I am using a straight-forward \pgfplotstabletypeset.
Because I wanted to insert a manual break in one of the cells to decrease the width of that cell, I added a \pbox as suggested in https://tex.stackexchange.com/a/11555
The problem is that the resulting height is a little bit too small for my taste:

As you can see, "some" is at the very top of the cell and "text" at the very bottom. I'd like to have a small extra space at the top and at the bottom.
I was not able to achieve this with the stuff I tried.
Any ideas?
Here is the minimal working example that shows the problem:
\documentclass[11pt,a4paper]{article}
\usepackage{booktabs}
\usepackage{colortbl}
\usepackage{pgfplotstable}
\pgfplotstableset{
column type=l,
every head row/.style={
before row=\toprule,
after row=\midrule},
every even row/.style={before row={\rowcolor[gray]{0.85}}},
every odd row/.style={before row={\rowcolor[gray]{0.95}}},
every last row/.style={
after row=\bottomrule},
col sep = &,
row sep=\\,
string type,
}
\usepackage{pbox}
\begin{document}
\begin{table}[h]
\pgfplotstabletypeset{
a & b \\
1 & 2 \\
\pbox[c]{20cm}{some \\ long \\ text} & foo \\
3 & 4 \\
}
\end{table}
\end{document}
Bernard, thank you for your suggestion that you posted below.
There is a problem, however, when longer lines are present in the table.
Please add the following row to the minimal working example that you posted:
\makecell{some even longer \\ text that spans \\ three lines} & foo \\
This will result in the following table:

You said that the same resulting table can be obtained without pgfplotstable. That's fine with me - If you have a suggestion how to do it differently, I'm open to use that as well.
Note to Paul Gaborit: I posted my original question as an anonymous user, so I cannot comment on my own or any other comment when I come back to this page, or?
