I have to create a update procedure, so i created a function and given only below query
CREATE FUNCTION public.testf()
RETURNS boolean
LANGUAGE 'plpgsql'
AS $BODY$begin
update tt pp
set status = 'Ok'
return true;
end;$BODY$;
ALTER FUNCTION public.testf()
OWNER TO postgres;
returns error
ERROR: syntax error at or near "UPDATE" LINE 5: AS $BODY$UPDATE
return type I have given is int4range
What I am doing wrong
Please help
THanks
Pulling out my crystal ball, I see:
You created the function with LANGUAGE plpgsql.
You didn't surround the function body with BEGIN ... END;.
If your function is just a single SQL statement, use LANGUAGE sql.
Else, use the block-centered PL/pgSQL syntax properly.
You are missing an ; to end the UPDATE statement.
CREATE FUNCTION public.testf()
RETURNS boolean
LANGUAGE plpgsql
AS $BODY$
begin
update tt pp
set status = 'Ok'; --<< here
return true;
end;
$BODY$;
Related
So I have some simple function that should add value to an existing enum "profession" but instead of working it shows error
CREATE FUNCTION add_prof(p text) RETURNS VOID AS $$
BEGIN
ALTER TYPE profession ADD VALUE p;
RETURN;
END;
$$ LANGUAGE plpgsql;
The error is "[42601] syntax error". Btw, DataGrip shows that "string or IF expected but p."
Changing p to ' ' of course works fine but that's not what I need.
ALTER command is DDL command, and DDL commands doesn't allow an parametrization (they has not an execution plan). You need to use dynamic SQL:
CREATE FUNCTION add_prof(p text)
RETURNS VOID AS $$
BEGIN
EXECUTE format('ALTER TYPE profession ADD VALUE %L', p);
RETURN;
END;
$$ LANGUAGE plpgsql;
CREATE FUNCTION retrieve_add_friends(user_id text[])
RETURNS SETOF user_rows AS
$BODY$
BEGIN
FOR user_rows IN EXECUTE SELECT * FROM user_details where user_id= $1
LOOP
FOR user_friends IN EXECUTE SELECT * FROM user_add_friends where user_id= $1
LOOP
IF user_rows.user_id!=user_friends.user_friend_id THEN
RETURN NEXT user_rows;
END IF;
END LOOP;
RETURN;
END LOOP;
RETURN;
END
$BODY$
language plpgsql VOLATILE;
When I execute this I get following error:
ERROR: return type mismatch in function declared to return user_details
DETAIL: Function's final statement must be SELECT or INSERT/UPDATE/DELETE RETURNING.
CONTEXT: SQL function "retrieve_add_friends"
Can anyone help me out with this?
The function displayed is a PL/pgSQL function.
You are calling a different function, an SQL function, obviously (for which the error msg would make sense):
SQL function "retrieve_add_friends"
Same function name, but different arguments (and possibly in a different database schema). Are you aware of function overloading and its implications?
Related:
ERROR: function addgeometrycolumn is not unique
For a quick diagnosis:
SELECT oid::regprocedure AS function_signature, *
FROM pg_proc
WHERE proname = 'retrieve_add_friends';
All that aside, the function displayed has multiple errors and can be replaced with plain SELECT.
Is it possible to cancel previous operations in a user defined function?
For example:
CREATE OR REPLACE FUNCTION transact_test () RETURNS BOOLEAN
AS $$
BEGIN
UPDATE table1 SET ...
UPDATE table2 SET ...
IF some_condition THEN
--Here is possible to cancel all above operations?
RETURN FALSE;
END IF;
RETURN TRUE;
END;
$$
LANGUAGE plpgsql;
Both answers so far are incorrect.
If you try to start a transaction or use a SAVEPOINT inside a plpgsql function you get an error message like this:
ERROR: cannot begin/end transactions in PL/pgSQL
HINT: Use a BEGIN block with an EXCEPTION clause instead.
