When you hover the column headers there are additional information including the index of the actual column.
To search, right-click the table header and choose "Find Column". Use "*" as wildcard. To jump between the matches use left/right arrow key.
Thanks for pointing that out. Excatly what I need. Sorry for having bothered you.
I often find my self for scanning the data grid back and forth for a specific column. It would really be helpful if one had the column id displayed in the column header (maybe like a water mark) or even better if one had a text box to look for the column by name regexp (in case of success automatically scrolling to the first hit).