Gathering Schema Stats ORA-20000: Index "FA"."FA_RX_LOV_U1" or Partition of Such Index Is Unusable

Symptoms:

When running Gathering Schema Statistics

The following error is returned..

ORA-20000: index "FA"."FA_RX_LOV_U1" or partition of such index is in unusab

SQL> EXEC FND_STATS.gather_schema_statistics (schemaname=>'ALL', estimate_percent=>dbms_stats.auto_sample_size, options=>'GATHER AUTO');
BEGIN FND_STATS.gather_schema_statistics (schemaname=>'ALL', estimate_percent=>dbms_stats.auto_sample_size, options=>'GATHER AUTO'); END;

*
ERROR at line 1:
ORA-20000: index "FA"."FA_RX_LOV_U1" or partition of such index is in unusable
state
ORA-06512: at "SYS.DBMS_STATS", line 26211
ORA-06512: at line 1
ORA-06512: at "APPS.FND_STATS", line 711
ORA-06512: at "APPS.FND_STATS", line 1836
ORA-06512: at "APPS.FND_STATS", line 1183
ORA-06512: at "APPS.FND_STATS", line 1275
ORA-06512: at "APPS.FND_STATS", line 815
ORA-06512: at line 1

The issue can be reproduced with Running command to gather schema stats for "ALL"

Cause:

The index is unusable.

The following select statements confirm this:

SQL> select owner, index_name, status, last_analyzed from dba_indexes where index_name = 'FA_RX_LOV_U1';

SQL> select index_owner, index_name, status, last_analyzed from dba_ind_partitions where index_name = 'FA_RX_LOV_U1';


Results from 1st SQL above.


OWNER   INDEX_NAME          STATUS         LAST_ANALYZED
--------   --------------------  --------------  ------------------
 FA          FA_RX_LOV_U1     UNUSABLE


Rows from 2nd SQL above.

No rows returned.

Solution:

1) Rebuild the index using the following command.

SQL> alter index fa.FA_RX_LOV_U1 rebuild online;

2) Re-run the gathering of schema statistics

Reference metalink Doc ID 2013352.1