MobileRead Forums - View Single Post

tadas · 04-19-2015, 08:41 PM

I have a user-defined field, #kindlecollections, that I use to maintain categories in conjunction with the Kindle Collections plugin. It's defined as comma-separated text. I want to search and create a virtual library with all books in the library where this field is not defined. The following are among the things I've tried that don't work:

#kindlecollections:" "
#kindlecollections:""
#kindlecollections = " "
#kindlecollections EQ " "

Reading http://manual.calibre-ebook.com/regexp.html was not helpful.

I've used grep and cousins and various kinds of SQL for a third of a century, and I'm frustrated. I don't need the concepts explained; I need a pointer to the *exact* syntax.

04-19-2015, 08:41 PM	#1
tadas Member Posts: 21 Karma: 10 Join Date: Dec 2009 Device: Kindle	Searching for empty I have a user-defined field, #kindlecollections, that I use to maintain categories in conjunction with the Kindle Collections plugin. It's defined as comma-separated text. I want to search and create a virtual library with all books in the library where this field is not defined. The following are among the things I've tried that don't work: #kindlecollections:" " #kindlecollections:"" #kindlecollections = " " #kindlecollections EQ " " Reading http://manual.calibre-ebook.com/regexp.html was not helpful. I've used grep and cousins and various kinds of SQL for a third of a century, and I'm frustrated. I don't need the concepts explained; I need a pointer to the exact syntax.