diff options
Diffstat (limited to 'src/include/fmgr.h')
| -rw-r--r-- | src/include/fmgr.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/src/include/fmgr.h b/src/include/fmgr.h index f6462d43a89..298cd12c775 100644 --- a/src/include/fmgr.h +++ b/src/include/fmgr.h @@ -11,7 +11,7 @@ * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/fmgr.h,v 1.49 2007/01/05 22:19:50 momjian Exp $ + * $PostgreSQL: pgsql/src/include/fmgr.h,v 1.50 2007/04/06 04:21:44 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -153,6 +153,11 @@ extern void fmgr_info_copy(FmgrInfo *dstinfo, FmgrInfo *srcinfo, * if you need a modifiable copy of the input. Caller is expected to have * checked for null inputs first, if necessary. * + * pg_detoast_datum_packed() will return packed (1-byte header) datums + * unmodified. It will still expand an externally toasted or compressed datum. + * The resulting datum can be accessed using VARSIZE_ANY() and VARDATA_ANY() + * (beware of multiple evaluations in those macros!) + * * Note: it'd be nice if these could be macros, but I see no way to do that * without evaluating the arguments multiple times, which is NOT acceptable. */ @@ -160,6 +165,7 @@ extern struct varlena *pg_detoast_datum(struct varlena * datum); extern struct varlena *pg_detoast_datum_copy(struct varlena * datum); extern struct varlena *pg_detoast_datum_slice(struct varlena * datum, int32 first, int32 count); +extern struct varlena *pg_detoast_datum_packed(struct varlena * datum); #define PG_DETOAST_DATUM(datum) \ pg_detoast_datum((struct varlena *) DatumGetPointer(datum)) @@ -168,6 +174,8 @@ extern struct varlena *pg_detoast_datum_slice(struct varlena * datum, #define PG_DETOAST_DATUM_SLICE(datum,f,c) \ pg_detoast_datum_slice((struct varlena *) DatumGetPointer(datum), \ (int32) f, (int32) c) +#define PG_DETOAST_DATUM_PACKED(datum) \ + pg_detoast_datum_packed((struct varlena *) DatumGetPointer(datum)) /* * Support for cleaning up detoasted copies of inputs. This must only @@ -207,9 +215,13 @@ extern struct varlena *pg_detoast_datum_slice(struct varlena * datum, #define PG_GETARG_VARLENA_P(n) PG_DETOAST_DATUM(PG_GETARG_DATUM(n)) /* DatumGetFoo macros for varlena types will typically look like this: */ #define DatumGetByteaP(X) ((bytea *) PG_DETOAST_DATUM(X)) +#define DatumGetByteaPP(X) ((bytea *) PG_DETOAST_DATUM_PACKED(X)) #define DatumGetTextP(X) ((text *) PG_DETOAST_DATUM(X)) +#define DatumGetTextPP(X) ((text *) PG_DETOAST_DATUM_PACKED(X)) #define DatumGetBpCharP(X) ((BpChar *) PG_DETOAST_DATUM(X)) +#define DatumGetBpCharPP(X) ((BpChar *) PG_DETOAST_DATUM_PACKED(X)) #define DatumGetVarCharP(X) ((VarChar *) PG_DETOAST_DATUM(X)) +#define DatumGetVarCharPP(X) ((VarChar *) PG_DETOAST_DATUM_PACKED(X)) #define DatumGetHeapTupleHeader(X) ((HeapTupleHeader) PG_DETOAST_DATUM(X)) /* And we also offer variants that return an OK-to-write copy */ #define DatumGetByteaPCopy(X) ((bytea *) PG_DETOAST_DATUM_COPY(X)) @@ -224,9 +236,13 @@ extern struct varlena *pg_detoast_datum_slice(struct varlena * datum, #define DatumGetVarCharPSlice(X,m,n) ((VarChar *) PG_DETOAST_DATUM_SLICE(X,m,n)) /* GETARG macros for varlena types will typically look like this: */ #define PG_GETARG_BYTEA_P(n) DatumGetByteaP(PG_GETARG_DATUM(n)) +#define PG_GETARG_BYTEA_PP(n) DatumGetByteaPP(PG_GETARG_DATUM(n)) #define PG_GETARG_TEXT_P(n) DatumGetTextP(PG_GETARG_DATUM(n)) +#define PG_GETARG_TEXT_PP(n) DatumGetTextPP(PG_GETARG_DATUM(n)) #define PG_GETARG_BPCHAR_P(n) DatumGetBpCharP(PG_GETARG_DATUM(n)) +#define PG_GETARG_BPCHAR_PP(n) DatumGetBpCharPP(PG_GETARG_DATUM(n)) #define PG_GETARG_VARCHAR_P(n) DatumGetVarCharP(PG_GETARG_DATUM(n)) +#define PG_GETARG_VARCHAR_PP(n) DatumGetVarCharPP(PG_GETARG_DATUM(n)) #define PG_GETARG_HEAPTUPLEHEADER(n) DatumGetHeapTupleHeader(PG_GETARG_DATUM(n)) /* And we also offer variants that return an OK-to-write copy */ #define PG_GETARG_BYTEA_P_COPY(n) DatumGetByteaPCopy(PG_GETARG_DATUM(n)) |