data-dwh-dbt-project/models/intermediate/cross/int_dates_mtd.sql

{{ config(materialized="table", unique_key="date") }}

with
    int_dates as (select * from {{ ref("int_dates") }} where date_day >= {{ var("start_date") }}),
    raw_dates as (
        select
            id.year_number as year,
            id.month_of_year as month,
            id.day_of_month as day,
            id.date_day as date,
            id.month_start_date as first_day_month,
            id.month_end_date as last_day_month,
            now()::date as today
        from int_dates id
    )
-- Dates keeps only end of month (EOM) dates, as well as
-- dates corresponding to the current month and the same month last year
select distinct
    rd.year,
    rd.month,
    rd.day,
    rd.date,
    rd.first_day_month,
    rd.last_day_month,
    case when rd.date = rd.last_day_month then 1 else 0 end as is_end_of_month,
    case
        when date_trunc('month', rd.date) = date_trunc('month', rd.today) then 1 
        -- If today is 1st of Month, include last day of month for MTD display
        when rd.today = rd.last_day_month + 1 then 1
        else 0
    end as is_current_month
from raw_dates rd
where
    rd.today > rd.date
    -- include only up-to yesterday
    and (
        rd.date = rd.last_day_month
        -- keep all last day of the month
        or rd.date >= date_trunc('month', rd.today)
        -- keep all individual days of the current month
        or (
            rd.year = extract(year from rd.today) - 1
            and rd.month = extract(month from rd.today)
            and rd.day < extract(day from rd.today)
        )
    -- keep all days of same month last day up to yesterday's day
    )