Question
I am using IronPython to create a data array and I need to insert this array to MS SQL Server. The .Net class I'm using is SqlBulkCopy (part of System.Data.SqlClient).
I have found this StackOverflow article quite useful SqlBulkCopy from a list
However, since I'm only starting to learn python I'm having difficulties recreating this C# example with Python code.
Here's what I have so far
import clr
clr.AddReference('System.Data')
from System.Data import *
import clr
clr.AddReference('System')
from System import *
sqlDbConnection = SqlClient.SqlConnection("<my-db-connection-string>")
sqlDbConnection.Open()
myDataArray = [
[Byte(7), Byte(8), Int32(1), Byte(15), Byte(12), Single(0.34324)],
[Byte(5), Byte(1), Int32(2), Byte(11), Byte(10), Single(0.77362)],
[Byte(9), Byte(2), Int32(3), Byte(12), Byte(9), Single(0.93394)]]
sqlDbConnection.Close()
The idea is to generate a large data array (say > 1 Million rows) and import it to my table using bulk copy method. I would really appreciate if anyone could shed a light on this and explain how I could tackle this and how I can make use of all the options that come with the bulk copy class. SqlBulkCopy msdn reference
I have been looking for useful examples in Python but did not find any so far...
Much appreciated
Accepted Answer
Finally got my head around this one, hope this proves helpful:
import clr
clr.AddReference('System.Data')
from System.Data import SqlClient
from System.Data import *
from System.Data import DataTable
import clr
clr.AddReference('System')
from System import *
from System import Console
from System import Data
sqlConnectionString = "<sql-connection-string>"
sqlDbConnection = SqlClient.SqlConnection(sqlConnectionString)
sqlDbConnection.Open()
workTable = DataTable()
workTable.Columns.Add("Col1", Byte)
workTable.Columns.Add("Col2",Byte)
workTable.Columns.Add("Col3", Int32)
workTable.Columns.Add("Col4", Byte)
workTable.Columns.Add("Col5", Byte)
workTable.Columns.Add("Col6", Single)
sampleArray = [Byte(7), Byte(8), Int32(1), Byte(15), Byte(12), Single(0.34324)]
for i in range (0, 189000) :
workTable.Rows.Add(Array[object](sampleArray))
cmd = SqlClient.SqlCommand("truncate table dbo.MyTable", sqlDbConnection);
def bulkLoadEsgData ():
sbc = SqlClient.SqlBulkCopy(sqlConnectionString, SqlClient.SqlBulkCopyOptions.TableLock, BulkCopyTimeout=0, DestinationTableName="dbo.MyTable")
sbc.WriteToServer(workTable)
# Start simulation
Console.WriteLine("Enter number of simulations (1 simulation = 189,000 data rows):"+"\n")
strN = Console.ReadLine()
n = int(strN)
cmd.ExecuteNonQuery()
for i in range (0, n):
bulkLoadEsgData()
sqlDbConnection.Close()
Environment.Exit(1111)