When exception raised rollingback the insert - postgresql

Question

I am calling the function
SELECT sbc_schemaA.func1(customernum => '5566789',custlocID => 25)
Whenever there is an exception raised in sbc_schemaD.func5 the insert statemet of sbc_schemaC.func4 is rolledback.
Even exception is raised it should not rollback the into custgartbl.
Please help me.
The code of the function sbc_schemaA.func1 as below.
It is calling another function "sbc_schemaB.func2" inside it.
create or replace function sbc_schemaA.func1(
customernum in VARCHAR default null,
custlocID in NUMERIC default null
) RETURNS void AS
$$
declare
ajsid numeric;
begin
select * from sbc_schemaB.func2(customernum, custlocID) into strict ajsid;
exception
when raise_exception then
RAISE info '%','ErrMsg: ' || substr(sqlerrm,1,instr(sqlerrm,e'\n',1,1)) ;
end $$ language plpgsql;
The code of the function sbc_schemaB.func2 as below.
It is calling another function "sbc_schemaC.func3" inside it.
create or replace function sbc_schemaB.func2(
customernumber IN VARCHAR,
custlocID IN NUMERIC,
brsid out NUMERIC) AS
$$
declare
v_ermsg text;
v_cnx text;
begin
select * from sbc_schemaC.func3(customernumber => customernumber,custlocID => custlocID) into strict brsid;
exception
when raise_exception then
GET STACKED DIAGNOSTICS v_ermsg = MESSAGE_TEXT,
v_cnx = PG_EXCEPTION_CONTEXT;
v_ermsg := set_context(v_ermsg::text, v_cnx::Text);
raise exception e'%', v_ermsg;
end $$ language plpgsql;
The code of the function sbc_schemaC.func3 as below.
It is calling another function "sbc_schemaC.func4" and "sbc_schemaD.func5" inside it.
create or replace function sbc_schemaC.func3(customernumber IN VARCHAR,
custlocID IN NUMERIC,
ajsid out NUMERIC,
brsid out NUMERIC) AS
$$
declare
v_ajsid numeric;
btpID numeric:=0;
select * from sbc_schemaC.func4(p_customernum => customernumber,
p_custlocID => custlocID
) into v_ajsid;
ajsid := v_ajsid;
if v_ajsid = 0 then
begin
select * from sbc_schemaD.func5(customernumber,btpID);
exception
when raise_exception then
GET STACKED DIAGNOSTICS v_ermsg = MESSAGE_TEXT,
v_cnx = PG_EXCEPTION_CONTEXT;
v_ermsg := set_context(v_ermsg::text, v_cnx::Text);
raise exception e'%', v_ermsg;
end;
end if;
end $$ language plpgsql;
The code of the function sbc_schemaC.func4 as below.
CREATE OR REPLACE FUNCTION sbc_schemaC.func4(
p_customernum VARCHAR,
p_custlocID numeric,
p_ajsid OUT numeric
) AS
$$
declare
v_cnx text;
v_ermsg text;
begin
insert into custgartbl(account_num,custlocID) values(p_customernum,p_custlocID);
exception
when raise_exception then
GET STACKED DIAGNOSTICS v_ermsg = MESSAGE_TEXT,
v_cnx = PG_EXCEPTION_CONTEXT;
v_ermsg := set_context(v_ermsg::text, v_cnx::Text);
raise exception e'%', v_ermsg;
end $$ language plpgsql;
The code of the function sbc_schemaD.func5 as below.
CREATE OR REPLACE FUNCTION sbc_schemaD.func5 (customernumber text, btpID numeric) AS $body$
DECLARE
errmsg text;
v_ermsg text;
v_cnx text;
BEGIN
if btpID = 0 then
errmsg := cermssg('error')
raise exception e'%',errmsg;
end if;
exception
when raise_exception then
GET STACKED DIAGNOSTICS
v_ermsg = MESSAGE_TEXT,
v_cnx = PG_EXCEPTION_CONTEXT;
v_ermsg := v_ermsg||E'\n'||v_cnx;
raise exception e'%', v_ermsg;
END;
$body$
LANGUAGE PLPGSQL
Thanks in advance.

Answer 1

The code you post for func3 is buggy; it is missing the initial BEGIN.
Anyway, when simplified, your code looks like this:
SELECT * FROM func4(...) INTO ...;
IF v_ajsid = 0 THEN
BEGIN
SELECT * FROM func5(...);
EXCEPTION
WHEN raise_exception THEN
RAISE EXCEPTION ...;
END;
END IF;
Since you raise an exception in the exception handler, the whole (sub?)transaction in which func3 is executed gets rolled back, so the effects of the call to func4 are undone.
You have to something other than raising an exception in the exception handler if you want to preserve the effects of the call to func4.