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Remove the t_datamcxt field of HeapTupleData. This was introduced for

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the convenience of tuptoaster.c and is no longer needed, so may as well
get rid of some small amount of overhead.
This commit is contained in:
Tom Lane
2005-11-20 19:49:08 +00:00
parent 40314f2dac
commit dd218ae7b0
13 changed files with 24 additions and 66 deletions
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19
src/include/access/htup.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/htup.h,v 1.78 2005/10/15 02:49:42 momjian Exp $
* $PostgreSQL: pgsql/src/include/access/htup.h,v 1.79 2005/11/20 19:49:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -361,20 +361,20 @@ do { \
*
* * Pointer to a tuple in a disk buffer: t_data points directly into the
* buffer (which the code had better be holding a pin on, but this is not
* reflected in HeapTupleData itself). t_datamcxt must be NULL.
* reflected in HeapTupleData itself).
*
* * Pointer to nothing: t_data and t_datamcxt are NULL. This is used as
* a failure indication in some functions.
* * Pointer to nothing: t_data is NULL. This is used as a failure indication
* in some functions.
*
* * Part of a palloc'd tuple: the HeapTupleData itself and the tuple
* form a single palloc'd chunk. t_data points to the memory location
* immediately following the HeapTupleData struct (at offset HEAPTUPLESIZE),
* and t_datamcxt is the containing context. This is used as the output
* format of heap_form_tuple and related routines.
* immediately following the HeapTupleData struct (at offset HEAPTUPLESIZE).
* This is the output format of heap_form_tuple and related routines.
*
* * Separately allocated tuple: t_data points to a palloc'd chunk that
* is not adjacent to the HeapTupleData, and t_datamcxt is the context
* containing that chunk.
* is not adjacent to the HeapTupleData. (This case is deprecated since
* it's difficult to tell apart from case #1. It should be used only in
* limited contexts where the code knows that case #1 will never apply.)
*
* t_len should always be valid, except in the pointer-to-nothing case.
* t_self and t_tableOid should be valid if the HeapTupleData points to
@@ -386,7 +386,6 @@ typedef struct HeapTupleData
uint32 t_len; /* length of *t_data */
ItemPointerData t_self; /* SelfItemPointer */
Oid t_tableOid; /* table the tuple came from */
MemoryContext t_datamcxt; /* memory context of allocation */
HeapTupleHeader t_data; /* -> tuple header and data */
} HeapTupleData;