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657c098e41
last nextval() or setval() performed by the current session. Update the docs, add regression tests, and bump the catalog version. Patch from Dennis Björklund, various improvements by Neil Conway.
109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
/*-------------------------------------------------------------------------
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*
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* sequence.h
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* prototypes for sequence.c.
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/commands/sequence.h,v 1.32 2005/06/07 07:08:35 neilc Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef SEQUENCE_H
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#define SEQUENCE_H
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#include "nodes/parsenodes.h"
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#include "access/xlog.h"
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#include "fmgr.h"
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/*
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* On a machine with no 64-bit-int C datatype, sizeof(int64) will not be 8,
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* but we need this struct type to line up with the way that a sequence
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* table is defined --- and pg_type will say that int8 is 8 bytes anyway.
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* So, we need padding. Ugly but necessary.
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*/
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typedef struct FormData_pg_sequence
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{
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NameData sequence_name;
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#ifndef INT64_IS_BUSTED
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int64 last_value;
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int64 increment_by;
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int64 max_value;
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int64 min_value;
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int64 cache_value;
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int64 log_cnt;
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#else
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int32 last_value;
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int32 pad1;
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int32 increment_by;
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int32 pad2;
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int32 max_value;
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int32 pad3;
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int32 min_value;
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int32 pad4;
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int32 cache_value;
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int32 pad5;
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int32 log_cnt;
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int32 pad6;
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#endif
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bool is_cycled;
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bool is_called;
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} FormData_pg_sequence;
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typedef FormData_pg_sequence *Form_pg_sequence;
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/*
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* Columns of a sequence relation
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*/
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#define SEQ_COL_NAME 1
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#define SEQ_COL_LASTVAL 2
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#define SEQ_COL_INCBY 3
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#define SEQ_COL_MAXVALUE 4
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#define SEQ_COL_MINVALUE 5
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#define SEQ_COL_CACHE 6
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#define SEQ_COL_LOG 7
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#define SEQ_COL_CYCLE 8
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#define SEQ_COL_CALLED 9
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#define SEQ_COL_FIRSTCOL SEQ_COL_NAME
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#define SEQ_COL_LASTCOL SEQ_COL_CALLED
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/* XLOG stuff */
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#define XLOG_SEQ_LOG 0x00
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typedef struct xl_seq_rec
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{
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RelFileNode node;
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/* SEQUENCE TUPLE DATA FOLLOWS AT THE END */
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} xl_seq_rec;
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extern Datum nextval(PG_FUNCTION_ARGS);
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extern Datum currval(PG_FUNCTION_ARGS);
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extern Datum lastval(PG_FUNCTION_ARGS);
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extern Datum setval(PG_FUNCTION_ARGS);
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extern Datum setval_and_iscalled(PG_FUNCTION_ARGS);
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extern void DefineSequence(CreateSeqStmt *stmt);
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extern void AlterSequence(AlterSeqStmt *stmt);
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extern void seq_redo(XLogRecPtr lsn, XLogRecord *rptr);
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extern void seq_desc(char *buf, uint8 xl_info, char *rec);
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/* Set the upper and lower bounds of a sequence */
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#ifndef INT64_IS_BUSTED
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#ifdef HAVE_LL_CONSTANTS
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#define SEQ_MAXVALUE ((int64) 0x7FFFFFFFFFFFFFFFLL)
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#else
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#define SEQ_MAXVALUE ((int64) 0x7FFFFFFFFFFFFFFF)
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#endif
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#else /* INT64_IS_BUSTED */
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#define SEQ_MAXVALUE ((int64) 0x7FFFFFFF)
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#endif /* INT64_IS_BUSTED */
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#define SEQ_MINVALUE (-SEQ_MAXVALUE)
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#endif /* SEQUENCE_H */
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