SSIS Variable Date Failing between SQL Server and ORACLE - sql

Question

Good Afternoon All,
I have spent about 6 hours trying to get formatting to work through SSIS using a Max Date Variable to identify into a where clause - Just have no luck!
I have created a variable called my_date which fetched the Max(Date) from a local SQL server table to understand the last load point for that table - using the below code:
SELECT CAST(FORMAT(MAX(Business_Date), 'dd-MMM-yyyy') AS varchar) AS my_date FROM Table
This fetches the date correctly as 17-Sep-2018.
I have then mapped my result set as my_date -> User::max_date
I have set my max_date variable to a string data type under the package scope.
I have tested my variable out by using breakpoints to ensure this runs all the way through in the correct format - and this works 100%.
I then have a data flow task running to fetch data from my ORACLE DB to insert into my SQL Server table which contains the following SQL command:
SELECT *
FROM Table2
WHERE (BUSINESS_DATE > to_date('#[User::max_date]', 'DD-MON-YYYY'))
However I get the ORA-01858 - [TABLE] Error: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80040E07.
An OLE DB record is available. Source: "Microsoft OLE DB Provider for Oracle" Hresult: 0x80040E07 Description: "ORA-01858: a non-numeric character was found where a numeric was expected
".
If I go and replace my variable directly with the contents of the variable shown by the breakpoint in locales it works perfectly!
I have attempted multiple format types from the initial export through to the final where clause and this seems to be the closest I have come to pushing it through but it is still complaining about format.
Please help - Images below to help see setup.
Control Flow - displaying the execute SQL and the data flow task
Locale showing Variable is inserting after breakpoint is reached

Answer 1

Managed to get it working!
By adding an intermediary variable where the value and expression contains the following:
"SELECT *
FROM TABLE
WHERE (BUSINESS_DATE > to_date('"+#[User::max_date]+"' , 'DD-MON-YYYY'))"
I then amended my source OLEDB to SQL Command from variable and selected the above variable created and it worked perfectly!

Answer 2

Try mapping your user parameter in the "OLE DB Data Source Editor", under "Parameters".
1) Change SQL Command Text (change #[User::max_date] to ?), like this:
SELECT *
FROM Table2
WHERE (BUSINESS_DATE > to_date('?', 'DD-MON-YYYY'))
2) Then in the parameter editor, map parameter 1 to #[User::max_date].
https://learn.microsoft.com/en-us/sql/integration-services/data-flow/map-query-parameters-to-variables-in-a-data-flow-component?view=sql-server-2017
Also, the "Oracle Provider for OLE DB" behaves differently than the "Microsoft OLE DB Provider for Oracle", so it depends which you are using.