#   Copyright 2016, Quickstep Research Group, Computer Sciences Department,
#     University of Wisconsin—Madison.
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.

# Prepare testing relations
CREATE TABLE a(w INT, x LONG, y DOUBLE, z VARCHAR(16));
CREATE TABLE b(w INT, x LONG);
CREATE TABLE c(x LONG, y DOUBLE);
CREATE TABLE d(y DOUBLE, z VARCHAR(16));

INSERT INTO a VALUES(0, 0, 0, 'C0');
INSERT INTO a VALUES(1, 10, 100, 'C1');
INSERT INTO a VALUES(2, 20, 200, 'C2');
INSERT INTO a VALUES(3, 30, 300, 'C3');
INSERT INTO a VALUES(4, 40, 400, 'C4');
INSERT INTO a VALUES(5, 50, 500, 'C5');
INSERT INTO a VALUES(6, 60, 600, 'C6');
INSERT INTO a VALUES(7, 70, 700, 'C7');
INSERT INTO a VALUES(8, 80, 800, 'C8');
INSERT INTO a VALUES(9, 90, 900, 'C9');
INSERT INTO a VALUES(10, 100, 1000, 'C10');
INSERT INTO a VALUES(11, 110, 1100, 'C11');
INSERT INTO a VALUES(12, 120, 1200, 'C12');
INSERT INTO a VALUES(13, 130, 1300, 'C13');
INSERT INTO a VALUES(14, 140, 1400, 'C14');
INSERT INTO a VALUES(15, 150, 1500, 'C15');
INSERT INTO a VALUES(16, 160, 1600, 'C16');
INSERT INTO a VALUES(17, 170, 1700, 'C17');
INSERT INTO a VALUES(18, 180, 1800, 'C18');
INSERT INTO a VALUES(19, 190, 1900, 'C19');

INSERT INTO b
SELECT w, x + (w/2)%2
FROM a
WHERE w % 2 = 0;

INSERT INTO c
SELECT x, y + (x/3)%3-1
FROM a
WHERE x % 3 = 0;

INSERT INTO d
SELECT y, z
FROM a;
--
==


# Join queries
SELECT a.w, b.x, c.y, d.z
FROM a JOIN b ON a.w = b.w
       JOIN c ON a.x = c.x
       JOIN d ON a.y = d.y;
--
+-----------+--------------------+------------------------+----------------+
|w          |x                   |y                       |z               |
+-----------+--------------------+------------------------+----------------+
|          0|                   0|                      -1|              C0|
|          6|                  61|                     601|              C6|
|         12|                 120|                    1200|             C12|
|         18|                 181|                    1799|             C18|
+-----------+--------------------+------------------------+----------------+
==

SELECT a.w, b.x, c.y
FROM a JOIN b ON (a.w = b.w OR a.x > b.x)
       JOIN c ON (a.x = c.x AND a.y > c.y)
       JOIN d ON (a.y = d.y OR a.z > d.z)
GROUP BY a.w, b.x, c.y
ORDER BY a.w, b.x, c.y;
--
+-----------+--------------------+------------------------+
|w          |x                   |y                       |
+-----------+--------------------+------------------------+
|          0|                   0|                      -1|
|          9|                   0|                     899|
|          9|                  21|                     899|
|          9|                  40|                     899|
|          9|                  61|                     899|
|          9|                  80|                     899|
|         18|                   0|                    1799|
|         18|                  21|                    1799|
|         18|                  40|                    1799|
|         18|                  61|                    1799|
|         18|                  80|                    1799|
|         18|                 101|                    1799|
|         18|                 120|                    1799|
|         18|                 141|                    1799|
|         18|                 160|                    1799|
|         18|                 181|                    1799|
+-----------+--------------------+------------------------+
==

SELECT a1.w, b1.x, c1.y, d1.z
FROM a AS a1 JOIN b AS b1 ON a1.w = b1.w
             JOIN c AS c1 ON a1.x = c1.x
             JOIN d AS d1 ON a1.y = d1.y
WHERE a1.x = b1.x
  AND a1.y = c1.y
  AND a1.z = d1.z;
--
+-----------+--------------------+------------------------+----------------+
|w          |x                   |y                       |z               |
+-----------+--------------------+------------------------+----------------+
|         12|                 120|                    1200|             C12|
+-----------+--------------------+------------------------+----------------+
==

SELECT a1.w, b1.x, c1.y, d1.z
FROM a AS a1 JOIN b AS b1 ON a1.x <> b1.x
             JOIN c AS c1 ON a1.y <> c1.y
             JOIN d AS d1 ON a1.z = d1.z
WHERE a1.w = b1.w
  AND a1.x = c1.x;
--
+-----------+--------------------+------------------------+----------------+
|w          |x                   |y                       |z               |
+-----------+--------------------+------------------------+----------------+
|          6|                  61|                     601|              C6|
|         18|                 181|                    1799|             C18|
+-----------+--------------------+------------------------+----------------+
==

