BASIC_LEXER'); ctx_ddl.create_preference('fulltext_helper_filter', 'NULL_FILTER'); END; / CREATE INDEX fulltext_helper_index ON fulltext_helper (indexme) INDEXTYPE IS CTXSYS.CONTEXT PARAMETERS ( 'DATASTORE CTXSYS.DIRECT_DATASTORE LEXER fulltext_helper_lexer FILTER fulltext_helper_filter'); -- Searching the whole data SELECT * FROM fulltext_helper WHERE contains(indexme, '{abc} INPATH (/helper)') > 0; -- Searching only on "empno" SELECT * FROM fulltext_helper WHERE contains(indexme, '{abc} INPATH (/helper/emp_no)') > 0;
