Delete invalid and old discounts and make the code unique (#338)

* WIP * WIP - will organize code later * Remove redundant view * 🎨 Fix typo * Cleanup * Fix invalid column references * Ensure start date is before end date on INSERT or UPDATE * Fix migration number
2023-10-13 13:32:14 +02:00
parent 42ab936987
commit 664c89b774
1 changed files with 76 additions and 0 deletions
@@ -0,0 +1,76 @@
 -- ============================================================================
 -- Delete unused discount codes older than 2023-01-01 or having invalid dates.
 -- ============================================================================
 DELETE  FROM discount_code_filters
 WHERE  discount_code_id IN (
            SELECT  discountid
              FROM  discount_codes
             WHERE  (SELECT COUNT(*) FROM order_rows s WHERE s.sub_type = 'discount_code' AND s.data ->> 'code' = code) = 0
               AND  ("end" < '2023-01-01' OR  start > "end")
        );
 DELETE  FROM discount_codes
 WHERE  discountid IN (
            SELECT  discountid
              FROM  discount_codes dc
             WHERE  (SELECT COUNT(*) FROM order_rows s WHERE s.sub_type = 'discount_code' AND s.data ->> 'code' = code) = 0
               AND  ("end" < '2023-01-01' OR start > "end")
        );
 -- ============================================================================
 -- Delete discounts with codes occuring more than once.
 -- Keep the latest inserted.
 -- ============================================================================
 CREATE INDEX IF NOT EXISTS ix_discount_codes_discountid_lower_code ON discount_codes (discountid, LOWER(code));
 DELETE  FROM discount_code_filters
 WHERE  NOT discount_code_id IN (
            SELECT  discountid
              FROM  discount_codes dc
             WHERE  discountid = (
                        SELECT  MAX(discountid)
                          FROM  discount_codes dcs
                         WHERE  LOWER(dc.code) = LOWER(dcs.code)
                    )
        );
 DELETE  FROM discount_codes
 WHERE  NOT discountid IN (
            SELECT  discountid
              FROM  discount_codes dc
             WHERE  discountid = (
                        SELECT  MAX(discountid)
                          FROM  discount_codes dcs
                         WHERE  LOWER(dc.code) = LOWER(dcs.code)
                    )
        );
 DROP INDEX IF EXISTS ix_discount_codes_discountid_lower_code;
 -- ============================================================================
 -- Make existing codes lower cased.
 -- ============================================================================
 -- Keep existing updated timestamps
 DROP TRIGGER IF EXISTS updated_timestamp ON public.discount_codes;
 UPDATE  discount_codes
   SET  code = LOWER(code);
 CREATE TRIGGER updated_timestamp
    BEFORE UPDATE
    ON public.discount_codes
    FOR EACH ROW
    EXECUTE FUNCTION public.updated_timestamp();
 -- ============================================================================
 -- Make code unique.
 -- ============================================================================
 CREATE UNIQUE INDEX IF NOT EXISTS uix_discount_codes_lower_code ON discount_codes (LOWER(code));
 -- ============================================================================
 -- Ensure start date is before end date.
 -- ============================================================================
 ALTER TABLE discount_codes
  ADD CONSTRAINT date_range_check
 CHECK (start <= "end");