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/*------------------------------------------------------------------------- * * freespace.h * POSTGRES free space map for quickly finding free space in relations * * * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/storage/freespace.h * *------------------------------------------------------------------------- */ #ifndef FREESPACE_H_ #define FREESPACE_H_ #include "storage/block.h" #include "storage/relfilenode.h" #include "utils/relcache.h" /* prototypes for public functions in freespace.c */ extern Size GetRecordedFreeSpace(Relation rel, BlockNumber heapBlk); extern BlockNumber GetPageWithFreeSpace(Relation rel, Size spaceNeeded); extern BlockNumber RecordAndGetPageWithFreeSpace(Relation rel, BlockNumber oldPage, Size oldSpaceAvail, Size spaceNeeded); extern void RecordPageWithFreeSpace(Relation rel, BlockNumber heapBlk, Size spaceAvail); extern void XLogRecordPageWithFreeSpace(RelFileNode rnode, BlockNumber heapBlk, Size spaceAvail); extern void FreeSpaceMapTruncateRel(Relation rel, BlockNumber nblocks); extern void FreeSpaceMapVacuum(Relation rel); extern void UpdateFreeSpaceMap(Relation rel, BlockNumber startBlkNum, BlockNumber endBlkNum, Size freespace); #endif /* FREESPACE_H_ */