Reset When

Translation reference to convert Teradata Reset When functionality to Snowflake

Description

Reset When determines the partition on which an SQL window function operates based on some specific condition. If the condition evaluates to True, a new dynamic sub partition is created within the existing window partition. For more information about Reset When, see the Teradata documentation.

Sample Source Patterns

Sample data

Teradata

IN -> Teradata_01.sql

CREATE TABLE account_balance
( 
  account_id INTEGER NOT NULL,
  month_id INTEGER,
  balance INTEGER
) 
UNIQUE PRIMARY INDEX (account_id, month_id);

INSERT INTO account_balance VALUES (1, 1, 60);
INSERT INTO account_balance VALUES (1, 2, 99);
INSERT INTO account_balance VALUES (1, 3, 94);
INSERT INTO account_balance VALUES (1, 4, 90);
INSERT INTO account_balance VALUES (1, 5, 80);
INSERT INTO account_balance VALUES (1, 6, 88);
INSERT INTO account_balance VALUES (1, 7, 90);
INSERT INTO account_balance VALUES (1, 8, 92);
INSERT INTO account_balance VALUES (1, 9, 10);
INSERT INTO account_balance VALUES (1, 10, 60);
INSERT INTO account_balance VALUES (1, 11, 80);
INSERT INTO account_balance VALUES (1, 12, 10);

account_id	month_id	balance
1	1	60
1	2	99
1	3	94
1	4	90
1	5	80
1	6	88
1	7	90
1	8	92
1	9	10
1	10	60
1	11	80
1	12	10

Snowflake

OUT -> Teradata_01.sql

CREATE OR REPLACE TABLE account_balance (
  account_id INTEGER NOT NULL,
  month_id INTEGER,
  balance INTEGER,
  UNIQUE (account_id, month_id)
)
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"teradata"}}'
;

INSERT INTO account_balance
VALUES (1, 1, 60);

INSERT INTO account_balance
VALUES (1, 2, 99);

INSERT INTO account_balance
VALUES (1, 3, 94);

INSERT INTO account_balance
VALUES (1, 4, 90);

INSERT INTO account_balance
VALUES (1, 5, 80);

INSERT INTO account_balance
VALUES (1, 6, 88);

INSERT INTO account_balance
VALUES (1, 7, 90);

INSERT INTO account_balance
VALUES (1, 8, 92);

INSERT INTO account_balance
VALUES (1, 9, 10);

INSERT INTO account_balance
VALUES (1, 10, 60);

INSERT INTO account_balance
VALUES (1, 11, 80);

INSERT INTO account_balance
VALUES (1, 12, 10);