• Article Type: General
• Product: Aleph
• Product Version: 20

Description:
We want to find all cases where a record has wcn Word index entries *regardless* of the value. But wcn=? gives us "Error parsing find request".

"wrd=?" , wti=?", etc., also give this error.

Resolution:
The "?" truncation symbol can not be used by itself. If the fields sent to the wcn index always begin with a number, then the following search could be used:

wcn= (0? or 1? or 2? or 3? or 4? or 5? or 6? or 7? or 8? or 9?)

If the fields sent to the wcn index can begin with numbers *or* letters, you include letters too:

wcn= (0? or 1? or 2? or 3? or 4? or 5? or 6? or 7? or 8? or 9? or a? or b? or c? or d?) <etc.>

Please note that the performance of bases with severe truncation (-- as these are --) can be very poor. This issue is described in KB 8192-471. It might be OK for a very small library, such as a Course Reserves library, but never for a bib library.

The solution in that case is to create a TYP field via tab_type_config which will generate a "TYP" with value "Course" if a CNO field exists:

1. in tab_expand

WORD expand_doc_type tab_type_config.eng


2. in tab_type_config.eng

TYP Course CNO EXIST


3. in tab11_word index the typ field to the WTYP index:

TYP## 03 WTYP


Then make a base where wtyp=course .

• Article last edited: 10/8/2013