On Wed, Feb 5, 2014 at 7:53 AM, George Ant <g.antonopoulos000@xxxxxxxxx> wrote:
Hey Guys,
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.
Kind Regards,
George Ant
--
View this message in context: http://postgresql.1045698.n5.nabble.com/PL-pgSQL-Copy-data-from-one-table-to-another-tp5790663.html
Sent from the PostgreSQL - general mailing list archive at Nabble.com.
--
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general
I assume you created a composite type (addresstype) in Customers_object_table.
CREATE OR REPLACE FUNCTION copy_customers() RETURNS integer as $BODY$
BEGIN
INSERT INTO Customers_object_table (customerid, firstname, lastname, address)
SELECT c.customerid, c.firstname, c.lastname, (c.address1, c.address2, c.city, c.zip, c.country, c.region)::addresstype
FROM Customers c
WHERE c.customerid >= 1 AND c.customerid <= 20000;
RETURN 1;
END
$BODY$
LANGUAGE plpgsql;
