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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/backend/nodes/copyfuncs.c
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@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.393 2008/04/29 14:59:16 alvherre Exp $
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.394 2008/05/16 23:36:05 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -2156,6 +2156,7 @@ _copyTruncateStmt(TruncateStmt *from)
TruncateStmt *newnode = makeNode(TruncateStmt);
COPY_NODE_FIELD(relations);
COPY_SCALAR_FIELD(restart_seqs);
COPY_SCALAR_FIELD(behavior);
return newnode;