wine/dlls/msi/insert.c
Robert Shearman 9f487ba1de msi: Optimise WHERE operations.
Optimise WHERE operations on matching against strings by adding a new
function find_matching_rows to the views, which eliminates the need to
examine every record when executing a query. Implement this function
in the table using a hash table on the ID stored in the data.
2006-03-20 12:03:04 +01:00

277 lines
6.4 KiB
C

/*
* Implementation of the Microsoft Installer (msi.dll)
*
* Copyright 2004 Mike McCormack for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "wine/debug.h"
#include "msi.h"
#include "msiquery.h"
#include "objbase.h"
#include "objidl.h"
#include "msipriv.h"
#include "winnls.h"
#include "query.h"
WINE_DEFAULT_DEBUG_CHANNEL(msidb);
/* below is the query interface to a table */
typedef struct tagMSIINSERTVIEW
{
MSIVIEW view;
MSIDATABASE *db;
BOOL bIsTemp;
MSIVIEW *sv;
column_info *vals;
} MSIINSERTVIEW;
static UINT INSERT_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
{
MSIINSERTVIEW *iv = (MSIINSERTVIEW*)view;
TRACE("%p %d %d %p\n", iv, row, col, val );
return ERROR_FUNCTION_FAILED;
}
/*
* INSERT_merge_record
*
* Merge a value_list and a record to create a second record.
* Replace wildcard entries in the valuelist with values from the record
*/
static MSIRECORD *INSERT_merge_record( UINT fields, column_info *vl, MSIRECORD *rec )
{
MSIRECORD *merged;
DWORD wildcard_count = 1, i;
const WCHAR *str;
merged = MSI_CreateRecord( fields );
for( i=1; i <= fields; i++ )
{
if( !vl )
{
TRACE("Not enough elements in the list to insert\n");
goto err;
}
switch( vl->val->type )
{
case EXPR_SVAL:
TRACE("field %ld -> %s\n", i, debugstr_w(vl->val->u.sval));
MSI_RecordSetStringW( merged, i, vl->val->u.sval );
break;
case EXPR_IVAL:
MSI_RecordSetInteger( merged, i, vl->val->u.ival );
break;
case EXPR_WILDCARD:
if( !rec )
goto err;
if( MSI_RecordIsNull( rec, wildcard_count ) )
goto err;
str = MSI_RecordGetString( rec, wildcard_count );
MSI_RecordSetStringW( merged, i, str );
wildcard_count++;
break;
default:
ERR("Unknown expression type %d\n", vl->val->type);
}
vl = vl->next;
}
return merged;
err:
msiobj_release( &merged->hdr );
return NULL;
}
static UINT INSERT_execute( struct tagMSIVIEW *view, MSIRECORD *record )
{
MSIINSERTVIEW *iv = (MSIINSERTVIEW*)view;
UINT r, col_count = 0;
MSIVIEW *sv;
MSIRECORD *values = NULL;
TRACE("%p %p\n", iv, record );
sv = iv->sv;
if( !sv )
return ERROR_FUNCTION_FAILED;
r = sv->ops->execute( sv, 0 );
TRACE("tv execute returned %x\n", r);
if( r )
return r;
r = sv->ops->get_dimensions( sv, NULL, &col_count );
if( r )
goto err;
/*
* Merge the wildcard values into the list of values provided
* in the query, and create a record containing both.
*/
values = INSERT_merge_record( col_count, iv->vals, record );
if( !values )
goto err;
r = sv->ops->insert_row( sv, values );
err:
if( values )
msiobj_release( &values->hdr );
return r;
}
static UINT INSERT_close( struct tagMSIVIEW *view )
{
MSIINSERTVIEW *iv = (MSIINSERTVIEW*)view;
MSIVIEW *sv;
TRACE("%p\n", iv);
sv = iv->sv;
if( !sv )
return ERROR_FUNCTION_FAILED;
return sv->ops->close( sv );
}
static UINT INSERT_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
{
MSIINSERTVIEW *iv = (MSIINSERTVIEW*)view;
MSIVIEW *sv;
TRACE("%p %p %p\n", iv, rows, cols );
sv = iv->sv;
if( !sv )
return ERROR_FUNCTION_FAILED;
return sv->ops->get_dimensions( sv, rows, cols );
}
static UINT INSERT_get_column_info( struct tagMSIVIEW *view,
UINT n, LPWSTR *name, UINT *type )
{
MSIINSERTVIEW *iv = (MSIINSERTVIEW*)view;
MSIVIEW *sv;
TRACE("%p %d %p %p\n", iv, n, name, type );
sv = iv->sv;
if( !sv )
return ERROR_FUNCTION_FAILED;
return sv->ops->get_column_info( sv, n, name, type );
}
static UINT INSERT_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode, MSIRECORD *rec)
{
MSIINSERTVIEW *iv = (MSIINSERTVIEW*)view;
TRACE("%p %d %p\n", iv, eModifyMode, rec );
return ERROR_FUNCTION_FAILED;
}
static UINT INSERT_delete( struct tagMSIVIEW *view )
{
MSIINSERTVIEW *iv = (MSIINSERTVIEW*)view;
MSIVIEW *sv;
TRACE("%p\n", iv );
sv = iv->sv;
if( sv )
sv->ops->delete( sv );
msiobj_release( &iv->db->hdr );
msi_free( iv );
return ERROR_SUCCESS;
}
static UINT INSERT_find_matching_rows( struct tagMSIVIEW *view, UINT col,
UINT val, UINT *row, MSIITERHANDLE *handle )
{
TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
return ERROR_FUNCTION_FAILED;
}
MSIVIEWOPS insert_ops =
{
INSERT_fetch_int,
NULL,
NULL,
NULL,
INSERT_execute,
INSERT_close,
INSERT_get_dimensions,
INSERT_get_column_info,
INSERT_modify,
INSERT_delete,
INSERT_find_matching_rows
};
UINT INSERT_CreateView( MSIDATABASE *db, MSIVIEW **view, LPWSTR table,
column_info *columns, column_info *values, BOOL temp )
{
MSIINSERTVIEW *iv = NULL;
UINT r;
MSIVIEW *tv = NULL, *sv = NULL;
TRACE("%p\n", iv );
r = TABLE_CreateView( db, table, &tv );
if( r != ERROR_SUCCESS )
return r;
r = SELECT_CreateView( db, &sv, tv, columns );
if( r != ERROR_SUCCESS )
{
if( tv )
tv->ops->delete( tv );
return r;
}
iv = msi_alloc_zero( sizeof *iv );
if( !iv )
return ERROR_FUNCTION_FAILED;
/* fill the structure */
iv->view.ops = &insert_ops;
msiobj_addref( &db->hdr );
iv->db = db;
iv->vals = values;
iv->bIsTemp = temp;
iv->sv = sv;
*view = (MSIVIEW*) iv;
return ERROR_SUCCESS;
}