--
-- MULTI_SUBQUERY
--


ALTER SEQUENCE pg_catalog.pg_dist_shardid_seq RESTART 270000;

-- print major version to make version-specific tests clear
SHOW server_version \gset
SELECT substring(:'server_version', '\d+\.\d+') AS major_version;


-- Create tables for subquery tests
CREATE TABLE lineitem_subquery (
	l_orderkey bigint not null,
	l_partkey integer not null,
	l_suppkey integer not null,
	l_linenumber integer not null,
	l_quantity decimal(15, 2) not null,
	l_extendedprice decimal(15, 2) not null,
	l_discount decimal(15, 2) not null,
	l_tax decimal(15, 2) not null,
	l_returnflag char(1) not null,
	l_linestatus char(1) not null,
	l_shipdate date not null,
	l_commitdate date not null,
	l_receiptdate date not null,
	l_shipinstruct char(25) not null,
	l_shipmode char(10) not null,
	l_comment varchar(44) not null,
	PRIMARY KEY(l_orderkey, l_linenumber) );
SELECT master_create_distributed_table('lineitem_subquery', 'l_orderkey', 'range');

CREATE TABLE orders_subquery (
	o_orderkey bigint not null,
	o_custkey integer not null,
	o_orderstatus char(1) not null,
	o_totalprice decimal(15,2) not null,
	o_orderdate date not null,
	o_orderpriority char(15) not null,
	o_clerk char(15) not null,
	o_shippriority integer not null,
	o_comment varchar(79) not null,
	PRIMARY KEY(o_orderkey) );
SELECT master_create_distributed_table('orders_subquery', 'o_orderkey', 'range');

SET citus.enable_router_execution TO 'false';

-- Check that we allow subquery pushdown in default settings.

SELECT
	avg(unit_price)
FROM
	(SELECT
		l_orderkey,
		avg(o_totalprice) AS unit_price
	FROM
		lineitem_subquery,
		orders_subquery
	WHERE
		l_orderkey = o_orderkey
	GROUP BY
		l_orderkey) AS unit_prices;

-- Check that we don't crash if there are not any shards.

SELECT
	avg(unit_price)
FROM
	(SELECT
		l_orderkey,
		avg(o_totalprice) AS unit_price
	FROM
		lineitem_subquery,
		orders_subquery
	WHERE
		l_orderkey = o_orderkey
	GROUP BY
		l_orderkey) AS unit_prices;

-- Load data into tables.

SELECT master_create_empty_shard('lineitem_subquery') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = 1, shardmaxvalue = 5986
WHERE shardid = :new_shard_id;

SELECT master_create_empty_shard('lineitem_subquery') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = 8997, shardmaxvalue = 14947
WHERE shardid = :new_shard_id;

SELECT master_create_empty_shard('orders_subquery') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = 1, shardmaxvalue = 5986
WHERE shardid = :new_shard_id;

SELECT master_create_empty_shard('orders_subquery') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = 8997, shardmaxvalue = 14946
WHERE shardid = :new_shard_id;

SET citus.shard_max_size TO "1MB";

\copy lineitem_subquery FROM '@abs_srcdir@/data/lineitem.1.data' with delimiter '|'
\copy lineitem_subquery FROM '@abs_srcdir@/data/lineitem.2.data' with delimiter '|'

\copy orders_subquery FROM '@abs_srcdir@/data/orders.1.data' with delimiter '|'
\copy orders_subquery FROM '@abs_srcdir@/data/orders.2.data' with delimiter '|'

-- Check that we error out if shard min/max values are not exactly same.

SELECT
	avg(unit_price)
FROM
	(SELECT
		l_orderkey,
		avg(o_totalprice) AS unit_price
	FROM
		lineitem_subquery,
		orders_subquery
	WHERE
		l_orderkey = o_orderkey
	GROUP BY
		l_orderkey) AS unit_prices;

-- Update metadata in order to make all shards equal.

UPDATE pg_dist_shard SET shardmaxvalue = '14947' WHERE shardid = 270003;

-- If group by is not on partition column then we error out from single table
-- repartition code path

SELECT
	avg(order_count)
FROM
	(SELECT
		l_suppkey,
		count(*) AS order_count
	FROM
		lineitem_subquery
	GROUP BY
		l_suppkey) AS order_counts;

-- Check that we error out if join is not on partition columns.

