OUTPUT PARAMETERS

This article is about the current transformation of the output parameters and how their functionality is being emulated.

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

Description

An output parameter is a parameter whose value is passed out of the stored procedure, back to the calling statement. Snowflake has direct support for output parameters.

Sample Source Patterns

Single out parameter

Teradata

IN -> Teradata_02.sql

CREATE PROCEDURE demo.proc_with_single_output_parameters(OUT param1 NUMBER)
BEGIN
 SET param1 = 100;
END;

REPLACE PROCEDURE demo.proc_calling_proc_with_single_output_parameters ()
BEGIN
  DECLARE mytestvar NUMBER;
  CALL demo.proc_with_single_output_parameters(mytestvar);
  INSERT INTO demo.TABLE20 VALUES(mytestvar,432);
END;

Snowflake

Multiple out parameter

Teradata

IN -> Teradata_03.sql

CREATE PROCEDURE demo.proc_with_multiple_output_parameters(OUT param1 NUMBER, INOUT param2 NUMBER)
BEGIN
  SET param1 = param2;
  SET param2 = 32;
END;

CREATE PROCEDURE demo.proc_calling_proc_with_multiple_output_parameters ()
BEGIN
    DECLARE var1  NUMBER;
    DECLARE var2  NUMBER;
    SET var2 = 34;
    CALL demo.proc_with_multiple_output_parameters(var1, var2);
    INSERT INTO demo.TABLE20 VALUES(var1,var2);
END;

Snowflake

Related EWIs

No related EWIs.