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Provide a build-time option to store large relations as single files, rather

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than dividing them into 1GB segments as has been our longtime practice.  This
requires working support for large files in the operating system; at least for
the time being, it won't be the default.

Zdenek Kotala
This commit is contained in:
Tom Lane
2008-03-10 20:06:27 +00:00
parent b6912af22b
commit f0828b2fc3
12 changed files with 595 additions and 100 deletions
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8
src/backend/utils/sort/tuplestore.c
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@@ -38,7 +38,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/sort/tuplestore.c,v 1.36 2008/01/01 19:45:55 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/sort/tuplestore.c,v 1.37 2008/03/10 20:06:27 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -134,14 +134,14 @@ struct Tuplestorestate
bool eof_reached; /* read reached EOF (always valid) */
int current; /* next array index (valid if INMEM) */
int readpos_file; /* file# (valid if WRITEFILE and not eof) */
long readpos_offset; /* offset (valid if WRITEFILE and not eof) */
off_t readpos_offset; /* offset (valid if WRITEFILE and not eof) */
int writepos_file; /* file# (valid if READFILE) */
long writepos_offset; /* offset (valid if READFILE) */
off_t writepos_offset; /* offset (valid if READFILE) */
/* markpos_xxx holds marked position for mark and restore */
int markpos_current; /* saved "current" */
int markpos_file; /* saved "readpos_file" */
long markpos_offset; /* saved "readpos_offset" */
off_t markpos_offset; /* saved "readpos_offset" */
};
#define COPYTUP(state,tup) ((*(state)->copytup) (state, tup))