Oracle DB 11.2.0.4 中SYS.ALL_CONSTRAINTS的定义 和 SYS.ALL_CONS_COLUMNS的定义

SYS.ALL_CONSTRAINTS的定义如下：

CREATE OR REPLACE VIEW ALL_CONSTRAINTS
(owner, constraint_name, constraint_type, table_name, search_condition, r_owner, r_constraint_name, delete_rule, status, deferrable, deferred, validated, generated, bad, rely, last_change, index_owner, index_name, invalid, view_related)
AS
select ou.name, oc.name,
       decode(c.type#, 1, 'C', 2, 'P', 3, 'U',
              4, 'R', 5, 'V', 6, 'O', 7,'C', 8, 'H', 9, 'F',
              10, 'F', 11, 'F', 13, 'F', '?'),
       o.name, c.condition, ru.name, rc.name,
       decode(c.type#, 4,
              decode(c.refact, 1, 'CASCADE', 2, 'SET NULL', 'NO ACTION'),
              NULL),
       decode(c.type#, 5, 'ENABLED',
              decode(c.enabled, NULL, 'DISABLED', 'ENABLED')),
       decode(bitand(c.defer, 1), 1, 'DEFERRABLE', 'NOT DEFERRABLE'),
       decode(bitand(c.defer, 2), 2, 'DEFERRED', 'IMMEDIATE'),
       decode(bitand(c.defer, 4), 4, 'VALIDATED', 'NOT VALIDATED'),
       decode(bitand(c.defer, 8), 8, 'GENERATED NAME', 'USER NAME'),
       decode(bitand(c.defer,16),16, 'BAD', null),
       decode(bitand(c.defer,32),32, 'RELY', null),
       c.mtime,
       decode(c.type#, 2, ui.name, 3, ui.name, null),
       decode(c.type#, 2, oi.name, 3, oi.name, null),
       decode(bitand(c.defer, 256), 256,
              decode(c.type#, 4,
                     case when (bitand(c.defer, 128) = 128
                                or o.status in (3, 5)
                                or ro.status in (3, 5)) then 'INVALID'
                          else null end,
                     case when (bitand(c.defer, 128) = 128
                                or o.status in (3, 5)) then 'INVALID'
                          else null end
                    ),
              null),
       decode(bitand(c.defer, 256), 256, 'DEPEND ON VIEW', null)
from sys.con$ oc, sys.con$ rc, sys."_BASE_USER" ou, sys."_BASE_USER" ru,
     sys."_CURRENT_EDITION_OBJ" ro, sys."_CURRENT_EDITION_OBJ" o, sys.cdef$ c,
     sys.obj$ oi, sys.user$ ui
where oc.owner# = ou.user#
  and oc.con# = c.con#
  and c.obj# = o.obj#
  and c.type# != 8
  and (c.type# < 14 or c.type# > 17)    /* don't include supplog cons   */
  and (c.type# != 12)                   /* don't include log group cons */
  and c.rcon# = rc.con#(+)
  and c.enabled = oi.obj#(+)
  and oi.owner# = ui.user#(+)
  and rc.owner# = ru.user#(+)
  and c.robj# = ro.obj#(+)
  and (o.owner# = userenv('SCHEMAID')
       or o.obj# in (select obj#
                     from sys.objauth$
                     where grantee# in ( select kzsrorol
                                         from x$kzsro
                                       )
                    )
        or /* user has system privileges */
          exists (select null from v$enabledprivs
                  where priv_number in (-45 /* LOCK ANY TABLE */,
                                        -47 /* SELECT ANY TABLE */,
                                        -48 /* INSERT ANY TABLE */,
                                        -49 /* UPDATE ANY TABLE */,
                                        -50 /* DELETE ANY TABLE */)
                  )
      )

SYS.ALL_CONS_COLUMNS的定义如下：

CREATE OR REPLACE VIEW ALL_CONS_COLUMNS
(owner, constraint_name, table_name, column_name, position)
AS
select u.name, c.name, o.name,
       decode(ac.name, null, col.name, ac.name), cc.pos#
from sys.user$ u, sys.con$ c, sys.col$ col, sys.ccol$ cc, sys.cdef$ cd,
     sys."_CURRENT_EDITION_OBJ" o, sys.attrcol$ ac
where c.owner# = u.user#
  and c.con# = cd.con#
  and (cd.type# < 14 or cd.type# > 17)   /* don't include supplog cons   */
  and (cd.type# != 12)                   /* don't include log group cons */
  and cd.con# = cc.con#
  and cc.obj# = col.obj#
  and cc.intcol# = col.intcol#
  and cc.obj# = o.obj#
  and (c.owner# = userenv('SCHEMAID')
       or cd.obj# in (select obj#
                      from sys.objauth$
                      where grantee# in ( select kzsrorol
                                         from x$kzsro
                                       )
                     )
        or /* user has system privileges */
          exists (select null from v$enabledprivs
                  where priv_number in (-45 /* LOCK ANY TABLE */,
                                        -47 /* SELECT ANY TABLE */,
                                        -48 /* INSERT ANY TABLE */,
                                        -49 /* UPDATE ANY TABLE */,
                                        -50 /* DELETE ANY TABLE */)
                  )
      )
  and col.obj# = ac.obj#(+)
  and col.intcol# = ac.intcol#(+)