How can i update a row in postgresql? - postgresql

Question

i have a table named person and it looks like this:
CREATE TABLE public.person
(
"idPerson" integer NOT NULL DEFAULT nextval('idperson'::regclass),
fname character varying(45) COLLATE pg_catalog."default",
lname character varying(45) COLLATE pg_catalog."default",
sex character(1) COLLATE pg_catalog."default",
dateofbirth date,
address character varying(75) COLLATE pg_catalog."default",
city character varying(45) COLLATE pg_catalog."default",
country character varying(45) COLLATE pg_catalog."default",
CONSTRAINT "idPerson_PK" PRIMARY KEY ("idPerson")
)
I want to perform an update through a function( my_update_function(fname,lname , sex ,dateofbirth,address,city,country) . My problem here is that i dont want a specific condition ,instead i want to just call the function like this for example:
SELECT my_update_function('Jamie','Phillips', 'F',1973-03-08,'Santina Island 108','Okhotsk',Russia)
and updates my table in the row with idPerson 57 only in the column that it is different (fname in this case )
This is what i did:
UPDATE person
SET fname=my_update_function.fname , lname=my_update_function.lname
,sex=my_update_function.sex , dateofbirth=my_update_function.dateofbirth
,address=my_update_function.address , city=my_update_function.city
,country=my_update_function.country
WHERE person.fname='Karissa';
I updated my table but the problem here is that i had to put the specific fname 'Karissa' inside of the function ,instead i want to be done automatically .
How can i do something like that?
Thank you.

Answer 1

Maybe you can try something like this
execute 'UPDATE person
SET fname='||my_update_function.fname||' , lname='||my_update_function.lname||'
,sex='||my_update_function.sex||' , dateofbirth='||my_update_function.dateofbirth||'
,address='||my_update_function.address||' , city='||y_update_function.city||'
,country='||my_update_function.country||'
WHERE person.fname='''||my_update_function.fname||'''';
or (better, because it is not vulnerable to SQL injection)
prepare query as UPDATE person SET fname=$1 , lname=$2 ,sex=$3, dateofbirth=$4,address=$5, city=$6,country=$7 WHERE person.fname=$8;
execute query(fname,lname,sex,dateofbirth,address,city,country,fname);