sequence.h

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/*-------------------------------------------------------------------------
 *
 * sequence.h
 *    prototypes for sequence.c.
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/commands/sequence.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef SEQUENCE_H
#define SEQUENCE_H
 
#include "access/xlogreader.h"
#include "catalog/objectaddress.h"
#include "fmgr.h"
#include "lib/stringinfo.h"
#include "nodes/parsenodes.h"
#include "parser/parse_node.h"
#include "storage/relfilelocator.h"
 
 
typedef struct FormData_pg_sequence_data
{
    int64       last_value;
    int64       log_cnt;
    bool        is_called;
} FormData_pg_sequence_data;
 
typedef FormData_pg_sequence_data *Form_pg_sequence_data;
 
/*
 * Columns of a sequence relation
 */
 
#define SEQ_COL_LASTVAL         1
#define SEQ_COL_LOG             2
#define SEQ_COL_CALLED          3
 
#define SEQ_COL_FIRSTCOL        SEQ_COL_LASTVAL
#define SEQ_COL_LASTCOL         SEQ_COL_CALLED
 
/* XLOG stuff */
#define XLOG_SEQ_LOG            0x00
 
typedef struct xl_seq_rec
{
    RelFileLocator locator;
    /* SEQUENCE TUPLE DATA FOLLOWS AT THE END */
} xl_seq_rec;
 
extern int64 nextval_internal(Oid relid, bool check_permissions);
extern Datum nextval(PG_FUNCTION_ARGS);
extern List *sequence_options(Oid relid);
 
extern ObjectAddress DefineSequence(ParseState *pstate, CreateSeqStmt *seq);
extern ObjectAddress AlterSequence(ParseState *pstate, AlterSeqStmt *stmt);
extern void SequenceChangePersistence(Oid relid, char newrelpersistence);
extern void DeleteSequenceTuple(Oid relid);
extern void ResetSequence(Oid seq_relid);
extern void ResetSequenceCaches(void);
 
extern void seq_redo(XLogReaderState *record);
extern void seq_desc(StringInfo buf, XLogReaderState *record);
extern const char *seq_identify(uint8 info);
extern void seq_mask(char *page, BlockNumber blkno);
 
#endif                          /* SEQUENCE_H */