[REVIEW 3-6][REVIEW 3-6-1] Fix for fdo#53640 - Pivot table from database source

[Kohei Yoshida]

Hi there,

I'd like

https://gerrit.libreoffice.org/gitweb?p=core.git;a=commitdiff;h=f4ed9a5adbea3de88870ff4f5cb202bd606e0746

cherry-picked to 3-6 and preferably to 3-6-1 as well.  This fixes

https://bugs.freedesktop.org/show_bug.cgi?id=53640

It's a safe fix in that, the pivot table currently doesn't work at all 
when pulling data from database source.  So, it'd be near impossible to 
make it any worse.

Also, optionally I'd like

https://gerrit.libreoffice.org/gitweb?p=core.git;a=commitdiff;h=88979ef6ffe7921200311513d6601f9c5d582a42

backported as well.  Leaving this code in would result in re-populating 
the pivot cache twice unnecessarily, which would degrade performance.

Kohei

-- 
Kohei Yoshida, LibreOffice hacker, Calc