SELECT
	avg(unit_price)
FROM
	(SELECT
		l_orderkey,
		avg(o_totalprice / l_quantity) AS unit_price
	FROM
		lineitem_subquery,
		orders_subquery
	GROUP BY
		l_orderkey) AS unit_prices;

SELECT
	avg(unit_price)
FROM
	(SELECT
		l_orderkey,
		avg(o_totalprice / l_quantity) AS unit_price
	FROM
		lineitem_subquery,
		orders_subquery
	WHERE
		l_orderkey = o_custkey
	GROUP BY
		l_orderkey) AS unit_prices;

-- Check that we error out if there is non relation subqueries
SELECT count(*) FROM
(
   (SELECT l_orderkey FROM lineitem_subquery) UNION ALL
   (SELECT 1::bigint)
) b;


-- Check that we error out if queries in union do not include partition columns.

SELECT count(*) FROM
(
   (SELECT l_orderkey FROM lineitem_subquery) UNION
   (SELECT l_partkey FROM lineitem_subquery)
) b;

-- Check that we run union queries if partition column is selected.

SELECT count(*) FROM
(
   (SELECT l_orderkey FROM lineitem_subquery) UNION
   (SELECT l_orderkey FROM lineitem_subquery)
) b;
-- Check that we error out if inner query has Limit but subquery_pushdown is not set
SELECT
	avg(o_totalprice/l_quantity)
FROM
		(SELECT
			l_orderkey,
			l_quantity
		FROM
			lineitem_subquery
		ORDER BY
			l_quantity
		LIMIT 10
		) lineitem_quantities
	JOIN LATERAL
		(SELECT
			o_totalprice
		FROM
			orders_subquery
		WHERE
			lineitem_quantities.l_orderkey = o_orderkey) orders_price ON true;

-- Limit is only supported when subquery_pushdown is set
-- Check that we error out if inner query has limit but outer query has not.
SET citus.subquery_pushdown to ON;
SELECT
	avg(o_totalprice/l_quantity)
FROM
		(SELECT
			l_orderkey,
			l_quantity
		FROM
			lineitem_subquery
		ORDER BY
			l_quantity
		LIMIT 10
		) lineitem_quantities
	JOIN LATERAL
		(SELECT
			o_totalprice
		FROM
			orders_subquery
		WHERE
			lineitem_quantities.l_orderkey = o_orderkey) orders_price ON true;

-- reset the flag for next query
SET citus.subquery_pushdown to OFF;

-- Check that we error out if the outermost query is a distinct clause.

SELECT
	count(DISTINCT a)
FROM (
	SELECT
		count(*) a
	FROM
		lineitem_subquery
	GROUP BY
	   l_orderkey
) z;

-- Check supported subquery types.

SELECT
	o_custkey,
	sum(order_count) as total_order_count
FROM
	(SELECT
		o_orderkey,
		o_custkey,
		count(*) AS order_count
	FROM
		orders_subquery
	WHERE
		o_orderkey > 0 AND
		o_orderkey < 12000
	GROUP BY
		o_orderkey, o_custkey) AS order_counts
GROUP BY
	o_custkey
ORDER BY
	total_order_count DESC,
	o_custkey ASC
LIMIT 10;

SELECT
	avg(unit_price)
FROM
	(SELECT
		l_orderkey,
		avg(o_totalprice / l_quantity) AS unit_price
	FROM
		lineitem_subquery,
		orders_subquery
	WHERE
		l_orderkey = o_orderkey
	GROUP BY
		l_orderkey) AS unit_prices
WHERE
	unit_price > 1000 AND
	unit_price < 10000;

-- Check that if subquery is pulled, we don't error and run query properly.

SELECT count(*) FROM
(
	SELECT l_orderkey FROM (
		(SELECT l_orderkey FROM lineitem_subquery) UNION
		(SELECT l_orderkey FROM lineitem_subquery)
	) a
	WHERE l_orderkey = 1
) b;

SELECT count(*) FROM
(
	SELECT * FROM (
		(SELECT * FROM lineitem_subquery) UNION
		(SELECT * FROM lineitem_subquery)
	) a
	WHERE l_orderkey = 1
) b;

SELECT max(l_orderkey) FROM
(
	SELECT l_orderkey FROM (
		SELECT
			l_orderkey
		FROM
			lineitem_subquery
		WHERE
			l_orderkey < 20000
		GROUP BY
			l_orderkey
  ) z
) y;

-- Add one more shard to one relation, then test if we error out because of different
-- shard counts for joining relations.

