ORA-31004
        Length string of the BLOB in XDB$H_INDEX is below the minimum (string).
        
        
        Cause
        The calculated size of the BLOB in the CHILDREN column of the XDB$H_INDEX table was less than the required minimum without being chained.
        Action
        Set the value of the DB_BLOCK_SIZE initialization parameter to at least 2000. For XDB to run at its fastest, set DB_BLOCK_SIZE to 8000.
        
     
    
    
        ORA-31004
        Length string of the BLOB in XDB$H_INDEX is below the minimum string
        
        
        Cause
        In the XDB$H_INDEX table, the CHILDREN column, a BLOB, must have a certain minimum length without being chained. The calculated length of the LOB was less than the stated minimum.
        Action
        Set the value of the init.ora parameter db_block_size to at least 2K.  For XDB to run at its fastest, set db_block_size to 8K.
        
     
    
    
        ORA-31004
        Length string of the BLOB in XDB$H_INDEX is below the minimum string
        
        
        Cause
        In the XDB$H_INDEX table, the CHILDREN column, a BLOB, must have a certain minimum length without being chained. The calculated length of the LOB was less than the stated minimum.
        Action
        Set the value of the init.ora parameter db_block_size to at least 2K.  For XDB to run at its fastest, set db_block_size to 8K.