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Add a RESTART (without parameter) option to ALTER SEQUENCE, allowing a

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sequence to be reset to its original starting value.  This requires adding the
original start value to the set of parameters (columns) of a sequence object,
which is a user-visible change with potential compatibility implications;
it also forces initdb.

Also add hopefully-SQL-compatible RESTART/CONTINUE IDENTITY options to
TRUNCATE TABLE.  RESTART IDENTITY executes ALTER SEQUENCE RESTART for all
sequences "owned by" any of the truncated relations.  CONTINUE IDENTITY is
a no-op option.

Zoltan Boszormenyi
This commit is contained in:
Tom Lane
2008-05-16 23:36:05 +00:00
parent 8a2f5d221b
commit 10a3471bed
18 changed files with 513 additions and 106 deletions
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3
src/include/nodes/parsenodes.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.365 2008/05/09 23:32:04 tgl Exp $
* $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.366 2008/05/16 23:36:05 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1452,6 +1452,7 @@ typedef struct TruncateStmt
{
NodeTag type;
List *relations; /* relations (RangeVars) to be truncated */
bool restart_seqs; /* restart owned sequences? */
DropBehavior behavior; /* RESTRICT or CASCADE behavior */
} TruncateStmt;