src/include/commands/sequence.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * sequence.h
   4  *        prototypes for sequence.c.
   5  *
   6  * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
   7  * Portions Copyright (c) 1994, Regents of the University of California
   8  *
   9  * src/include/commands/sequence.h
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13 #ifndef SEQUENCE_H
  14 #define SEQUENCE_H
  15
  16 #include "access/xlogreader.h"
  17 #include "catalog/objectaddress.h"
  18 #include "fmgr.h"
  19 #include "lib/stringinfo.h"
  20 #include "nodes/parsenodes.h"
  21 #include "parser/parse_node.h"
  22 #include "storage/relfilenode.h"
  23
  24
  25 typedef struct FormData_pg_sequence_data
  26 {
  27         int64           last_value;
  28         int64           log_cnt;
  29         bool            is_called;
  30 } FormData_pg_sequence_data;
  31
  32 typedef FormData_pg_sequence_data *Form_pg_sequence_data;
  33
  34 /*
  35  * Columns of a sequence relation
  36  */
  37
  38 #define SEQ_COL_LASTVAL                 1
  39 #define SEQ_COL_LOG                             2
  40 #define SEQ_COL_CALLED                  3
  41
  42 #define SEQ_COL_FIRSTCOL                SEQ_COL_LASTVAL
  43 #define SEQ_COL_LASTCOL                 SEQ_COL_CALLED
  44
  45 /* XLOG stuff */
  46 #define XLOG_SEQ_LOG                    0x00
  47
  48 typedef struct xl_seq_rec
  49 {
  50         RelFileNode node;
  51         /* SEQUENCE TUPLE DATA FOLLOWS AT THE END */
  52 } xl_seq_rec;
  53
  54 extern int64 nextval_internal(Oid relid, bool check_permissions);
  55 extern Datum nextval(PG_FUNCTION_ARGS);
  56 extern List *sequence_options(Oid relid);
  57
  58 extern ObjectAddress DefineSequence(ParseState *pstate, CreateSeqStmt *stmt);
  59 extern ObjectAddress AlterSequence(ParseState *pstate, AlterSeqStmt *stmt);
  60 extern void DeleteSequenceTuple(Oid relid);
  61 extern void ResetSequence(Oid seq_relid);
  62 extern void ResetSequenceCaches(void);
  63
  64 extern void seq_redo(XLogReaderState *rptr);
  65 extern void seq_desc(StringInfo buf, XLogReaderState *rptr);
  66 extern const char *seq_identify(uint8 info);
  67 extern void seq_mask(char *pagedata, BlockNumber blkno);
  68
  69 #endif                                                  /* SEQUENCE_H */