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Clean up and document the API for XLogOpenRelation and XLogReadBuffer.

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This commit doesn't make much functional change, but it does eliminate some
duplicated code --- for instance, PageIsNew tests are now done inside
XLogReadBuffer rather than by each caller.
The GIST xlog code still needs a lot of love, but I'll worry about that
separately.
This commit is contained in:
Tom Lane
2006-03-29 21:17:39 +00:00
parent 2154e1c11e
commit 6d61cdec07
14 changed files with 562 additions and 397 deletions
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12
src/backend/commands/sequence.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/sequence.c,v 1.130 2006/03/24 04:32:13 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/sequence.c,v 1.131 2006/03/29 21:17:38 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1140,14 +1140,8 @@ seq_redo(XLogRecPtr lsn, XLogRecord *record)
elog(PANIC, "seq_redo: unknown op code %u", info);
reln = XLogOpenRelation(xlrec->node);
if (!RelationIsValid(reln))
return;
buffer = XLogReadBuffer(true, reln, 0);
if (!BufferIsValid(buffer))
elog(PANIC, "seq_redo: can't read block 0 of rel %u/%u/%u",
xlrec->node.spcNode, xlrec->node.dbNode, xlrec->node.relNode);
buffer = XLogReadBuffer(reln, 0, true);
Assert(BufferIsValid(buffer));
page = (Page) BufferGetPage(buffer);
/* Always reinit the page and reinstall the magic number */