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

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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
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6
src/include/access/itup.h
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@@ -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))