Have you tried the 'coalesce' function to handle the nulls?
Kind Regards,
Adam Pearson
From: pgsql-general-owner@postgresql.org <pgsql-general-owner@postgresql.org> on behalf of Sridhar N Bamandlapally <sridhar.bn1@gmail.com> Sent: 12 May 2016 09:47 To: PG-General Mailing List; PostgreSQL-hackers Subject: [GENERAL] NULL concatenation
Hi
In migration, am facing issue with NULL concatenation in plpgsql,
by concatenating NULL between any where/position to Text / Varchar, the total string result is setting value to NULL
In Oracle:
declare
txt1 VARCHAR2(100) := 'ABCD';
txt2 VARCHAR2(100) := NULL;
txt3 VARCHAR2(100) := 'EFGH';
txt VARCHAR2(100) := NULL;
begin
txt:= txt1 || txt2 || txt3;
dbms_output.put_line (txt);
end;
/
abcdefgh ===>return value
In Postgres
do $$
declare
txt1 text := 'ABCD';
txt2 text := NULL;
txt3 text := 'EFGH';
txt text := NULL;
begin
txt:= txt1 || txt2 || txt3;
raise notice '%', txt;
end$$ language plpgsql;
NOTICE: <NULL> ===> return value
SQL-Server also does same like Oracle
Is there any way alternate we have for same behavior in PostgreSQL