SELECT master_create_empty_shard('orders_subquery') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = 15000, shardmaxvalue = 20000
WHERE shardid = :new_shard_id;

SELECT
	avg(unit_price)
FROM
	(SELECT
		l_orderkey,
		avg(o_totalprice / l_quantity) AS unit_price
	FROM
		lineitem_subquery,
		orders_subquery
	WHERE
		l_orderkey = o_orderkey
	GROUP BY
		l_orderkey) AS unit_prices;

-- Check that we can prune shards in subqueries with VARCHAR partition columns

CREATE TABLE subquery_pruning_varchar_test_table
(
   a varchar,
   b int
);

SELECT master_create_distributed_table('subquery_pruning_varchar_test_table', 'a', 'hash');
SELECT master_create_worker_shards('subquery_pruning_varchar_test_table', 4, 1);

SET client_min_messages TO DEBUG2;

SELECT * FROM
	(SELECT count(*) FROM subquery_pruning_varchar_test_table WHERE a = 'onder' GROUP BY a)
AS foo;

SELECT * FROM
	(SELECT count(*) FROM subquery_pruning_varchar_test_table WHERE 'eren' = a GROUP BY a)
AS foo;

SET client_min_messages TO NOTICE;

-- test subquery join on VARCHAR partition column
SELECT * FROM
	(SELECT
		a_inner AS a
	FROM
		(SELECT
			subquery_pruning_varchar_test_table.a AS a_inner
		FROM
		 	subquery_pruning_varchar_test_table
		GROUP BY
		  	subquery_pruning_varchar_test_table.a
		HAVING
		  	count(subquery_pruning_varchar_test_table.a) < 3)
		AS f1,

		(SELECT
		 	subquery_pruning_varchar_test_table.a
		FROM
		  	subquery_pruning_varchar_test_table
		GROUP BY
		  	subquery_pruning_varchar_test_table.a
		HAVING
		  	sum(coalesce(subquery_pruning_varchar_test_table.b,0)) > 20.0)
		AS f2
	WHERE
		f1.a_inner = f2.a
	GROUP BY
		a_inner)
AS foo;

DROP TABLE subquery_pruning_varchar_test_table;

-- Create composite type to use in subquery pushdown
CREATE TYPE user_composite_type AS
(
	tenant_id BIGINT,
	user_id BIGINT
);

CREATE FUNCTION user_composite_type_equal(user_composite_type, 
user_composite_type) 
returns boolean AS 'select $1.tenant_id = $2.tenant_id AND $1.user_id = $2.user_id;' language sql immutable
returns NULL ON NULL input; 


CREATE OR REPLACE FUNCTION user_composite_type_lt(v1 user_composite_type, v2 user_composite_type) returns boolean AS 
$$ 
BEGIN 
  if v1.tenant_id < v2.tenant_id THEN 
    return true; 
  end if;

    if  v1.tenant_id = v2.tenant_id AND v1.user_id < v2.user_id THEN 
        RETURN true;
    end if;

    RETURN false;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;


CREATE OR REPLACE FUNCTION user_composite_type_le(v1 user_composite_type, v2 user_composite_type) returns boolean AS 
$$ 
BEGIN 
  if v1.tenant_id < v2.tenant_id THEN 
    return true; 
  end if;

    if  v1.tenant_id = v2.tenant_id AND v1.user_id <= v2.user_id THEN 
        RETURN true;
    end if;

    RETURN false;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;


CREATE OR REPLACE FUNCTION user_composite_type_gt(v1 user_composite_type, v2 user_composite_type) returns boolean AS 
$$ 
BEGIN 
  if v1.tenant_id > v2.tenant_id THEN 
    return true; 
  end if;

    if  v1.tenant_id = v2.tenant_id AND v1.user_id > v2.user_id THEN 
        RETURN true;
    end if;

    RETURN false;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;


CREATE OR REPLACE FUNCTION user_composite_type_ge(v1 user_composite_type, v2 user_composite_type) returns boolean AS 
$$ 
BEGIN 
  if v1.tenant_id > v2.tenant_id THEN 
    return true; 
  end if;

    if  v1.tenant_id = v2.tenant_id AND v1.user_id >= v2.user_id THEN 
        RETURN true;
    end if;

    RETURN false;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;


CREATE OR REPLACE FUNCTION btree_comparison(v1 user_composite_type, v2 user_composite_type) returns integer AS 
$$ 
BEGIN 
  if v1.tenant_id = v2.tenant_id AND v1.user_id = v2.user_id THEN 
    return 0; 
  end if;

    if  v1.tenant_id > v2.tenant_id THEN 
        RETURN 1;
    end if;

    if v1.tenant_id < v2.tenant_id THEN 
        RETURN -1;
    end if;

    if  v1.user_id > v2.user_id THEN 
        RETURN 1;
    end if;

    if v1.user_id < v2.user_id THEN 
        RETURN -1;
    end if;


    RETURN 0;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;

CREATE operator = 
( leftarg = user_composite_type, rightarg = user_composite_type, 
PROCEDURE = user_composite_type_equal, 
commutator = =, 
RESTRICT = eqsel, 
JOIN = eqjoinsel, 
merges, 
hashes);

