Wonderware Historian Extension table

mony9909

Member
Join Date
Apr 2022
Location
United Kingdom
Posts
11
Hi all,

I found some interesting issue from my Wonderware environment. At my Trend table option, if i select "both", the Trend table is not showing anything. But when i select "Extension table", the Trend table is working perfectly.

I just want to know why, because option "both" should retrieve data from both the manual and extension table.

Please find the attached table for your reference.

photo_2022-05-12_09-31-12.jpg
 
I have seen this when the Historian RUNTIME database's SQL collation does not exactly match the SQL server collation. This causes issues when the UNION statement tries to combine the data.
 

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