Using OUTPUT clause to insert value not in INSERTED

Question

I am writing a stored procedure to process a table belonging to an application and insert values into a table belonging to the same application (so I cannot amend either table).

I have to process only new records and remember which records have been processed, for this I have created a third simple table.

Tables are below, many columns removed to leave only important details.

Source Table

CREATE TABLE [dbo].[DETAIL](
    [DET_NET] [float] NULL,
    [DET_VAT] [float] NULL,
    [DET_VATCODE] [varchar](4) NULL,
    [DET_GROSS] [float] NULL,
    [DET_DATE] [datetime] NULL,
    [DET_PRIMARY] [float] NOT NULL
)

Target Table

CREATE TABLE [dbo].[TRN_TEMP](
    [TRN_TRAN_DATE] [datetime] NULL,
    [TRN_DESCRIPTION] [varchar](20) NULL,
    [TRN_PRIMARY] [int] NULL,
    [TRN_AMT] [float] NULL
)

Tracking Table

CREATE TABLE REGISTER(
    LINE_ID INT IDENTITY(1,1) PRIMARY KEY CLUSTERED NOT NULL,
    DET_PRIMARY_LINK FLOAT NOT NULL,
    INS_DATE DATETIME NOT NULL
)

I am trying to insert into the Target table values from the source table, but also insert the primary key of the source table into the tracking table.

INSERT INTO TRN_TEMP (TRN_TRAN_DATE, TRN_DESCRIPTION, TRN_AMT)
OUTPUT D.DET_PRIMARY, GETDATE() INTO REGISTER (DET_PRIMARY_LINK, INS_DATE)
SELECT D.DET_DATE, 'SOMETEXT', SUM(D.DET_NET)
FROM DETAIL D
LEFT JOIN REGISTER R ON D.DET_PRIMARY = R.DET_PRIMARY_LINK
WHERE <MY CONDITIONS> AND R.LINE_ID IS NULL -- TO REMOVE LINES ALREADY PROCESSED
GROUP BY D.DET_DATE

I can't see a problem with the text above but I get an error "The multi part identifier 'D.DET_PRIMARY' could not be bound.". I've tried both D.DET_DETAIL and DETAIL.DET_DETAIL and the error is the same.

Is it not possible to use values from the source table in the OUTPUT clause when using a group or do I have an error in the formatting? If it's not possible is there another way of keeping track of which lines I have processed?

Answer 1

Use MERGE instead of INSERT:

MERGE
INTO    trn_temp d
USING   (
        SELECT  D.DET_DATE, 'SOMETEXT' AS sometext, SUM(D.DET_NET) AS the_sum
        ...
        ) s
ON      (1 = 0)
WHEN NOT MATCHED THEN
INSERT  (TRN_TRAN_DATE, TRN_DESCRIPTION, TRN_AMT)
VALUES  (det_date, sometext, the_sum)
OUTPUT  s.*

Update:

To work around the GROUP BY problem, use this:

DECLARE @tmp TABLE
        (
        det_primary INT NOT NULL PRIMARY KEY
        )

MERGE
INTO    register r
USING   detail d
ON      (r.det_primary_link = d.det_primary)
WHEN NOT MATCHED THEN
INSERT  (det_primary_link, ins_date)
VALUES  (det_primary, GETDATE())
OUTPUT  d.det_primary
INTO    @tmp;

INSERT
INTO    trn_temp (trn_tran_date, trn_description, trn_amt)
OUTPUT  INSERTED.*
SELECT  det_date, 'sometext', SUM(det_net)
FROM    @tmp t
JOIN    detail d
ON      d.det_primary = t.det_primary
GROUP BY
        det_date