CREATE operator < 
(  
  leftarg = user_composite_type, rightarg = user_composite_type, 
  PROCEDURE = user_composite_type_lt
);

CREATE operator > 
( 
  leftarg = user_composite_type, rightarg = user_composite_type, 
  PROCEDURE = user_composite_type_gt
);

CREATE operator <= 
( 
   leftarg = user_composite_type, rightarg = user_composite_type, 
   PROCEDURE = user_composite_type_le
);

CREATE operator >= 
( 
    leftarg = user_composite_type, rightarg = user_composite_type, 
    PROCEDURE = user_composite_type_ge
);

CREATE FUNCTION user_composite_type_hash(user_composite_type)
returns int AS 'SELECT hashtext( ($1.tenant_id + $1.user_id)::text);' language sql immutable 
returns NULL ON NULL input;



CREATE OPERATOR CLASS btree_user_composite_ops
DEFAULT FOR TYPE user_composite_type USING btree
AS
        OPERATOR        1       <  ,
        OPERATOR        2       <= ,
        OPERATOR        3       =  ,
        OPERATOR        4       >= ,
        OPERATOR        5       >  ,
        FUNCTION        1       btree_comparison(user_composite_type, user_composite_type);


create operator class user_composite_type_hash_op_class DEFAULT FOR type user_composite_type using hash AS operator 1 = (user_composite_type, user_composite_type), FUNCTION 1 user_composite_type_hash(user_composite_type);



\c - - - :worker_1_port

CREATE TYPE user_composite_type AS
(
	tenant_id BIGINT,
	user_id BIGINT
);

CREATE FUNCTION user_composite_type_equal(user_composite_type, 
user_composite_type) 
returns boolean AS 'select $1.tenant_id = $2.tenant_id AND $1.user_id = $2.user_id;' language sql immutable
returns NULL ON NULL input; 


CREATE OR REPLACE FUNCTION user_composite_type_lt(v1 user_composite_type, v2 user_composite_type) returns boolean AS 
$$ 
BEGIN 
  if v1.tenant_id < v2.tenant_id THEN 
    return true; 
  end if;

    if  v1.tenant_id = v2.tenant_id AND v1.user_id < v2.user_id THEN 
        RETURN true;
    end if;

    RETURN false;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;


CREATE OR REPLACE FUNCTION user_composite_type_le(v1 user_composite_type, v2 user_composite_type) returns boolean AS 
$$ 
BEGIN 
  if v1.tenant_id < v2.tenant_id THEN 
    return true; 
  end if;

    if  v1.tenant_id = v2.tenant_id AND v1.user_id <= v2.user_id THEN 
        RETURN true;
    end if;

    RETURN false;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;


CREATE OR REPLACE FUNCTION user_composite_type_gt(v1 user_composite_type, v2 user_composite_type) returns boolean AS 
$$ 
BEGIN 
  if v1.tenant_id > v2.tenant_id THEN 
    return true; 
  end if;

    if  v1.tenant_id = v2.tenant_id AND v1.user_id > v2.user_id THEN 
        RETURN true;
    end if;

    RETURN false;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;


CREATE OR REPLACE FUNCTION user_composite_type_ge(v1 user_composite_type, v2 user_composite_type) returns boolean AS 
$$ 
BEGIN 
  if v1.tenant_id > v2.tenant_id THEN 
    return true; 
  end if;

    if  v1.tenant_id = v2.tenant_id AND v1.user_id >= v2.user_id THEN 
        RETURN true;
    end if;

    RETURN false;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;


CREATE OR REPLACE FUNCTION btree_comparison(v1 user_composite_type, v2 user_composite_type) returns integer AS 
$$ 
BEGIN 
  if v1.tenant_id = v2.tenant_id AND v1.user_id = v2.user_id THEN 
    return 0; 
  end if;

    if  v1.tenant_id > v2.tenant_id THEN 
        RETURN 1;
    end if;

    if v1.tenant_id < v2.tenant_id THEN 
        RETURN -1;
    end if;

    if  v1.user_id > v2.user_id THEN 
        RETURN 1;
    end if;

    if v1.user_id < v2.user_id THEN 
        RETURN -1;
    end if;
    
    RETURN 0;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;

CREATE operator = 
( leftarg = user_composite_type, rightarg = user_composite_type, 
PROCEDURE = user_composite_type_equal, 
commutator = =, 
RESTRICT = eqsel, 
JOIN = eqjoinsel, 
merges, 
hashes);

CREATE operator < 
(  
  leftarg = user_composite_type, rightarg = user_composite_type, 
  PROCEDURE = user_composite_type_lt
);

CREATE operator > 
( 
  leftarg = user_composite_type, rightarg = user_composite_type, 
  PROCEDURE = user_composite_type_gt
);

