alter_sequence man page on UnixWare

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       ALTER SEQUENCE - change the definition of a sequence generator

       ALTER SEQUENCE name [ INCREMENT [ BY ] increment ]
	   [ MINVALUE minvalue | NO MINVALUE ] [ MAXVALUE maxvalue | NO MAXVALUE ]
	   [ RESTART [ WITH ] start ] [ CACHE cache ] [ [ NO ] CYCLE ]
	   [ OWNED BY { table.column | NONE } ]
       ALTER SEQUENCE name SET SCHEMA new_schema

       ALTER  SEQUENCE	changes the parameters of an existing sequence genera‐
       tor. Any parameters not specifically set in the ALTER SEQUENCE  command
       retain their prior settings.

       You  must  own  the  sequence  to  use  ALTER  SEQUENCE.	  To  change a
       sequence's schema, you must also	 have  CREATE  privilege  on  the  new

       name   The  name	 (optionally  schema-qualified)	 of  a	sequence to be

	      The clause INCREMENT BY increment is optional. A positive	 value
	      will  make  an  ascending	 sequence, a negative one a descending
	      sequence. If unspecified, the old increment value will be	 main‐


	      The  optional  clause  MINVALUE  minvalue determines the minimum
	      value a sequence can generate. If NO MINVALUE is specified,  the
	      defaults of 1 and -263-1 for ascending and descending sequences,
	      respectively, will be used. If neither option is specified,  the
	      current minimum value will be maintained.


	      The  optional  clause  MAXVALUE  maxvalue determines the maximum
	      value for	 the  sequence.	 If  NO	 MAXVALUE  is  specified,  the
	      defaults	 are   263-1  and  -1  for  ascending  and  descending
	      sequences, respectively, will be	used.  If  neither  option  is
	      specified, the current maximum value will be maintained.

       start  The optional clause RESTART WITH start changes the current value
	      of the sequence.

       cache  The clause CACHE cache enables sequence numbers to  be  preallo‐
	      cated  and stored in memory for faster access. The minimum value
	      is 1 (only one value can	be  generated  at  a  time,  i.e.,  no
	      cache). If unspecified, the old cache value will be maintained.

       CYCLE  The  optional  CYCLE key word may be used to enable the sequence
	      to wrap around when the maxvalue or minvalue has been reached by
	      an  ascending  or descending sequence respectively. If the limit
	      is reached, the next number generated will be  the  minvalue  or
	      maxvalue, respectively.

       NO CYCLE
	      If  the  optional	 NO  CYCLE key word is specified, any calls to
	      nextval after the sequence has reached its  maximum  value  will
	      return  an  error.   If neither CYCLE or NO CYCLE are specified,
	      the old cycle behavior will be maintained.

       OWNED BY table.column

	      The OWNED BY option causes the sequence to be associated with  a
	      specific	table  column,	such that if that column (or its whole
	      table) is dropped, the sequence will be automatically dropped as
	      well.  If	 specified,  this  association replaces any previously
	      specified association for the sequence. The specified table must
	      have  the	 same owner and be in the same schema as the sequence.
	      Specifying OWNED BY NONE removes any existing association,  mak‐
	      ing the sequence ``free-standing''.

	      The new schema for the sequence.

       Restart a sequence called serial, at 105:


       To  avoid  blocking of concurrent transactions that obtain numbers from
       the same sequence, ALTER SEQUENCE's effects on the sequence  generation
       parameters are never rolled back; those changes take effect immediately
       and are not reversible. However, the OWNED BY and  SET  SCHEMA  clauses
       are ordinary catalog updates and can be rolled back.

       ALTER SEQUENCE will not immediately affect nextval results in backends,
       other than the current one, that have  preallocated  (cached)  sequence
       values.	They  will  use	 up  all  cached  values prior to noticing the
       changed sequence generation parameters. The  current  backend  will  be
       affected immediately.

       Some  variants  of  ALTER TABLE can be used with sequences as well; for
       example, to rename a sequence use ALTER TABLE RENAME.

       ALTER SEQUENCE conforms to the SQL standard, except for	the  OWNED  BY
       and SET SCHEMA clauses, which are PostgreSQL extensions.

       CREATE SEQUENCE [create_sequence(5)], DROP SEQUENCE [drop_sequence(l)]

SQL - Language Statements	  2008-01-03		      ALTER SEQUENCE()
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