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4c8ab1b91d
This is needed to allow ORDER BY, DISTINCT, etc to work as expected for
pg_lsn values.
We had previously decided to put this off for 9.5, but in view of commit
eeca4cd35e there's no reason to avoid a
catversion bump for 9.4beta2, and this does make a pretty significant
usability difference for pg_lsn.
Michael Paquier, with fixes from Andres Freund and Tom Lane
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* pg_lsn.h
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* Declarations for operations on log sequence numbers (LSNs) of
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* PostgreSQL.
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*
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*
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* Portions Copyright (c) 1996-2014, 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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* src/include/utils/pg_lsn.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PG_LSN_H
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#define PG_LSN_H
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#include "fmgr.h"
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#include "access/xlogdefs.h"
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extern Datum pg_lsn_in(PG_FUNCTION_ARGS);
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extern Datum pg_lsn_out(PG_FUNCTION_ARGS);
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extern Datum pg_lsn_recv(PG_FUNCTION_ARGS);
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extern Datum pg_lsn_send(PG_FUNCTION_ARGS);
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extern Datum pg_lsn_eq(PG_FUNCTION_ARGS);
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extern Datum pg_lsn_ne(PG_FUNCTION_ARGS);
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extern Datum pg_lsn_lt(PG_FUNCTION_ARGS);
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extern Datum pg_lsn_gt(PG_FUNCTION_ARGS);
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extern Datum pg_lsn_le(PG_FUNCTION_ARGS);
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extern Datum pg_lsn_ge(PG_FUNCTION_ARGS);
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extern Datum pg_lsn_cmp(PG_FUNCTION_ARGS);
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extern Datum pg_lsn_hash(PG_FUNCTION_ARGS);
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extern Datum pg_lsn_mi(PG_FUNCTION_ARGS);
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#define DatumGetLSN(X) ((XLogRecPtr) DatumGetInt64(X))
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#define LSNGetDatum(X) (Int64GetDatum((int64) (X)))
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#define PG_GETARG_LSN(n) DatumGetLSN(PG_GETARG_DATUM(n))
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#define PG_RETURN_LSN(x) return LSNGetDatum(x)
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#endif /* PG_LSN_H */
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