--DROP VIEW IF EXISTS vw_bi_fct_open_position;    

CREATE OR REPLACE VIEW vw_bi_fct_open_position 

AS

    WITH purchase_position AS (
        SELECT 
            Contracts."intTradeId",
            Contracts."Trade Category",
            Contracts."Trade Type",
            Contracts."Delivery Date",   
            TO_CHAR(Contracts."Delivery Date", 'YYYY-MM') AS "delivery_month",
            TO_CHAR(Contracts."Delivery Date", 'Mon YYYY') AS "delivery_month_label",
            Contracts."Quantity",
            Contracts."Quantity" - COALESCE( Delivery."delivered_quantity" , 0 ) AS "Open Position Quantity"
        FROM vw_bi_fct_trade_line AS Contracts
        LEFT JOIN (
            -- Deduct delivered quantities   
            SELECT 
                FFE."inTradeId",
                SUM(FFE."Quantity") AS "delivered_quantity"
            FROM vw_bi_fct_trade_fulfillment_event AS FFE
            WHERE FFE."Trade Category" = 'Physical'
              AND FFE."Trade Type" = 'Purchase'
            GROUP BY 
                FFE."inTradeId"
        ) AS Delivery ON Contracts."intTradeId" = Delivery."inTradeId"
        WHERE 1=1
        AND Contracts."Trade Category" = 'Physical'
        AND Contracts."Trade Type" = 'Purchase'
    )
    ,sale_position AS (
        SELECT 
            Contracts."intTradeId",
            Contracts."Trade Category",
            Contracts."Trade Type",
            Contracts."Delivery Date",   
            TO_CHAR(Contracts."Delivery Date", 'YYYY-MM') AS "delivery_month",
            TO_CHAR(Contracts."Delivery Date", 'Mon YYYY') AS "delivery_month_label",            
            Contracts."Quantity",
            (Contracts."Quantity" - COALESCE( Delivery."delivered_quantity" , 0 ) ) * (-1) AS "Open Position Quantity"
        FROM vw_bi_fct_trade_line AS Contracts
        LEFT JOIN (
            -- Deduct delivered quantities
            SELECT 
                FFE."inTradeId",
                SUM(FFE."Quantity") AS "delivered_quantity"
            FROM vw_bi_fct_trade_fulfillment_event AS FFE
            WHERE FFE."Trade Category" = 'Physical'
              AND FFE."Trade Type" = 'Sale'
            GROUP BY
                FFE."inTradeId"
        ) AS Delivery ON Contracts."intTradeId" = Delivery."inTradeId"
        WHERE 1=1
        AND Contracts."Trade Category" = 'Physical'
        AND Contracts."Trade Type" = 'Sale'
    )

    SELECT *
    FROM purchase_position
    
    UNION ALL

    SELECT *
    FROM sale_position;

    
ALTER TABLE public.vw_bi_fct_open_position
    OWNER TO postgres;