diff options
Diffstat (limited to 'src/backend')
| -rw-r--r-- | src/backend/utils/adt/pg_lsn.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/src/backend/utils/adt/pg_lsn.c b/src/backend/utils/adt/pg_lsn.c index d1448aee7bd..aa0f690412f 100644 --- a/src/backend/utils/adt/pg_lsn.c +++ b/src/backend/utils/adt/pg_lsn.c @@ -1,9 +1,9 @@ /*------------------------------------------------------------------------- * * pg_lsn.c - * Internal PostgreSQL LSN operations + * Operations for the pg_lsn datatype. * - * Portions Copyright (c) 1996-2011, PostgreSQL Global Development Group + * Portions Copyright (c) 1996-2014, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION @@ -13,6 +13,7 @@ */ #include "postgres.h" +#include "access/hash.h" #include "funcapi.h" #include "libpq/pqformat.h" #include "utils/builtins.h" @@ -153,6 +154,29 @@ pg_lsn_ge(PG_FUNCTION_ARGS) PG_RETURN_BOOL(lsn1 >= lsn2); } +/* btree index opclass support */ +Datum +pg_lsn_cmp(PG_FUNCTION_ARGS) +{ + XLogRecPtr a = PG_GETARG_LSN(0); + XLogRecPtr b = PG_GETARG_LSN(1); + + if (a > b) + PG_RETURN_INT32(1); + else if (a == b) + PG_RETURN_INT32(0); + else + PG_RETURN_INT32(-1); +} + +/* hash index opclass support */ +Datum +pg_lsn_hash(PG_FUNCTION_ARGS) +{ + /* We can use hashint8 directly */ + return hashint8(fcinfo); +} + /*---------------------------------------------------------- * Arithmetic operators on PostgreSQL LSNs. |