CREATE operator <= 
( 
   leftarg = user_composite_type, rightarg = user_composite_type, 
   PROCEDURE = user_composite_type_le
);

CREATE operator >= 
( 
    leftarg = user_composite_type, rightarg = user_composite_type, 
    PROCEDURE = user_composite_type_ge
);

CREATE FUNCTION user_composite_type_hash(user_composite_type)
returns int AS 'SELECT hashtext( ($1.tenant_id + $1.user_id)::text);' language sql immutable 
returns NULL ON NULL input;



CREATE OPERATOR CLASS btree_user_composite_ops
DEFAULT FOR TYPE user_composite_type USING btree
AS
        OPERATOR        1       <  ,
        OPERATOR        2       <= ,
        OPERATOR        3       =  ,
        OPERATOR        4       >= ,
        OPERATOR        5       >  ,
        FUNCTION        1       btree_comparison(user_composite_type, user_composite_type);


create operator class user_composite_type_hash_op_class DEFAULT FOR type user_composite_type using hash AS operator 1 = (user_composite_type, user_composite_type), FUNCTION 1 user_composite_type_hash(user_composite_type);


\c - - - :worker_2_port

CREATE TYPE user_composite_type AS
(
	tenant_id BIGINT,
	user_id BIGINT
);

CREATE FUNCTION user_composite_type_equal(user_composite_type, 
user_composite_type) 
returns boolean AS 'select $1.tenant_id = $2.tenant_id AND $1.user_id = $2.user_id;' language sql immutable
returns NULL ON NULL input; 


CREATE OR REPLACE FUNCTION user_composite_type_lt(v1 user_composite_type, v2 user_composite_type) returns boolean AS 
$$ 
BEGIN 
  if v1.tenant_id < v2.tenant_id THEN 
    return true; 
  end if;

    if  v1.tenant_id = v2.tenant_id AND v1.user_id < v2.user_id THEN 
        RETURN true;
    end if;

    RETURN false;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;


CREATE OR REPLACE FUNCTION user_composite_type_le(v1 user_composite_type, v2 user_composite_type) returns boolean AS 
$$ 
BEGIN 
  if v1.tenant_id < v2.tenant_id THEN 
    return true; 
  end if;

    if  v1.tenant_id = v2.tenant_id AND v1.user_id <= v2.user_id THEN 
        RETURN true;
    end if;

    RETURN false;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;


CREATE OR REPLACE FUNCTION user_composite_type_gt(v1 user_composite_type, v2 user_composite_type) returns boolean AS 
$$ 
BEGIN 
  if v1.tenant_id > v2.tenant_id THEN 
    return true; 
  end if;

    if  v1.tenant_id = v2.tenant_id AND v1.user_id > v2.user_id THEN 
        RETURN true;
    end if;

    RETURN false;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;


CREATE OR REPLACE FUNCTION user_composite_type_ge(v1 user_composite_type, v2 user_composite_type) returns boolean AS 
$$ 
BEGIN 
  if v1.tenant_id > v2.tenant_id THEN 
    return true; 
  end if;

    if  v1.tenant_id = v2.tenant_id AND v1.user_id >= v2.user_id THEN 
        RETURN true;
    end if;

    RETURN false;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;


CREATE OR REPLACE FUNCTION btree_comparison(v1 user_composite_type, v2 user_composite_type) returns integer AS 
$$ 
BEGIN 
  if v1.tenant_id = v2.tenant_id AND v1.user_id = v2.user_id THEN 
    return 0; 
  end if;

    if  v1.tenant_id > v2.tenant_id THEN 
        RETURN 1;
    end if;

    if v1.tenant_id < v2.tenant_id THEN 
        RETURN -1;
    end if;

    if  v1.user_id > v2.user_id THEN 
        RETURN 1;
    end if;

    if v1.user_id < v2.user_id THEN 
        RETURN -1;
    end if;

    RETURN 0;
END;
$$ language 'plpgsql' immutable 
returns NULL ON NULL input;

CREATE operator = 
( leftarg = user_composite_type, rightarg = user_composite_type, 
PROCEDURE = user_composite_type_equal, 
commutator = =, 
RESTRICT = eqsel, 
JOIN = eqjoinsel, 
merges, 
hashes);

CREATE operator < 
(  
  leftarg = user_composite_type, rightarg = user_composite_type, 
  PROCEDURE = user_composite_type_lt
);

CREATE operator > 
( 
  leftarg = user_composite_type, rightarg = user_composite_type, 
  PROCEDURE = user_composite_type_gt
);

CREATE operator <= 
( 
   leftarg = user_composite_type, rightarg = user_composite_type, 
   PROCEDURE = user_composite_type_le
);

