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Split 'BufFile' routines out of fd.c into a new module, buffile.c. Extend

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BufFile so that it handles multi-segment temporary files transparently.
This allows sorts and hashes to work with data exceeding 2Gig (or whatever
the local limit on file size is).  Change psort.c to use relative seeks
instead of absolute seeks for backwards scanning, so that it won't fail
when the data volume exceeds 2Gig.
This commit is contained in:
Tom Lane
1999-10-13 15:02:32 +00:00
parent c3ac9f07b7
commit db3c4c3a2d
12 changed files with 707 additions and 318 deletions
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14
src/backend/executor/nodeHashjoin.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/nodeHashjoin.c,v 1.26 1999/07/17 20:16:58 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/nodeHashjoin.c,v 1.27 1999/10/13 15:02:25 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -129,12 +129,7 @@ ExecHashJoin(HashJoin *node)
* ----------------
*/
for (i = 0; i < hashtable->nbatch; i++)
{
File tfile = OpenTemporaryFile();
Assert(tfile >= 0);
hashtable->outerBatchFile[i] = BufFileCreate(tfile);
}
hashtable->outerBatchFile[i] = BufFileCreateTemp();
}
else if (hashtable == NULL)
return NULL;
@ -551,13 +546,12 @@ ExecHashJoinNewBatch(HashJoinState *hjstate)
* Rewind inner and outer batch files for this batch, so that we can
* start reading them.
*/
if (BufFileSeek(hashtable->outerBatchFile[newbatch - 1], 0L,
SEEK_SET) != 0L)
if (BufFileSeek(hashtable->outerBatchFile[newbatch - 1], 0, 0L, SEEK_SET))
elog(ERROR, "Failed to rewind hash temp file");
innerFile = hashtable->innerBatchFile[newbatch - 1];
if (BufFileSeek(innerFile, 0L, SEEK_SET) != 0L)
if (BufFileSeek(innerFile, 0, 0L, SEEK_SET))
elog(ERROR, "Failed to rewind hash temp file");
/*