Empty quoted data consumes next cell

[cstiborg]

I have a postgres csv file which contains a number of quoted empty cells like the following:
"cell1","","cell3",NULL,"cell5"

In this case, despite five fields are present in the row, only four will be seen:

• "cell1"
• "","cell3"
• NULL
• "cell5"

I've made a patch for this copied in below. In the patched line I amend the check for an escape sequence to also validate that last_quote_location wasn't the first character of the cell and the following character isn't a delimiter. I.e. that we don't have a cell like the second cell above.

csv2.patch