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Oracle
»
PL-SQL
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Context
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Full Text Searc
Using the Context cartridge
Managing Context is an arduous task. The best approach is to use the
command line utility as much as possible. Below is a code sample which creates
a policy (a policy is a construct which informs context which column on
what table to scan during a search operation). The next example illustrates how
to perform a search, and stored the result keys in a table.
/* create a policy, on the emp_resume table */
ctx_svc.clear_all_errors;
dbms_output.put_line('Creating Policy ...');
ctx_ddl.create_policy(
POLICY_NAME => 'EMP_RES_POLICY',
COLSPEC => 'EMP_RES.RESUME',
SOURCE_POLICY => 'CTXSYS.DEFAULT_POLICY',
DESCRIPTION => 'EMP Policy',
TEXTKEY => 'EMP_ID',
DSTORE_PREF => 'CTXSYS.DEFAULT_DIRECT_DATASTORE',
FILTER_PREF => 'CTXSYS.HTML_FILTER',
LEXER_PREF => 'CTXSYS.DEFAULT_LEXER'
);
dbms_output.put_line('Indexing Policy ...');
ctx_ddl.create_index('EMP_POLICY');
/* Run a Context query, place the result key values in a table */
/* first, this table needs to be created */
CREATE TABLE EMP_CTX_RESULTS(
TEXTKEY VARCHAR2(64),
TEXTKEY2 VARCHAR2(64),
SCORE NUMBER,
CONID NUMBER );
/* this code can go in a stored proc */
POLICY1 := 'EMP_POLICY';
TABLE1 := 'EMP_CTX_RESULTS';
ID1 := 100 ;
QUERY1 := 'COBOL|FORTRAN';
CTX_QUERY.CONTAINS(POLICY1, QUERY1, TABLE1, 1, ID1);
/* the table will contain records with a CONID of 100 */
/* ... you can use ampersand or pipe as the conditional */
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