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Viewing changes to src/backend/access/transam/xact.c

  • Committer: Bazaar Package Importer
  • Author(s): Martin Pitt
  • Date: 2011-01-03 08:57:10 UTC
  • mfrom: (5.3.10 sid)
  • Revision ID: james.westby@ubuntu.com-20110103085710-v9u121v7u7oq8qca
Tags: 8.4.6-1~hardy1
Automated backport upload; no source changes.

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src/backend/access/transam/xact.c
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 *
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 *
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 * IDENTIFICATION
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 *        $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.274.2.3 2010/01/24 21:49:31 tgl Exp $
 
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 *        $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.274.2.4 2010/07/23 00:43:17 rhaas Exp $
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 *
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 *-------------------------------------------------------------------------
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 */
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        /*
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         * Ensure parent(s) have XIDs, so that a child always has an XID later
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         * than its parent.
 
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         * than its parent.  Musn't recurse here, or we might get a stack overflow
 
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         * if we're at the bottom of a huge stack of subtransactions none of which
 
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         * have XIDs yet.
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         */
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        if (isSubXact && !TransactionIdIsValid(s->parent->transactionId))
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                AssignTransactionId(s->parent);
 
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        {
 
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                TransactionState        p = s->parent;
 
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                TransactionState   *parents;
 
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                size_t  parentOffset = 0;
 
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                parents = palloc(sizeof(TransactionState) *  s->nestingLevel);
 
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                while (p != NULL && !TransactionIdIsValid(p->transactionId))
 
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                {
 
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                        parents[parentOffset++] = p;
 
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                        p = p->parent;
 
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                }
 
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                /*
 
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                 * This is technically a recursive call, but the recursion will
 
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                 * never be more than one layer deep.
 
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                 */
 
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                while (parentOffset != 0)
 
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                        AssignTransactionId(parents[--parentOffset]);
 
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                pfree(parents);
 
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        }
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        /*
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         * Generate a new Xid and record it in PG_PROC and pg_subtrans.