USE CanvasWarehouse
GO

IF 
	OBJECT_ID(N'[dbo].[Canvas-course_score_dim-staging]', N'U') IS NOT NULL
BEGIN
	DROP TABLE [dbo].[Canvas-course_score_dim-staging]
END
;

CREATE TABLE [dbo].[Canvas-course_score_dim-staging]
(
	id bigint NOT NULL
	, canvas_id bigint NOT NULL
	, enrollment_id bigint NOT NULL
	, created_at varchar(max) NULL
	, updated_at varchar(max) NULL
	, workflow_state varchar(256) NOT NULL
)
GO

BULK INSERT [dbo].[Canvas-course_score_dim-staging]
FROM
	'G:\Canvas\unpackedFiles\course_score_dim.txt'
WITH
	(
		FIRSTROW = 2
		, FIELDTERMINATOR = '\t'
		--, ROWTERMINATOR = '\r\n'
		-- This is due to unix encoding, the row terminator is not \n
		, ROWTERMINATOR = '0x0A'
		, KEEPNULLS
	)
GO

IF 
	OBJECT_ID(N'[dbo].[Canvas-course_score_dim]', N'U') IS NOT NULL
BEGIN
	DROP TABLE [dbo].[Canvas-course_score_dim]
END
;

CREATE TABLE [dbo].[Canvas-course_score_dim]
(
	id bigint NOT NULL
	, canvas_id bigint NOT NULL
	, enrollment_id bigint NOT NULL
	, created_at datetime NULL
	, updated_at datetime NULL
	, workflow_state varchar(256) NOT NULL
)
GO

INSERT INTO [dbo].[Canvas-course_score_dim]
SELECT
	id
	, canvas_id
	, enrollment_id
	, CASE
		WHEN created_at IS NULL THEN NULL
		WHEN LEFT(created_at, 4) < 1900 THEN NULL
		ELSE CAST(created_at AS datetime)
		END as created_at
	, CASE
		WHEN updated_at IS NULL THEN NULL
		WHEN LEFT(updated_at, 4) < 1900 THEN NULL
		ELSE CAST(updated_at AS datetime)
		END as updated_at
	, workflow_state
FROM
	[dbo].[Canvas-course_score_dim-staging]

IF 
	OBJECT_ID(N'[dbo].[Canvas-course_score_dim-staging]', N'U') IS NOT NULL
BEGIN
	DROP TABLE [dbo].[Canvas-course_score_dim-staging]
END
;