Updated "delete+insert" incremental strategy macros

[aosingh]

The delete+insert incremental strategy does the following in each incremental run

1. Select new records using the WHERE clause

create global temporary table o$pt_us_product_delete_insert120225489099
on commit preserve rows
as
select {{ model_sql }}
AND times.calendar_month_desc > (SELECT MAX(calendar_month_desc) FROM dbt_test.us_product_delete_insert)

2. Delete existing records from destination table based on matching unique keys

DELETE FROM dbt_test.us_product_delete_insert DBT_INTERNAL_DEST
  WHERE ( DBT_INTERNAL_DEST.PROD_NAME ,  DBT_INTERNAL_DEST.GROUP_ID)
  IN    ( SELECT  DBT_INTERNAL_SOURCE.PROD_NAME , DBT_INTERNAL_SOURCE.GROUP_ID 
          FROM o$pt_us_product_delete_insert120225489099 DBT_INTERNAL_SOURCE)

3. Insert newly selected records

insert  /*+parallel(4)*/  into  dbt_test.us_product_delete_insert (PROD_NAME, CHANNEL_DESC, CALENDAR_MONTH_DESC, GROUP_ID, SALES$, DEFAULT_RANK, CUSTOM_RANK)
(select PROD_NAME, CHANNEL_DESC, CALENDAR_MONTH_DESC, GROUP_ID, SALES$, DEFAULT_RANK, CUSTOM_RANK
 from o$pt_us_product_delete_insert120225489099)