Initial revision

git-svn-id: https://svn.code.sf.net/p/flaim/code/trunk@621 0109f412-320b-0410-ab79-c3e0c5ffbbe6
2006-06-30 21:45:39 +00:00
parent 8c0b2ce402
commit fce94ee1f0
3 changed files with 677 additions and 0 deletions
--- a/sql/src/deleterow.cpp
+++ b/sql/src/deleterow.cpp
@@ -0,0 +1,138 @@
+//------------------------------------------------------------------------------
+// Desc:	This module contains the routines for inserting a row into a table.
+//
+// Tabs:	3
+//
+//		Copyright (c) 2006 Novell, Inc. All Rights Reserved.
+//
+//		This program is free software; you can redistribute it and/or
+//		modify it under the terms of version 2 of the GNU General Public
+//		License as published by the Free Software Foundation.
+//
+//		This program is distributed in the hope that it will be useful,
+//		but WITHOUT ANY WARRANTY; without even the implied warranty of
+//		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+//		GNU General Public License for more details.
+//
+//		You should have received a copy of the GNU General Public License
+//		along with this program; if not, contact Novell, Inc.
+//
+//		To contact Novell about this file by physical or electronic mail,
+//		you may find current contact information at www.novell.com
+//
+// $Id$
+//------------------------------------------------------------------------------
+
+#include "flaimsys.h"
+
+//------------------------------------------------------------------------------
+// Desc:	Delete a row from the database.
+//------------------------------------------------------------------------------
+RCODE F_Db::deleteRow(
+	FLMUINT				uiTableNum,
+	FLMUINT64			ui64RowId,
+	FLMBOOL				bLogDelete)
+{
+	RCODE					rc = NE_SFLM_OK;
+	FLMBYTE				ucKeyBuf[ FLM_MAX_NUM_BUF_SIZE];
+	FLMUINT				uiKeyLen;
+	F_Row *				pRow = NULL;
+	F_Btree *			pBTree = NULL;
+	FLMBOOL				bStartedTrans = FALSE;
+	
+	// Make sure we are in an update transaction.
+	
+	if (RC_BAD( rc = checkTransaction( SFLM_UPDATE_TRANS, &bStartedTrans)))
+	{
+		goto Exit;
+	}
+	
+	// Cannot delete from internal system tables, unless it is an
+	// internal delete.
+	
+	if (bLogDelete)
+	{
+		F_TABLE *	pTable = m_pDict->getTable( uiTableNum);
+		if (pTable->bSystemTable)
+		{
+			rc = RC_SET( NE_SFLM_CANNOT_DELETE_IN_SYSTEM_TABLE);
+			goto Exit;
+		}
+	}
+	
+	// First we need to retrieve the row and update any index keys.
+	
+	if (RC_BAD( rc = gv_SFlmSysData.pRowCacheMgr->retrieveRow( this,
+								uiTableNum, ui64RowId, &pRow)))
+	{
+		goto Exit;
+	}
+	
+	// Delete any index keys for the row.
+	
+	if (RC_BAD( rc = updateIndexKeys( uiTableNum, pRow, NULL)))
+	{
+		goto Exit;
+	}
+	
+	// Get a B-Tree object to delete the row from the b-tree.
+
+	if( RC_BAD( rc = getCachedBTree( uiTableNum, &pBTree)))
+	{
+		goto Exit;
+	}
+	uiKeyLen = sizeof( ucKeyBuf);
+	if( RC_BAD( rc = flmNumber64ToStorage( ui64RowId, &uiKeyLen, ucKeyBuf,
+									FALSE, TRUE)))
+	{
+		goto Exit;
+	}
+	if (RC_BAD( rc = pBTree->btRemoveEntry( ucKeyBuf, uiKeyLen)))
+	{
+		goto Exit;
+	}
+
+	// Remove the row from row cache if it is there.
+	
+	gv_SFlmSysData.pRowCacheMgr->removeRow( this, pRow, TRUE, FALSE);
+	pRow = NULL;
+	
+	if (bLogDelete)
+	{
+		if (RC_BAD( rc = m_pDatabase->m_pRfl->logDeleteRow( this, uiTableNum, ui64RowId)))
+		{
+			goto Exit;
+		}
+	}
+
+	// Commit the transaction if we started it
+	
+	if (bStartedTrans)
+	{
+		bStartedTrans = FALSE;
+		if (RC_BAD( rc = transCommit()))
+		{
+			goto Exit;
+		}
+	}
+
+Exit:
+
+	if (bStartedTrans)
+	{
+		transAbort();
+	}
+
+	if (pRow)
+	{
+		pRow->ReleaseRow();
+	}
+
+	if (pBTree)
+	{
+		pBTree->Release();
+	}
+
+	return( rc);
+}
+