CREATE operator >= 
( 
    leftarg = user_composite_type, rightarg = user_composite_type, 
    PROCEDURE = user_composite_type_ge
);

CREATE FUNCTION user_composite_type_hash(user_composite_type)
returns int AS 'SELECT hashtext( ($1.tenant_id + $1.user_id)::text);' language sql immutable 
returns NULL ON NULL input;



CREATE OPERATOR CLASS btree_user_composite_ops
DEFAULT FOR TYPE user_composite_type USING btree
AS
        OPERATOR        1       <  ,
        OPERATOR        2       <= ,
        OPERATOR        3       =  ,
        OPERATOR        4       >= ,
        OPERATOR        5       >  ,
        FUNCTION        1       btree_comparison(user_composite_type, user_composite_type);


create operator class user_composite_type_hash_op_class DEFAULT FOR type user_composite_type using hash AS operator 1 = (user_composite_type, user_composite_type), FUNCTION 1 user_composite_type_hash(user_composite_type);


\c - - - :master_port


CREATE TABLE events (
	composite_id user_composite_type,
	event_id bigint,
	event_type character varying(255),
	event_time bigint
);
SELECT master_create_distributed_table('events', 'composite_id', 'range');

SELECT master_create_empty_shard('events') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = '(1,1)', shardmaxvalue = '(1,2000000000)'
WHERE shardid = :new_shard_id;

SELECT master_create_empty_shard('events') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = '(1,2000000001)', shardmaxvalue = '(1,4300000000)'
WHERE shardid = :new_shard_id;

SELECT master_create_empty_shard('events') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = '(2,1)', shardmaxvalue = '(2,2000000000)'
WHERE shardid = :new_shard_id;

SELECT master_create_empty_shard('events') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = '(2,2000000001)', shardmaxvalue = '(2,4300000000)'
WHERE shardid = :new_shard_id;

\COPY events FROM STDIN WITH CSV
"(1,1001)",20001,click,1472807012
"(1,1001)",20002,submit,1472807015
"(1,1001)",20003,pay,1472807020
"(1,1002)",20010,click,1472807022
"(1,1002)",20011,click,1472807023
"(1,1002)",20012,submit,1472807025
"(1,1002)",20013,pay,1472807030
"(1,1003)",20014,click,1472807032
"(1,1003)",20015,click,1472807033
"(1,1003)",20016,click,1472807034
"(1,1003)",20017,submit,1472807035
\.

CREATE TABLE users (
	composite_id user_composite_type,
	lastseen bigint
);
SELECT master_create_distributed_table('users', 'composite_id', 'range');

SELECT master_create_empty_shard('users') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = '(1,1)', shardmaxvalue = '(1,2000000000)'
WHERE shardid = :new_shard_id;

SELECT master_create_empty_shard('users') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = '(1,2000000001)', shardmaxvalue = '(1,4300000000)'
WHERE shardid = :new_shard_id;

SELECT master_create_empty_shard('users') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = '(2,1)', shardmaxvalue = '(2,2000000000)'
WHERE shardid = :new_shard_id;

SELECT master_create_empty_shard('users') AS new_shard_id
\gset
UPDATE pg_dist_shard SET shardminvalue = '(2,2000000001)', shardmaxvalue = '(2,4300000000)'
WHERE shardid = :new_shard_id;

\COPY users FROM STDIN WITH CSV
"(1,1001)",1472807115
"(1,1002)",1472807215
"(1,1003)",1472807315
\.


-- Simple join subquery pushdown
SELECT
	avg(array_length(events, 1)) AS event_average
FROM
	(SELECT
		tenant_id,
		user_id,
		array_agg(event_type ORDER BY event_time) AS events
	FROM
		(SELECT
			(users.composite_id).tenant_id,
			(users.composite_id).user_id,
			event_type,
			events.event_time
		FROM
			users,
			events
		WHERE
			(users.composite_id) = (events.composite_id) AND
			users.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			users.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
			event_type IN ('click', 'submit', 'pay')) AS subquery
	GROUP BY
		tenant_id,
		user_id) AS subquery;

