IF

Translation reference to convert Teradata IF statement to Snowflake Scripting

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Some parts in the output code are omitted for clarity reasons.

Description

Provides conditional execution based on the truth value of a condition.

For more information regarding Teradata IF, check here.

IF conditional_expression THEN
     statement
     [ statement ]... 
[ ELSEIF conditional_expression THEN
     statement
     [ statement ]... ]...
[ ELSE   
     statement
     [ statement ]... ]
END IF;

Sample Source Patterns

Sample auxiliar table

IN -> Teradata_01.sql
CREATE TABLE if_table(col1 varchar(30));

Possible IF variations

Teradata

IN -> Teradata_02.sql
CREATE PROCEDURE ifExample1 ( flag NUMBER )
BEGIN
   IF flag = 1 THEN
      INSERT INTO if_table(col1) VALUES ('one');
   END IF;
END;

CALL ifExample1(1);
SELECT * FROM if_table;
|COL1|
|----|
|one |

Snowflake Scripting

OUT -> Teradata_02.sql
CREATE OR REPLACE PROCEDURE ifExample1 (FLAG NUMBER(38, 18))
RETURNS VARCHAR
LANGUAGE SQL
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"teradata"}}'
EXECUTE AS CALLER
AS
$$
   BEGIN
      IF (:flag = 1) THEN
         INSERT INTO if_table (col1)
         VALUES ('one');
      END IF;
   END;
$$;

CALL ifExample1(1);

SELECT
   * FROM
   if_table;
|COL1|
|----|
|one |

Known Issues

No issues were found.

No related EWIs.

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