Inserting into dynamic table partition in postgresql with return - postgresql

Question

I created a table partition that will create a table if it is not yet existing the table names are on a monthly basis. I need this function to return the inserted ID but I'm getting this error of column "partition" does not exist it seems that my schema(partition) is considered column in this code
CREATE OR REPLACE FUNCTION partition.itinerary_partition_function()
RETURNS TRIGGER AS
$BODY$
DECLARE
reflowId bigint;
_tablename text;
_startyear text;
_startmonth text;
_fulltablename text;
BEGIN
--Takes the current inbound "time" value and determines when midnight is for the given date
_startyear := to_char(now(), 'YYYY');
_startmonth := to_char(now(), 'MM');
_tablename := 'itinerary_'||_startyear || '_' || _startmonth;
_fulltablename := 'partition.' || _tablename;
-- Check if the partition needed for the current record exists
PERFORM 1
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relkind = 'r'
AND c.relname = _tablename
AND n.nspname = 'partition';
-- If the partition needed does not yet exist, then we create it:
-- Note that || is string concatenation (joining two strings to make one)
IF NOT FOUND THEN
EXECUTE 'CREATE TABLE partition.' || quote_ident(_tablename) || '()INHERITS (partition.itinerary)';
-- Table permissions are not inherited from the parent.
-- If permissions change on the master be sure to change them on the child also.
EXECUTE 'ALTER TABLE partition.' || quote_ident(_tablename) || ' OWNER TO postgres';
-- Indexes are defined per child, so we assign a default index that uses the partition columns
EXECUTE 'CREATE INDEX ' || quote_ident(_tablename||'_indx1') || ' ON partition.' || quote_ident(_tablename) || ' (id)';
END IF;
BEGIN
EXECUTE format('INSERT INTO %I SELECT $1.*', "partition." || _tablename)
USING NEW;
RETURN NEW;
END;
END;
$BODY$
LANGUAGE plpgsql;
After this code I am calling it in another insert function
CREATE OR REPLACE FUNCTION partition.insert_data(username text,jsonData jsonb) RETURNS bigint AS
$$
DECLARE reflowId bigint;
BEGIN
INSERT INTO reflow_partition.itinerary(username, data)
VALUES (username, jsonData) RETURNING id;
END;
$$
LANGUAGE plpgsql;

Answer 1

Try changing this:
EXECUTE format('INSERT INTO %I SELECT $1.*', "partition." || _tablename)
to this:
EXECUTE format('INSERT INTO %1$I.%2$I SELECT $1.*', 'partition', _tablename)