ALIAS DECLARATION

Description

If the stored procedure's signature omits the argument name, you can declare an alias for the argument.

There is no support for this in Snowflake.

To achieve functional equivalence, aliases will be removed, and all usages will be renamed.

When an alias is declared for a parameter nameless, a generated name will be created for the parameter and the usages. When the alias is for a parameter with name the alias will be replaced by the real parameter name.

Grammar Syntax

name ALIAS FOR $n;

Sample Source Patterns

Input Code:

Redshift

IN -> Redshift_01.sql

CREATE OR REPLACE PROCEDURE test_procedure (integer)
LANGUAGE plpgsql
AS
$$
DECLARE
    first_alias ALIAS  FOR $1;
    second_alias ALIAS  FOR $1;
BEGIN
   INSERT INTO t1
   VALUES (first_alias + 1);
   INSERT INTO t1
   VALUES (second_alias + 2);
END;
$$;

--Notice the parameter already has a name
--and we are defining two alias to the same parameter
CREATE OR REPLACE PROCEDURE test_procedure (PARAMETER1 integer)
LANGUAGE plpgsql
AS
$$
DECLARE
    first_alias ALIAS  FOR $1;
    second_alias ALIAS  FOR $1;
BEGIN
   INSERT INTO t1
   VALUES (first_alias + 1);
   INSERT INTO t1
   VALUES (second_alias + 2);
END;
$$;

Output Code:

Snowconvert

OUT -> Redshift_01.sql

CREATE OR REPLACE PROCEDURE test_procedure (SC_ARG1 integer)
RETURNS VARCHAR
LANGUAGE SQL
COMMENT = '{ "origin": "sf_sc", "name": "snowconvert", "version": {  "major": 0,  "minor": 0,  "patch": "0" }, "attributes": {  "component": "redshift",  "convertedOn": "03/03/2025",  "domain": "test" }}'
AS
$$
BEGIN
   INSERT INTO t1
   VALUES (:SC_ARG1 + 1);
   INSERT INTO t1
   VALUES (:SC_ARG1 + 2);
END;
$$;

--Notice the parameter already has a name
--and we are defining two alias to the same parameter
--** SSC-FDM-0007 - MISSING DEPENDENT OBJECT "t1" **
CREATE OR REPLACE PROCEDURE test_procedure (PARAMETER1 integer)
RETURNS VARCHAR
LANGUAGE SQL
COMMENT = '{ "origin": "sf_sc", "name": "snowconvert", "version": {  "major": 0,  "minor": 0,  "patch": "0" }, "attributes": {  "component": "redshift",  "convertedOn": "03/03/2025",  "domain": "test" }}'
AS
$$
BEGIN
   INSERT INTO t1
   VALUES (:PARAMETER1 + 1);
   INSERT INTO t1
   VALUES (:PARAMETER1 + 2);
END;
$$;

Known Issues

There are no known issues.

Related EWIs.

There are no related EWIs.