I am trying to copy data from one table to another using plpgsql. The two tables have different structure cause the new one is object-table. My function is this :
CREATE OR REPLACE FUNCTION copy_customers() RETURNS integer as $BODY$ DECLARE idcounter integer := 1; firstname text; lastname text; address1 text; address2 text; city text; state text; zip text; country text; region text; BEGIN FOR idcounter In 1..20000 LOOP
-- Add the values into the variables. SELECT "FirstName","LastName","Address1","Address2","City","State","Zip","Country","Region" INTO firstname, lastname,address1,address2,city,state,zip,country,region FROM "Customers" WHERE "CustomerId" = idcounter;
--Insert the variables to the new table. INSERT INTO "Customers_object_table" (customerid , firstname, lastname, address) VALUES(idcounter,firstname,lastname,(address1,address2,city,state,zip,country,region)); END Loop;
return 1; END; $BODY$ LANGUAGE plpgsql;
This function is working fine, but the problem is that the table "Customers" has more than 20 columns, so the code is ugly and unmaintainable. Also I want to do the same job for 10 more tables.
Can somebody help me to change this function in a way that I won't have to declare the columns?
Notice that the destination-tables are object tables and can be different than the old tables, so I am not sure if what I ask is possible.