-- One-time install step: change log for products created and costs changed
-- by the invoice parser. Read by the Changes page.
-- Run as a login with CREATE TABLE rights on posbdat (not the app's limited login).
-- Safe to re-run: the table is only created when missing.
USE posbdat;
GO

IF OBJECT_ID('dbo.InvoiceProductChanges', 'U') IS NULL
BEGIN
    CREATE TABLE dbo.InvoiceProductChanges (
        ChangeID      int IDENTITY(1,1) NOT NULL PRIMARY KEY,
        ChangeDate    datetime      NOT NULL DEFAULT GETDATE(),
        ChangeType    varchar(10)   NOT NULL,   -- NEW = product created, COST = cost change
        UPC           varchar(13)   NOT NULL,
        Description   varchar(30)   NULL,
        Vendor        varchar(20)   NULL,
        InvoiceNumber varchar(100)  NULL,
        PONumber      varchar(12)   NULL,       -- NULL for NEW: the PO is assigned at save
        BatchNo       varchar(25)   NULL,
        OldCost       decimal(12,4) NULL,
        NewCost       decimal(12,4) NULL,
        Retail        decimal(12,4) NULL,
        Pack          decimal(12,2) NULL,
        EmpNo         int           NULL
    );
    CREATE INDEX IX_InvoiceProductChanges_ChangeDate ON dbo.InvoiceProductChanges (ChangeDate);
END
GO

-- The app's login needs to write and read it. Replace <app_login> and run.
-- GRANT SELECT, INSERT ON dbo.InvoiceProductChanges TO [<app_login>];