PostgreSQL 9.5 Insert/Update while partitioning table - sql

Question

I need to achieve updating (via ON CONFLICT()) row in a partitioned tables.
So far, my tries:
Table creation:
CREATE TABLE public.my_tbl
(
goid character varying(255) NOT NULL,
timestamps timestamp without time zone[],
somenumber numeric[],
CONSTRAINT my_tbl_pkey PRIMARY KEY (goid)
)
WITH (
OIDS=FALSE
);
ALTER TABLE public.my_tbl
OWNER TO postgres;
Table Sequence:
CREATE SEQUENCE public.fixations_data_pkey_seq
INCREMENT 1
MINVALUE 1
MAXVALUE 9223372036854775807
START 1
CACHE 1;
ALTER TABLE public.fixations_data_pkey_seq
OWNER TO postgres;
Table partition trigger, which creates new table with name "table_YYYY_MM_DD", where "YYYY_MM_DD" - current date (query execution date):
CREATE OR REPLACE FUNCTION public.my_tbl_insert_trigger()
RETURNS trigger AS
$BODY$
DECLARE
table_master varchar(255) := 'my_tbl';
table_part varchar(255) := '';
BEGIN
-- Partition table name --------------------------------------------------
table_part := table_master
|| '_' || DATE_PART( 'year', NOW() )::TEXT
|| '_' || DATE_PART( 'month', NOW() )::TEXT
|| '_' || DATE_PART( 'day', NOW() )::TEXT;
-- Check if partition exists --------------------------------
PERFORM
1
FROM
pg_class
WHERE
relname = table_part
LIMIT
1;
-- If not exist, create new one --------------------------------------------
IF NOT FOUND
THEN
-- Create parition, which inherits master table --------------------------
EXECUTE '
CREATE TABLE ' || table_part || '
(
goid character varying(255) NOT NULL DEFAULT nextval(''' || table_master || '_pkey_seq''::regclass),
CONSTRAINT ' || table_part || '_pkey PRIMARY KEY (goid)
)
INHERITS ( ' || table_master || ' )
WITH ( OIDS=FALSE )';
-- Create indices for current table-------------------------------
EXECUTE '
CREATE INDEX ' || table_part || '_adid_date_index
ON ' || table_part || '
USING btree
(goid)';
END IF;
-- Insert row into table (without ON CONFLICT)--------------------------------------------
EXECUTE '
INSERT INTO ' || table_part || '
SELECT ( (' || QUOTE_LITERAL(NEW) || ')::' || TG_RELNAME || ' ).*';
RETURN NULL;
END;
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100;
ALTER FUNCTION public.my_tbl_insert_trigger()
OWNER TO postgres;
CREATE TRIGGER my_tbl_insert_trigger
BEFORE INSERT
ON my_tbl
FOR EACH ROW
EXECUTE PROCEDURE my_tbl_insert_trigger();
After this I can insert new rows into table:
INSERT INTO my_tbl (goid, timestamps, somenumber)
VALUES ('qwe123SSsssa3', '{"2016-11-16 00:00:00", "2016-11-16 01:00:00"}', '{3, 12333}')
But when I'm trying to do UPSERT:
INSERT INTO my_tbl (goid, timestamps, somenumber)
VALUES ('qwe123SSsssa3', '{"2016-11-16 02:00:00"}', '{999}')
ON CONFLICT (goid)
DO UPDATE
SET timestamps=array_append(my_tbl.timestamps::timestamp[], '2016-11-16 02:00:00'),
somenumber=array_append(my_tbl.somenumber,'999');
I'm geting DUPLICATE PKEY error.
I guess, that I have to add ON CONFLICT to third EXECUTE in trigger function. But how should I do this?

Answer 1

Well , I've changed my third EXECUTE to :
-- Insert row into table (with ON CONFLICT)--------------------------------------------
EXECUTE '
INSERT INTO ' || table_part || '
SELECT ( (' || QUOTE_LITERAL(NEW) || ')::' || TG_RELNAME || ' ).*
ON CONFLICT (goid)
DO UPDATE
SET timestamps=' || table_part || '.timestamps::timestamp[] || ' || QUOTE_LITERAL(NEW.timestamps) || ',
somenumber=' || table_part || '.somenumber::numeric[] || ' || QUOTE_LITERAL(NEW.somenumber) || '
';
RETURN NULL;
Now, when I execute query:
INSERT INTO my_tbl (goid, timestamps, somenumber)
VALUES ('potato_1', ARRAY['2016-11-16 12:00:00', '2016-11-16 15:00:00']::timestamp[], ARRAY[223, 211]::numeric[]);
there are no any errors, and it extends array-type columns as I expected
I can admit that this is a dirty solution, but it seems that it works.
If someone has a better solution, I'll glad to look at it.