database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-10-25 13:17:41 +03:00
Code Activity

Clean up comments to be careful about the distinction between variable-

Browse Source 
width types and varlena types, since with the introduction of CSTRING as
a more-or-less-real type, these concepts aren't identical.  I've tried to
use varlena consistently to denote datatypes with typlen = -1, ie, they
have a length word and are potentially TOASTable; while the term variable
width covers both varlena and cstring (and, perhaps, someday other types
with other rules for computing the actual width).  No code changes in this
commit except for renaming a couple macros.
This commit is contained in:
Tom Lane
2002-08-25 17:20:01 +00:00
parent d46172e4fa
commit 58de480999
11 changed files with 66 additions and 68 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/include/access/htup.h
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: htup.h,v 1.57 2002/07/20 05:16:59 momjian Exp $
* $Id: htup.h,v 1.58 2002/08/25 17:20:01 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -95,8 +95,7 @@ typedef HeapTupleHeaderData *HeapTupleHeader;
* information stored in t_infomask:
*/
#define HEAP_HASNULL 0x0001 /* has null attribute(s) */
#define HEAP_HASVARLENA 0x0002 /* has variable length
* attribute(s) */
#define HEAP_HASVARWIDTH 0x0002 /* has variable-width attribute(s) */
#define HEAP_HASEXTERNAL 0x0004 /* has external stored
* attribute(s) */
#define HEAP_HASCOMPRESSED 0x0008 /* has compressed stored
@@ -425,7 +424,7 @@ typedef HeapTupleData *HeapTuple;
(!(((HeapTuple) (tuple))->t_data->t_infomask & HEAP_HASNULL))
#define HeapTupleAllFixed(tuple) \
(!(((HeapTuple) (tuple))->t_data->t_infomask & HEAP_HASVARLENA))
(!(((HeapTuple) (tuple))->t_data->t_infomask & HEAP_HASVARWIDTH))
#define HeapTupleHasExternal(tuple) \
((((HeapTuple)(tuple))->t_data->t_infomask & HEAP_HASEXTERNAL) != 0)

6
src/include/access/itup.h
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: itup.h,v 1.35 2002/06/20 20:29:43 momjian Exp $
* $Id: itup.h,v 1.36 2002/08/25 17:20:01 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -28,7 +28,7 @@ typedef struct IndexTupleData
* t_info is layed out in the following fashion:
*
* 15th (high) bit: has nulls
* 14th bit: has varlenas
* 14th bit: has var-width attributes
* 13th bit: unused
* 12-0 bit: size of tuple
* ---------------
@@ -67,7 +67,7 @@ typedef InsertIndexResultData *InsertIndexResult;
#define IndexTupleSize(itup) ((Size) (((IndexTuple) (itup))->t_info & INDEX_SIZE_MASK))
#define IndexTupleDSize(itup) ((Size) ((itup).t_info & INDEX_SIZE_MASK))
#define IndexTupleHasNulls(itup) ((((IndexTuple) (itup))->t_info & INDEX_NULL_MASK))
#define IndexTupleHasVarlenas(itup) ((((IndexTuple) (itup))->t_info & INDEX_VAR_MASK))
#define IndexTupleHasVarwidths(itup) ((((IndexTuple) (itup))->t_info & INDEX_VAR_MASK))
#define IndexTupleHasMinHeader(itup) (!IndexTupleHasNulls(itup))