src/include/commands/sequence.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * sequence.h
   4  *        prototypes for sequence.c.
   5  *
   6  *
   7  *-------------------------------------------------------------------------
   8  */
   9 #ifndef SEQUENCE_H
  10 #define SEQUENCE_H
  11
  12 #include "nodes/parsenodes.h"
  13 #include "access/xlog.h"
  14
  15 typedef struct FormData_pg_sequence
  16 {
  17         NameData        sequence_name;
  18         int32           last_value;
  19         int32           increment_by;
  20         int32           max_value;
  21         int32           min_value;
  22         int32           cache_value;
  23         int32           log_cnt;
  24         char            is_cycled;
  25         char            is_called;
  26 } FormData_pg_sequence;
  27
  28 typedef FormData_pg_sequence *Form_pg_sequence;
  29
  30 /*
  31  * Columns of a sequence relation
  32  */
  33
  34 #define SEQ_COL_NAME                    1
  35 #define SEQ_COL_LASTVAL                 2
  36 #define SEQ_COL_INCBY                   3
  37 #define SEQ_COL_MAXVALUE                4
  38 #define SEQ_COL_MINVALUE                5
  39 #define SEQ_COL_CACHE                   6
  40 #define SEQ_COL_LOG                             7
  41 #define SEQ_COL_CYCLE                   8
  42 #define SEQ_COL_CALLED                  9
  43
  44 #define SEQ_COL_FIRSTCOL                SEQ_COL_NAME
  45 #define SEQ_COL_LASTCOL                 SEQ_COL_CALLED
  46
  47 /* XLOG stuff */
  48 #define XLOG_SEQ_LOG                    0x00
  49
  50 typedef struct xl_seq_rec
  51 {
  52         RelFileNode node;
  53         /* SEQUENCE TUPLE DATA FOLLOWS AT THE END */
  54 } xl_seq_rec;
  55
  56 extern Datum nextval(PG_FUNCTION_ARGS);
  57 extern Datum currval(PG_FUNCTION_ARGS);
  58 extern Datum setval(PG_FUNCTION_ARGS);
  59 extern Datum setval_and_iscalled(PG_FUNCTION_ARGS);
  60
  61 extern void DefineSequence(CreateSeqStmt *stmt);
  62 extern void CloseSequences(void);
  63
  64 extern void seq_redo(XLogRecPtr lsn, XLogRecord *rptr);
  65 extern void seq_undo(XLogRecPtr lsn, XLogRecord *rptr);
  66 extern void seq_desc(char *buf, uint8 xl_info, char *rec);
  67
  68 #endif   /* SEQUENCE_H */