MS Access+update Oracle SQL database from excel file - vba

Question

We have a Front end app created in MS Access and a back-end supported by an Oracle database.
The users are required to upload an Excel file (around 6000 rows) every day and the process is done currently like this:
we have a temporary table where a VBA code is moving the excel data (the table is empty at every load)
once the file is uploaded another VBA code is pulling the data from that table and moves it using DAO to the server, line by line
The process takes a huge amount of time and we need to speed up the process.
The existing code with some adjustments and fields not presented here:
Public Function import_to_dwh_old_1() As Boolean
Dim rst As DAO.Recordset
Dim strSQL As String
Dim bol As Boolean
Dim strSQL_hr As Object
Dim rs As DAO.Recordset
Dim cnt As Integer
Dim i As Integer
Dim varReturn As Variant
Dim HR_ID As String
'######## 05/26/2019 - Fix to upload multiple times per day the HR file
db.Execute ("DELETE FROM DISPUTE_MGMT.DD_HR WHERE SNAPSHOT='" & Format(GetUTC(), "mm/dd/yyyy") & "'")
'######## End fix to upload ###########
bol = True
strSQL = "Select * FROM temp_hr"
Set rst = db.OpenRecordset(strSQL, dbOpenSnapshot)
Set rs = db.OpenRecordset("DISPUTE_MGMT_DD_HR")
rst.MoveLast
rst.MoveFirst
cnt = rst.RecordCount
i = 1
Do While Not rst.EOF
On Error GoTo capture_error
'varReturn = SysCmd(acSysCmdSetStatus, "Uploading dispute " & i & " out of " & cnt & " for snapshot [" & Format(GetUTC(), "mm/dd/yyyy") & "]")
rs.AddNew
rs!USER_NAME = Environ("USERNAME")
rs!IS_DELETED = 0
rs!DATE_CREATED = GetUTC()
rs!DATE_MODIFIED = GetUTC()
rs!SNAPSHOT = Format(GetUTC(), "mm/dd/yyyy")
rs!HR_ID = rst!ID
'### deleted fields from code
rs.Update
rst.MoveNext
i = i + 1
Loop
varReturn = SysCmd(acSysCmdSetStatus, " ")
import_to_dwh = True
Exit Function
capture_error:
Debug.Print Err.Description
MsgBox Err.Description & " - HR_ID = " & HR_ID
varReturn = SysCmd(acSysCmdSetStatus, " ")
import_to_dwh = False
Exit Function
End Function
The new idea is more direct but I am not sure how to use in the same time a MS Access table and a SQL database table in the same statement
Public Function import_to_dwh() As Boolean
Dim qdf As DAO.QueryDef, rst As DAO.Recordset
Dim strSQL As String
On Error GoTo Error_Handler
Set qdf = CurrentDb.CreateQueryDef("")
If env = "prod" Then
qdf.Connect = prod_credentials
Else
qdf.Connect = dev_credentials
End If
'Delete current snapshot
qdf.SQL = "DELETE FROM DISPUTE_MGMT.DD_HR WHERE SNAPSHOT='" & Format(GetUTC(), "dd-mmm-yyyy") & "';"
Debug.Print qdf.SQL
qdf.ReturnsRecords = False
qdf.Execute
qdf.SQL = "INSERT INTO DISPUTE_MGMT.DD_HR (USER_NAME, IS_DELETED, DATE_CREATED, DATE_MODIFIED, SNAPSHOT, HR_ID) SELECT '" & Environ("USERNAME") & "', 0, to_date('" & GetUTC() & "','mm/dd/yyyy hh:mi:ss am'), to_date('" & GetUTC() & "','mm/dd/yyyy hh:mi:ss am'), " _
& "'" & Format(GetUTC(), "dd-mmm-yyyy") & "', ID FROM temp_hr;"
Debug.Print qdf.SQL
qdf.ReturnsRecords = False
qdf.Execute
Error_Handler_Exit:
On Error Resume Next
If Not rst Is Nothing Then
rst.Close
Set rst = Nothing
qdf.Close
Set qdf = Nothing
End If
import_to_dwh = True
'If Not db Is Nothing Then Set db = Nothing
Exit Function
Error_Handler:
MsgBox "The following error has occured" & vbCrLf & vbCrLf & _
"Error Number: " & Err.Number & vbCrLf & _
"Error Source: " & vbCrLf & _
"Error Description: " & Err.Description & _
Switch(Erl = 0, "", Erl <> 0, vbCrLf & "Line No: " & Erl) _
, vbOKOnly + vbCritical, "An Error has Occured!"
Dim L As Long
For L = 0 To Errors.Count - 1
Debug.Print Errors(L) & " - " & Errors(L).Description
Next
import_to_dwh = False
Resume Error_Handler_Exit
End Function
Obviously, the second method does not work.. Could someone point me to the right direction?
Thank you!