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00001 /*------------------------------------------------------------------------- 00002 * 00003 * freespace.h 00004 * POSTGRES free space map for quickly finding free space in relations 00005 * 00006 * 00007 * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group 00008 * Portions Copyright (c) 1994, Regents of the University of California 00009 * 00010 * src/include/storage/freespace.h 00011 * 00012 *------------------------------------------------------------------------- 00013 */ 00014 #ifndef FREESPACE_H_ 00015 #define FREESPACE_H_ 00016 00017 #include "storage/block.h" 00018 #include "storage/relfilenode.h" 00019 #include "utils/relcache.h" 00020 00021 /* prototypes for public functions in freespace.c */ 00022 extern Size GetRecordedFreeSpace(Relation rel, BlockNumber heapBlk); 00023 extern BlockNumber GetPageWithFreeSpace(Relation rel, Size spaceNeeded); 00024 extern BlockNumber RecordAndGetPageWithFreeSpace(Relation rel, 00025 BlockNumber oldPage, 00026 Size oldSpaceAvail, 00027 Size spaceNeeded); 00028 extern void RecordPageWithFreeSpace(Relation rel, BlockNumber heapBlk, 00029 Size spaceAvail); 00030 extern void XLogRecordPageWithFreeSpace(RelFileNode rnode, BlockNumber heapBlk, 00031 Size spaceAvail); 00032 00033 extern void FreeSpaceMapTruncateRel(Relation rel, BlockNumber nblocks); 00034 extern void FreeSpaceMapVacuum(Relation rel); 00035 00036 #endif /* FREESPACE_H_ */
1.7.1