Search notes:

Oracle: SYS.CON$

Constraints. 
create table con$                                        /* constraint table */
( owner#        number not null,                        /* owner user number */
  name          varchar2("M_IDEN") not null,              /* constraint name */
  con#          number not null,                        /* constraint number */
  spare1        number,         /* used for online add constraint. see kqd.h */
  spare2        number,
  spare3        number,
  spare4        varchar2(1000),
  spare5        varchar2(1000),
  spare6        date
)
/

See also

cdef$

Index

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