How to create partition index for Oracle text tables

CREATE TABLE emp (

  empno   NUMBER,

  ename   VARCHAR2(10 BYTE),

  job    VARCHAR2(20 BYTE),

  mgr    NUMBER,

  hiredate  DATE,

  sal    NUMBER,

  comm    NUMBER,

  deptno   NUMBER,

  text    CLOB

);

ALTER TABLE EMP MODIFY PARTITION BY RANGE (EMPNO) INTERVAL (10)(

PARTITION P1 VALUES LESS THAN (10),

PARTITION P2 VALUES LESS THAN (20),

PARTITION P3 VALUES LESS THAN (30));

CREATE INDEX IDX_TEXT ON EMP(TEXT) INDEXTYPE IS CTXSYS.CONTEXT LOCAL;

Error starting at line : 6 in command -

CREATE INDEX IDX_TEXT ON EMP(TEXT) INDEXTYPE IS CTXSYS.CONTEXT LOCAL

Error report -

ORA-29940: User-managed domain indexes are not allowed on interval-partitioned tables.

29940. 00000 - "User-managed domain indexes are not allowed on interval-partitioned tables."

*Cause:  An attempt was made to create a local user-managed domain index on