-- Union and left join subquery pushdown
SELECT
	avg(array_length(events, 1)) AS event_average,
	hasdone
FROM
	(SELECT
		subquery_1.tenant_id,
		subquery_1.user_id,
		array_agg(event ORDER BY event_time) AS events,
		COALESCE(hasdone, 'Has not done paying') AS hasdone
	FROM
	(
		(SELECT
			(users.composite_id).tenant_id,
			(users.composite_id).user_id,
			(users.composite_id) as composite_id,
			'action=>1'AS event,
			events.event_time
		FROM
			users,
			events
		WHERE
			(users.composite_id) = (events.composite_id) AND
			users.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			users.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
			event_type = 'click')
		UNION
		(SELECT
			(users.composite_id).tenant_id,
			(users.composite_id).user_id,
			(users.composite_id) as composite_id,
			'action=>2'AS event,
			events.event_time
		FROM
			users,
			events
		WHERE
			(users.composite_id) = (events.composite_id) AND
			users.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			users.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
			event_type = 'submit')
	) AS subquery_1
	LEFT JOIN
	(SELECT
		DISTINCT ON ((composite_id).tenant_id, (composite_id).user_id) composite_id,
		(composite_id).tenant_id,
		(composite_id).user_id,
		'Has done paying'::TEXT AS hasdone
	FROM
		events
	WHERE
		events.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
		events.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
		event_type = 'pay') AS subquery_2
	ON
		subquery_1.composite_id = subquery_2.composite_id
	GROUP BY
		subquery_1.tenant_id,
		subquery_1.user_id,
		hasdone) AS subquery_top
GROUP BY
	hasdone;

-- Union, left join and having subquery pushdown
SELECT
	avg(array_length(events, 1)) AS event_average,
	count_pay
	FROM (
  SELECT
	subquery_1.tenant_id,
	subquery_1.user_id,
	array_agg(event ORDER BY event_time) AS events,
	COALESCE(count_pay, 0) AS count_pay
  FROM
	(
		(SELECT
			(users.composite_id).tenant_id,
			(users.composite_id).user_id,
			(users.composite_id),
			'action=>1'AS event,
			events.event_time
		FROM
			users,
			events
		WHERE
			(users.composite_id) = (events.composite_id) AND
			users.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			users.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
			event_type = 'click')
		UNION
		(SELECT
			(users.composite_id).tenant_id,
			(users.composite_id).user_id,
			(users.composite_id),
			'action=>2'AS event,
			events.event_time
		FROM
			users,
			events
		WHERE
			(users.composite_id) = (events.composite_id) AND
			users.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			users.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
			event_type = 'submit')
	) AS subquery_1
	LEFT JOIN
		(SELECT
			(composite_id).tenant_id,
			(composite_id).user_id,
			composite_id,
			COUNT(*) AS count_pay
		FROM
			events
		WHERE
			events.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			events.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
			event_type = 'pay'
		GROUP BY
			composite_id
		HAVING
			COUNT(*) > 2) AS subquery_2
	ON
		subquery_1.composite_id = subquery_2.composite_id
	GROUP BY
		subquery_1.tenant_id,
		subquery_1.user_id,
		count_pay) AS subquery_top
WHERE
	array_ndims(events) > 0
GROUP BY
	count_pay
ORDER BY
	count_pay;
	
-- Lateral join subquery pushdown
-- set subquery_pushdown since there is limit in the query
SET citus.subquery_pushdown to ON;
SELECT
	tenant_id,
	user_id,
	user_lastseen,
	event_array
FROM
	(SELECT
		tenant_id,
		user_id,
		max(lastseen) as user_lastseen,
		array_agg(event_type ORDER BY event_time) AS event_array
	FROM
		(SELECT
			(composite_id).tenant_id,
			(composite_id).user_id,
			composite_id,
			lastseen
		FROM
			users
		WHERE
			composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			composite_id <= '(1, 9223372036854775807)'::user_composite_type
		ORDER BY
			lastseen DESC
		LIMIT
			10
		) AS subquery_top
		LEFT JOIN LATERAL
			(SELECT
				event_type,
				event_time
			FROM
				events
			WHERE
				(composite_id) = subquery_top.composite_id
			ORDER BY
				event_time DESC
			LIMIT
				99) AS subquery_lateral
		ON
			true
		GROUP BY
			tenant_id,
			user_id
	) AS shard_union
ORDER BY
	user_lastseen DESC
LIMIT
	10;
-- reset the flag for next query
SET citus.subquery_pushdown to OFF;

-- Same queries above with explain
-- Simple join subquery pushdown

EXPLAIN (COSTS OFF)
SELECT
	avg(array_length(events, 1)) AS event_average
FROM
	(SELECT
		tenant_id,
		user_id,
		array_agg(event_type ORDER BY event_time) AS events
	FROM
		(SELECT
			(users.composite_id).tenant_id,
			(users.composite_id).user_id,
			event_type,
			events.event_time
		FROM
			users,
			events
		WHERE
			(users.composite_id) = (events.composite_id) AND
			users.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			users.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
			event_type IN ('click', 'submit', 'pay')) AS subquery
	GROUP BY
		tenant_id,
		user_id) AS subquery;

