How to do it? Need help in syntax - new to Oracle syntax

Question

create or replace
PROCEDURE "SP_SAMPLE_data" (prodName in VARCHAR2) AS
where_criteria char(100);
BEGIN
if prodName = 'A' then
I want to build the where criteria string as “product_name in (‘iPod’,’iPad’)”
else
I want to build the where criteria string as “product_name = directly read from the passed variable(prodName)”
end if;
select *
from “MySchema”.”MyTable”
where where_criteria concatenated here – do not know how to concatenate;
END SP_SAMPLE_data;
New to Oracle PL/SQL syntax.
Oracle 10gR2

Answer 1

You could try someting like this
create or replace procedure SP_SAMPLE_data (prodName in VARCHAR2) AS
   where_criteria char(100);
   sql_stmt varchar2(1000);
BEGIN
   if prodName = 'A' then
      -- I want to build the where criteria string as "product_name in ('iPod','iPad')"
      where_criteria := 'product_name in (''iPod'',''iPad'')';
   else
      -- I want to build the where criteria string as
      -- "product_name = directly read from the passed variable(prodName)"
      where_criteria := 'product_name = '''||prodName||'''';
  end if;
  sql_stmt := 'select * from MySchema.MyTable'||where_criteria;
END SP_SAMPLE_data;I added SQL_STMT variable as I am not sure what do you want to do with SQL statement once it is created. Do you plan to execute it in the procedure or pass it back to the calling environment? If you need to pass it back, then specify SQL_STMT as out parameter.