DEFAULT PARAMETERS
This article is about the current transformation of the default parameters and how their functionality is being emulated.
Last updated
This article is about the current transformation of the default parameters and how their functionality is being emulated.
Last updated
A default parameter is a parameter that has a value in case an argument is not passed in the procedure or function call. Since Snowflake doesn't support default parameters, SnowConvert inserts the default value in the procedure or function call.
In the declaration, the DEFAULT VALUE clause of the parameter is removed. Both syntaxes, the := symbol and the DEFAULT clause, are supported.
CREATE TABLE TABLE1(COL1 NUMBER, COL2 NUMBER);
CREATE TABLE TABLE2(COL1 NUMBER, COL2 NUMBER, COL2 NUMBER);CREATE OR REPLACE PROCEDURE PROC_WITH_DEFAULT_PARAMS1 (
param1 NUMBER,
param2 NUMBER default TO_NUMBER(1)
)
AS
BEGIN
INSERT INTO TABLE1 (COL1, COL2)
VALUES(param1, param2);
END;
CREATE OR REPLACE PROCEDURE PROC_WITH_DEFAULT_PARAMS2 (
param1 NUMBER default 1,
param2 NUMBER default 2
)
AS
BEGIN
INSERT INTO TABLE1 (COL1, COL2)
VALUES(param1, param2);
END;
CREATE OR REPLACE PROCEDURE PROCEDURE_WITH_DEAFAULT_PARAMS3 (
param1 NUMBER DEFAULT 100,
param2 NUMBER,
param3 NUMBER DEFAULT 1000
)
IS
BEGIN
INSERT INTO TABLE2(COL1, COL2, COL3)
VALUES (param1, param2, param3);
END;CREATE OR REPLACE PROCEDURE PROC_WITH_DEFAULT_PARAMS1 (param1 NUMBER(38, 18),
param2 NUMBER(38, 18) DEFAULT TO_NUMBER(1)
)
RETURNS VARCHAR
LANGUAGE SQL
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"oracle"}}'
EXECUTE AS CALLER
AS
$$
BEGIN
INSERT INTO TABLE1(COL1, COL2)
VALUES(:param1, :param2);
END;
$$;
CREATE OR REPLACE PROCEDURE PROC_WITH_DEFAULT_PARAMS2 (
param1 NUMBER(38, 18) DEFAULT 1,
param2 NUMBER(38, 18) DEFAULT 2
)
RETURNS VARCHAR
LANGUAGE SQL
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"oracle"}}'
EXECUTE AS CALLER
AS
$$
BEGIN
INSERT INTO TABLE1(COL1, COL2)
VALUES(:param1, :param2);
END;
$$;
CREATE OR REPLACE PROCEDURE PROCEDURE_WITH_DEAFAULT_PARAMS3 (
param1 NUMBER(38, 18) DEFAULT 100, param2 NUMBER(38, 18),
param3 NUMBER(38, 18) DEFAULT 1000
)
RETURNS VARCHAR
LANGUAGE SQL
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"oracle"}}'
EXECUTE AS CALLER
AS
$$
BEGIN
INSERT INTO TABLE2(COL1, COL2, COL3)
VALUES (:param1, :param2, :param3);
END;
$$;CREATE OR REPLACE PROCEDURE PROC_WITH_DEFAULT_CALLS
AS
BEGIN
PROC_WITH_DEFAULT_PARAMS1(10, 15);
PROC_WITH_DEFAULT_PARAMS1(10);
PROC_WITH_DEFAULT_PARAMS2(10, 15);
PROC_WITH_DEFAULT_PARAMS2(10);
PROC_WITH_DEFAULT_PARAMS2();
END;CREATE OR REPLACE PROCEDURE PROC_WITH_DEFAULT_CALLS ()
RETURNS VARCHAR
LANGUAGE SQL
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"oracle"}}'
EXECUTE AS CALLER
AS
$$
BEGIN
CALL
PROC_WITH_DEFAULT_PARAMS1(10, 15);
CALL
PROC_WITH_DEFAULT_PARAMS1(10);
CALL
PROC_WITH_DEFAULT_PARAMS2(10, 15);
CALL
PROC_WITH_DEFAULT_PARAMS2(10);
CALL
PROC_WITH_DEFAULT_PARAMS2();
END;
$$;In order to check that the functionality is being emulated correctly the following query is going to execute the procedure and a SELECT from the table mentioned before.
CALL PROC_WITH_DEFAULT_CALLS();
SELECT * FROM TABLE1;CALL PROC_WITH_DEFAULT_CALLS();
SELECT * FROM TABLE1;CREATE OR REPLACE PROCEDURE PROC_WITH_DEFAULT_CALLS2
AS
BEGIN
PROCEDURE_WITH_DEAFAULT_PARAMS3(10, 20, 30);
PROCEDURE_WITH_DEAFAULT_PARAMS3(param1 => 10, param2 => 20, param3 => 30);
PROCEDURE_WITH_DEAFAULT_PARAMS3(param3 => 10, param1 => 20, param2 => 30);
PROCEDURE_WITH_DEAFAULT_PARAMS3(param3 => 10, param2 => 30);
PROCEDURE_WITH_DEAFAULT_PARAMS3(param2 => 10, param3 => 30);
PROCEDURE_WITH_DEAFAULT_PARAMS3(param2 => 10);
END;CREATE OR REPLACE PROCEDURE PROC_WITH_DEFAULT_CALLS2 ()
RETURNS VARCHAR
LANGUAGE SQL
COMMENT = '{"origin":"sf_sc","name":"snowconvert","version":{"major":1, "minor":0},{"attributes":{"component":"oracle"}}'
EXECUTE AS CALLER
AS
$$
BEGIN
CALL
PROCEDURE_WITH_DEAFAULT_PARAMS3(10, 20, 30);
CALL
PROCEDURE_WITH_DEAFAULT_PARAMS3(10, 20, 30);
CALL
PROCEDURE_WITH_DEAFAULT_PARAMS3(10, 20, 30);
CALL
PROCEDURE_WITH_DEAFAULT_PARAMS3(10, 30);
CALL
PROCEDURE_WITH_DEAFAULT_PARAMS3(10, 30);
CALL
PROCEDURE_WITH_DEAFAULT_PARAMS3(10);
END;
$$;In order to check that the functionality is being emulated correctly the following query is going to execute the procedure and a SELECT from the table mentioned before.
CALL PROC_WITH_DEFAULT_CALLS2();
SELECT * FROM TABLE2;CALL PROC_WITH_DEFAULT_CALLS2();
SELECT * FROM TABLE2;1. No issues found
SSC-FDM-0019: Sematic information could not be loaded.