greenplumn combocid 源码
greenplumn combocid 代码
文件路径：/src/include/utils/combocid.h
/*-------------------------------------------------------------------------
*
* combocid.h
* Combo command ID support routines
*
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/utils/combocid.h
*
*-------------------------------------------------------------------------
*/
#ifndef COMBOCID_H
#define COMBOCID_H
/*
* HeapTupleHeaderGetCmin and HeapTupleHeaderGetCmax function prototypes
* are in access/htup.h, because that's where the macro definitions that
* those functions replaced used to be.
*/
extern void AtEOXact_ComboCid(void);
extern void AtEOXact_ComboCid_Dsm_Detach(void);
extern void RestoreComboCIDState(char *comboCIDstate);
extern void SerializeComboCIDState(Size maxsize, char *start_address);
extern Size EstimateComboCIDStateSpace(void);
#endif /* COMBOCID_H */
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