SELECT a.w AS "a.w", b.x AS "b.x", c.y AS "c.y", d.z AS "d.z"
FROM a LEFT JOIN b ON a.w = b.w
       LEFT JOIN c ON a.x = c.x
       LEFT JOIN d ON a.y = d.y
ORDER BY a.w;
--
+-----------+--------------------+------------------------+----------------+
|a.w        |b.x                 |c.y                     |d.z             |
+-----------+--------------------+------------------------+----------------+
|          0|                   0|                      -1|              C0|
|          1|                NULL|                    NULL|              C1|
|          2|                  21|                    NULL|              C2|
|          3|                NULL|                     300|              C3|
|          4|                  40|                    NULL|              C4|
|          5|                NULL|                    NULL|              C5|
|          6|                  61|                     601|              C6|
|          7|                NULL|                    NULL|              C7|
|          8|                  80|                    NULL|              C8|
|          9|                NULL|                     899|              C9|
|         10|                 101|                    NULL|             C10|
|         11|                NULL|                    NULL|             C11|
|         12|                 120|                    1200|             C12|
|         13|                NULL|                    NULL|             C13|
|         14|                 141|                    NULL|             C14|
|         15|                NULL|                    1501|             C15|
|         16|                 160|                    NULL|             C16|
|         17|                NULL|                    NULL|             C17|
|         18|                 181|                    1799|             C18|
|         19|                NULL|                    NULL|             C19|
+-----------+--------------------+------------------------+----------------+
==

SELECT a.w AS "a.w", b.x AS "b.x", c.y AS "c.y", d.z AS "d.z"
FROM a LEFT JOIN b ON a.w = b.w
       LEFT JOIN c ON b.x = c.x
       LEFT JOIN d ON c.y = d.y
ORDER BY a.w;
--
+-----------+--------------------+------------------------+----------------+
|a.w        |b.x                 |c.y                     |d.z             |
+-----------+--------------------+------------------------+----------------+
|          0|                   0|                      -1|            NULL|
|          1|                NULL|                    NULL|            NULL|
|          2|                  21|                    NULL|            NULL|
|          3|                NULL|                    NULL|            NULL|
|          4|                  40|                    NULL|            NULL|
|          5|                NULL|                    NULL|            NULL|
|          6|                  61|                    NULL|            NULL|
|          7|                NULL|                    NULL|            NULL|
|          8|                  80|                    NULL|            NULL|
|          9|                NULL|                    NULL|            NULL|
|         10|                 101|                    NULL|            NULL|
|         11|                NULL|                    NULL|            NULL|
|         12|                 120|                    1200|             C12|
|         13|                NULL|                    NULL|            NULL|
|         14|                 141|                    NULL|            NULL|
|         15|                NULL|                    NULL|            NULL|
|         16|                 160|                    NULL|            NULL|
|         17|                NULL|                    NULL|            NULL|
|         18|                 181|                    NULL|            NULL|
|         19|                NULL|                    NULL|            NULL|
+-----------+--------------------+------------------------+----------------+
==

SELECT b.x AS "b.x", c1.x AS "c1.x", c2.x AS "c2.x"
FROM b LEFT JOIN c c1 ON (b.x = c1.x)
       LEFT JOIN c c2 ON (b.x = c2.x AND c2.x > 10)
ORDER BY b.x;
--
+--------------------+--------------------+--------------------+
|b.x                 |c1.x                |c2.x                |
+--------------------+--------------------+--------------------+
|                   0|                   0|                NULL|
|                  21|                NULL|                NULL|
|                  40|                NULL|                NULL|
|                  61|                NULL|                NULL|
|                  80|                NULL|                NULL|
|                 101|                NULL|                NULL|
|                 120|                 120|                 120|
|                 141|                NULL|                NULL|
|                 160|                NULL|                NULL|
|                 181|                NULL|                NULL|
+--------------------+--------------------+--------------------+
==

SELECT a.w AS "a.w", b.x AS "b.x", c.y AS "c.y", d.z AS "d.z"
FROM a RIGHT JOIN b ON a.w = b.w
       JOIN c ON a.x = c.x
       LEFT JOIN d ON a.y = d.y
WHERE b.x > 10
  AND c.y < 1000;
--
+-----------+--------------------+------------------------+----------------+
|a.w        |b.x                 |c.y                     |d.z             |
+-----------+--------------------+------------------------+----------------+
|          6|                  61|                     601|              C6|
+-----------+--------------------+------------------------+----------------+