CONTEXT: PL/pgSQL function "f_savepoint" line 6 at SQL statement
If you try a SAVEPOINT inside a plain SQL function:
ERROR: SAVEPOINT is not allowed in a SQL function
CONTEXT: SQL function "f_savepoint2" during startup
As the error message instructs, use a BEGIN block inside a plpgsql function instead. Your demo could look like this:
CREATE OR REPLACE FUNCTION transact_test(boolean)
RETURNS boolean AS
$func$
BEGIN -- start a nested BEGIN block
UPDATE t SET i = i+1 WHERE i = 1;
UPDATE t SET i = i+1 WHERE i = 3;
IF $1 THEN
RAISE EXCEPTION 'foo'; -- cancels all of the above
END IF;
RETURN TRUE;
EXCEPTION WHEN OTHERS THEN
RETURN FALSE;
-- do nothing
END
$func$ LANGUAGE plpgsql;
-> SQLfiddle demonstrating it all.
I have a function and I need to do different select based on inputid. so I have added the condition as below.
....
begin
IF(iv_binrocess = 1 AND IsNull(iv_binno,'') != '') THEN
...//some process here
END If;
...
End
When I run the function, I got the error "
ERROR: syntax error at or near "IF"
I referred many sites and tutorials, nothing helped me.
Can anyone help me to fix this issue?
Thanks
WAG, since you deleted most of the important information: You're trying to create a function with a PL/pgsql body, but declaring it SQL.
craig=> CREATE FUNCTION test() RETURNS void LANGUAGE sql AS
$$ BEGIN IF TRUE THEN PERFORM 1; END IF; END; $$ ;
ERROR: syntax error at or near "IF"
LINE 1: ...TION test() RETURNS void LANGUAGE sql AS $$ BEGIN IF TRUE TH...
Declare PL/PgSQL functions as LANGUAGE plpgsql.
If you instead want to use an SQL function, use a CASE expression instead of IF.
CREATE FUNCTION test2() RETURNS integer LANGUAGE sql
AS $$ SELECT CASE WHEN TRUE THEN 1 ELSE 0 END; $$;
(Note, I haven't bothered to format these readably. Don't write functions all in one line like this in real code.)
CREATE OR REPLACE FUNCTION dummytest_insert_trigger()
RETURNS trigger AS
$BODY$
DECLARE
v_partition_name VARCHAR(32);
BEGIN
IF NEW.datetime IS NOT NULL THEN
v_partition_name := 'dummyTest';
EXECUTE format('INSERT INTO %I VALUES ($1,$2)',v_partition_name)using NEW.id,NEW.datetime;
END IF;
RETURN NULL;
END;
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100;
ALTER FUNCTION dummytest_insert_trigger()
OWNER TO postgres;
I'm trying to insert using
insert into dummyTest values(1,'2013-01-01 00:00:00+05:30');
But it's showing error as
ERROR: function format(unknown) does not exist
SQL state: 42883
Hint: No function matches the given name and argument types. You might need to add explicit type casts.
Context: PL/pgSQL function "dummytest_insert_trigger" line 8 at EXECUTE statement
I'm unable get the error.
Your function could look like this in Postgres 9.0 or later:
CREATE OR REPLACE FUNCTION dummytest_insert_trigger()
RETURNS trigger AS
$func$
DECLARE
v_partition_name text := quote_ident('dummyTest'); -- assign at declaration
BEGIN
IF NEW.datetime IS NOT NULL THEN
EXECUTE
'INSERT INTO ' || v_partition_name || ' VALUES ($1,$2)'
USING NEW.id, NEW.datetime;
END IF;
RETURN NULL; -- You sure about this?
END
$func$ LANGUAGE plpgsql;
About RETURN NULL:
To ignore result in BEFORE TRIGGER of PostgreSQL?
I would advice not to use mixed case identifiers. With format( .. %I ..) or quote_ident(), you'd get a table named "dummyTest", which you'll have to double quote for the rest of its existence. Related:
Are PostgreSQL column names case-sensitive?
Use lower case instead:
quote_ident('dummytest')
There is really no point in using dynamic SQL with EXECUTE as long as you have a static table name. But that's probably just the simplified example?
You need explicit cast to text:
EXECUTE format('INSERT INTO %I VALUES ($1,$2)'::text ,v_partition_name) using NEW.id,NEW.datetime;