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ALTER SEQUENCE RESTART did the wrong thing if sequence last_value was 

equal to the desired restart value (must clear is_called, did not).
Per bug report #1127 from Piotr Konieczny.
This commit is contained in:
Tom Lane 2004-04-06 16:39:30 +00:00
parent 055b0d27f6
commit 2098ec6e37
1 changed files with 12 additions and 21 deletions
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33
src/backend/commands/sequence.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/sequence.c,v 1.108 2004/01/10 23:28:44 neilc Exp $
* $PostgreSQL: pgsql/src/backend/commands/sequence.c,v 1.109 2004/04/06 16:39:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -315,32 +315,17 @@ AlterSequence(AlterSeqStmt *stmt)
seq = read_info(elm, seqrel, &buf);
page = BufferGetPage(buf);
/* copy old values of options */
new.increment_by = seq->increment_by;
new.max_value = seq->max_value;
new.min_value = seq->min_value;
new.cache_value = seq->cache_value;
new.is_cycled = seq->is_cycled;
new.last_value = seq->last_value;
/* Copy old values of options into workspace */
memcpy(&new, seq, sizeof(FormData_pg_sequence));
/* Check and set new values */
init_params(stmt->options, &new, false);
/* Now okay to update the on-disk tuple */
seq->increment_by = new.increment_by;
seq->max_value = new.max_value;
seq->min_value = new.min_value;
seq->cache_value = new.cache_value;
seq->is_cycled = new.is_cycled;
if (seq->last_value != new.last_value)
{
seq->last_value = new.last_value;
seq->is_called = false;
seq->log_cnt = 1;
}
memcpy(seq, &new, sizeof(FormData_pg_sequence));
/* save info in local cache */
elm->last = new.last_value; /* last returned number */
/* Clear local cache so that we don't think we have cached numbers */
elm->last = new.last_value; /* last returned number */
elm->cached = new.last_value; /* last cached number (forget
* cached values) */
@ -1008,13 +993,19 @@ init_params(List *options, Form_pg_sequence new, bool isInit)
/* START WITH */
if (last_value != NULL)
{
new->last_value = defGetInt64(last_value);
new->is_called = false;
new->log_cnt = 1;
}
else if (isInit)
{
if (new->increment_by > 0)
new->last_value = new->min_value; /* ascending seq */
else
new->last_value = new->max_value; /* descending seq */
new->is_called = false;
new->log_cnt = 1;
}
/* crosscheck */