-- Union and left join subquery pushdown
EXPLAIN (COSTS OFF)
SELECT
	avg(array_length(events, 1)) AS event_average,
	hasdone
FROM
	(SELECT
		subquery_1.tenant_id,
		subquery_1.user_id,
		array_agg(event ORDER BY event_time) AS events,
		COALESCE(hasdone, 'Has not done paying') AS hasdone
	FROM
	(
		(SELECT
			(users.composite_id).tenant_id,
			(users.composite_id).user_id,
			(users.composite_id) as composite_id,
			'action=>1'AS event,
			events.event_time
		FROM
			users,
			events
		WHERE
			(users.composite_id) = (events.composite_id) AND
			users.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			users.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
			event_type = 'click')
		UNION
		(SELECT
			(users.composite_id).tenant_id,
			(users.composite_id).user_id,
			(users.composite_id) as composite_id,
			'action=>2'AS event,
			events.event_time
		FROM
			users,
			events
		WHERE
			(users.composite_id) = (events.composite_id) AND
			users.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			users.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
			event_type = 'submit')
	) AS subquery_1
	LEFT JOIN
	(SELECT
		DISTINCT ON ((composite_id).tenant_id, (composite_id).user_id) composite_id,
		(composite_id).tenant_id,
		(composite_id).user_id,
		'Has done paying'::TEXT AS hasdone
	FROM
		events
	WHERE
		events.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
		events.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
		event_type = 'pay') AS subquery_2
	ON
		subquery_1.composite_id = subquery_2.composite_id
	GROUP BY
		subquery_1.tenant_id,
		subquery_1.user_id,
		hasdone) AS subquery_top
GROUP BY
	hasdone;

-- Union, left join and having subquery pushdown
EXPLAIN (COSTS OFF)
  SELECT
	avg(array_length(events, 1)) AS event_average,
	count_pay
	FROM (
  SELECT
	subquery_1.tenant_id,
	subquery_1.user_id,
	array_agg(event ORDER BY event_time) AS events,
	COALESCE(count_pay, 0) AS count_pay
  FROM
	(
		(SELECT
			(users.composite_id).tenant_id,
			(users.composite_id).user_id,
			(users.composite_id),
			'action=>1'AS event,
			events.event_time
		FROM
			users,
			events
		WHERE
			(users.composite_id) = (events.composite_id) AND
			users.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			users.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
			event_type = 'click')
		UNION
		(SELECT
			(users.composite_id).tenant_id,
			(users.composite_id).user_id,
			(users.composite_id),
			'action=>2'AS event,
			events.event_time
		FROM
			users,
			events
		WHERE
			(users.composite_id) = (events.composite_id) AND
			users.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			users.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
			event_type = 'submit')
	) AS subquery_1
	LEFT JOIN
		(SELECT
			(composite_id).tenant_id,
			(composite_id).user_id,
			composite_id,
			COUNT(*) AS count_pay
		FROM
			events
		WHERE
			events.composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			events.composite_id <= '(1, 9223372036854775807)'::user_composite_type AND
			event_type = 'pay'
		GROUP BY
			composite_id
		HAVING
			COUNT(*) > 2) AS subquery_2
	ON
		subquery_1.composite_id = subquery_2.composite_id
	GROUP BY
		subquery_1.tenant_id,
		subquery_1.user_id,
		count_pay) AS subquery_top
WHERE
	array_ndims(events) > 0
GROUP BY
	count_pay
ORDER BY
	count_pay;

-- Lateral join subquery pushdown
-- set subquery_pushdown due to limit in the query
SET citus.subquery_pushdown to ON;
EXPLAIN (COSTS OFF)
SELECT
	tenant_id,
	user_id,
	user_lastseen,
	event_array
FROM
	(SELECT
		tenant_id,
		user_id,
		max(lastseen) as user_lastseen,
		array_agg(event_type ORDER BY event_time) AS event_array
	FROM
		(SELECT
			(composite_id).tenant_id,
			(composite_id).user_id,
			composite_id,
			lastseen
		FROM
			users
		WHERE
			composite_id >= '(1, -9223372036854775808)'::user_composite_type AND
			composite_id <= '(1, 9223372036854775807)'::user_composite_type
		ORDER BY
			lastseen DESC
		LIMIT
			10
		) AS subquery_top
		LEFT JOIN LATERAL
			(SELECT
				event_type,
				event_time
			FROM
				events
			WHERE
				(composite_id) = subquery_top.composite_id
			ORDER BY
				event_time DESC
			LIMIT
				99) AS subquery_lateral
		ON
			true
		GROUP BY
			tenant_id,
			user_id
	) AS shard_union
ORDER BY
	user_lastseen DESC
LIMIT
	10;
SET citus.subquery_pushdown to OFF;
SET citus.enable_router_execution TO 'true';