Add attribute index support for the sql queries in mapinfo tab format

[tamas]

Currently OGR has only a limited support for the attribute index scans with the SQL queries (added only for the shapefile format), although the index file format has been borrowed from the mapinfo driver. Moreover - with the mapinfo tab format - the index file may already exist which could just be used by the tab driver with modifications in the attached patch. In this case there's no need to create the index metadata file (.idm) since all this information has already been obtained from the corresponding .tab file.

[Even Rouault]

Tamas,

I've made the following change : r20105 /trunk/gdal/ogr/ogrsf_frmts/mitab/mitab_tabfile.cpp: Fix missing initializations that cause crashes

I believe that the files in ogr/ogrsf_frmts/mitab/ belong to the MITAB project, so you should submit the changes to the upstream project, otherwise they'll be lost at the next refresh

[tamas]

Applied in r20104 and r20105

Daniel,

Could you tell us how the changes done in OGR mitab and the upstream project are normally synchronized? I can see a couple of changes in OGR mitab as of the last update has been applied from the MITAB project.

[aboudreault]

I've committed this patch in mitab (Will be in mitab 2.0). I'll take care of synchronizing mitab upstream with gdal driver. Thanks tamas for the patch!