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Remove global variable scanCommandId in favor of storing a command ID

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in snapshots, per my proposal of a few days ago.  Also, tweak heapam.c
routines (heap_insert, heap_update, heap_delete, heap_mark4update) to
be passed the command ID to use, instead of doing GetCurrentCommandID.
For catalog updates they'll still get passed current command ID, but
for updates generated from the main executor they'll get passed the
command ID saved in the snapshot the query is using.  This should fix
some corner cases associated with functions and triggers that advance
current command ID while an outer query is still in progress.
This commit is contained in:
Tom Lane
2002-05-21 22:05:55 +00:00
parent 0a2682445e
commit 959e61e917
37 changed files with 191 additions and 235 deletions
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6
src/include/access/xact.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: xact.h,v 1.42 2002/04/01 03:34:27 tgl Exp $
* $Id: xact.h,v 1.43 2002/05/21 22:05:55 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -38,7 +38,6 @@ typedef struct TransactionStateData
{
TransactionId transactionIdData;
CommandId commandId;
CommandId scanCommandId;
AbsoluteTime startTime;
int startTimeUsec;
int state;
@@ -101,13 +100,10 @@ extern bool IsTransactionState(void);
extern bool IsAbortedTransactionBlockState(void);
extern TransactionId GetCurrentTransactionId(void);
extern CommandId GetCurrentCommandId(void);
extern CommandId GetScanCommandId(void);
extern void SetScanCommandId(CommandId);
extern AbsoluteTime GetCurrentTransactionStartTime(void);
extern AbsoluteTime GetCurrentTransactionStartTimeUsec(int *usec);
extern bool TransactionIdIsCurrentTransactionId(TransactionId xid);
extern bool CommandIdIsCurrentCommandId(CommandId cid);
extern bool CommandIdGEScanCommandId(CommandId cid);
extern void CommandCounterIncrement(void);
extern void StartTransactionCommand(void);
extern void CommitTransactionCommand(void);