Problem about advanced rewrite

Question

i build a advanced rewrite like:
begin
sys.dbms_advanced_rewrite.declare_rewrite_equivalence (
     name=> 'rewrite1',
     source_stmt =>
'select * from testfy where con like ''%c%''',
     destination_stmt =>
'select * from testfy where contains(con,''%c%'')>0',
     validate=> false,
     rewrite_mode=> 'text_match');
end;
but when i execute the query "select * from testfy where con like '%a%';"
DB gave me a error:
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Process ID: 5280
Session ID: 170 Serial number: 8
Why?
What should i do?

Answer 1

What db version are you using? Runs without error on 11.1.0.7 but still I think it does not return the expected results:
SQL> select * from v$version where rownum=1
BANNER                                                                         
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - Production         
1 row selected.
SQL> drop index emp_txt_idx
Index dropped.
SQL> create index emp_txt_idx
   on emp (ename)
   indextype is ctxsys.context
Index created.
SQL> begin
   sys.dbms_advanced_rewrite.declare_rewrite_equivalence (
      name               => 'rewrite1',
      source_stmt        => 'select ename from emp where ename like ''%L%''',
      destination_stmt   => 'select ename from emp where contains(ename, ''%K%'') > 0',
      validate           => false,
      rewrite_mode       => 'text_match'
end;
PL/SQL procedure successfully completed.
SQL> select ename from emp where ename like '%L%'
ENAME    
ALLEN    
BLAKE    
CLARK    
MILLER   
4 rows selected.