Accepted Solutions
Hi Michael,
I did a bad screenshot job there. Good catch. 😃 I was copy/pasting actions in order to make the screenshot more clear since the actual actions I was using weren't on the same subflows. I've updated my reply from earlier with a corrected screenshot. I'll show here as well.
For that original screenshot (the incorrect one), if I had run it, I believe it would have given a different error anyway. It would probably have said that the ExcelData variable didn't contain a property called ColumnHeadersRow since by that point in the flow, it hadn't been assigned as a DataTable.
Here's the correct screenshot and also including the error. I've since found and also VJR confirmed it's just an issue with DataTables when they're received from SQL Server (or probably any time you do a SQL query). I'll be submitting this in the I Found A Bug section. Thanks for your help!
Hi Dave,
I am using 2.17.xx and below is the output for ColumnHeadersRow
Datatable coming after reading Excel (in my case has no headers, just an example)
Could there be some kind of unwanted character in the header row which is failing it to evaluate?
Try giving some meaningful headers and re-running the same to drill down the issue further.
Do share your findings.
The issue may have to do with DataTables created by querying SQL Server. If I read a DataTable in from Excel, the ColumnHeadersRow property works. But if I get the same DataTable from SQL Server, I get the failed to evaluate error.
I tested this to make sure by first querying SQL Server and tested using Set Variable like %QueryResult.ColumnHeadersRow%. PAD shows the QueryResult as a DataTable, but the property doesn't work. I then tested having PAD query SQL Server to get a DataTable then write that DataTable into Excel then read the same DataTable from Excel and then the property works. There must be a difference in the structure of a DataTable when it comes from Excel vs from SQL Server.
Anyone have any suggestions there? Let me know if what I'm saying doesn't make sense. I'll try to put some screenshots below.
Here's my querying SQL Server and then trying to access the ColumnHeadersRow property. This fails and gives the error I indicated earlier saying failed to evaluate.
(Edit Feb 28th: I replaced the below screenshot with a correct screenshot. Before, it showed an example of what I was doing, but it was just a bad screenshot prep that I did so this correct one shows the real code/actions with the error.)
And here's my getting data from Excel and then accessing the ColumnHeadersRow property. This succeeds. Note that the column names are exactly the same. The reason I know they are is that the Excel spreadsheet is created after querying SQL Server, so the column header row "should be" exactly the same between SQL Server and Excel. The difference is that it works when read in from Excel and not from SQL Server.
I should also mentioned I tested this on a different SQL Server database table that has no special characters such as underscores. It's purely capital and lowercase letters in the names of all the columns/fields, and it also produces the same error.
Tried with an SQL table
You are right about the error.
You might want to submit the bug in the I Found A Bug section.
Hi Michael,
I did a bad screenshot job there. Good catch. 😃 I was copy/pasting actions in order to make the screenshot more clear since the actual actions I was using weren't on the same subflows. I've updated my reply from earlier with a corrected screenshot. I'll show here as well.
For that original screenshot (the incorrect one), if I had run it, I believe it would have given a different error anyway. It would probably have said that the ExcelData variable didn't contain a property called ColumnHeadersRow since by that point in the flow, it hadn't been assigned as a DataTable.
Here's the correct screenshot and also including the error. I've since found and also VJR confirmed it's just an issue with DataTables when they're received from SQL Server (or probably any time you do a SQL query). I'll be submitting this in the I Found A Bug section. Thanks for your help!
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