# 2005 September 19
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file implements tests for left outer joins containing ON
# clauses that restrict the scope of the left term of the join.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix join5


do_test join5-1.1 {
  execsql {
    BEGIN;
    CREATE TABLE t1(a integer primary key, b integer, c integer);
    CREATE TABLE t2(x integer primary key, y);
    CREATE TABLE t3(p integer primary key, q);
    INSERT INTO t3 VALUES(11,'t3-11');
    INSERT INTO t3 VALUES(12,'t3-12');
    INSERT INTO t2 VALUES(11,'t2-11');
    INSERT INTO t2 VALUES(12,'t2-12');
    INSERT INTO t1 VALUES(1, 5, 0);
    INSERT INTO t1 VALUES(2, 11, 2);
    INSERT INTO t1 VALUES(3, 12, 1);
    COMMIT;
  }
} {}
do_test join5-1.2 {
  execsql {
    select * from t1 left join t2 on t1.b=t2.x and t1.c=1
  }
} {1 5 0 {} {} 2 11 2 {} {} 3 12 1 12 t2-12}
do_test join5-1.3 {
  execsql {
    select * from t1 left join t2 on t1.b=t2.x where t1.c=1
  }
} {3 12 1 12 t2-12}
do_test join5-1.4 {
  execsql {
    select * from t1 left join t2 on t1.b=t2.x and t1.c=1
                     left join t3 on t1.b=t3.p and t1.c=2
  }
} {1 5 0 {} {} {} {} 2 11 2 {} {} 11 t3-11 3 12 1 12 t2-12 {} {}}
do_test join5-1.5 {
  execsql {
    select * from t1 left join t2 on t1.b=t2.x and t1.c=1
                     left join t3 on t1.b=t3.p where t1.c=2
  }
} {2 11 2 {} {} 11 t3-11}

# Ticket #2403
#
do_test join5-2.1 {
  execsql {
    CREATE TABLE ab(a,b);
    INSERT INTO "ab" VALUES(1,2);
    INSERT INTO "ab" VALUES(3,NULL);

    CREATE TABLE xy(x,y);
    INSERT INTO "xy" VALUES(2,3);
    INSERT INTO "xy" VALUES(NULL,1);
  }
  execsql {SELECT * FROM xy LEFT JOIN ab ON 0}
} {2 3 {} {} {} 1 {} {}}
do_test join5-2.2 {
  execsql {SELECT * FROM xy LEFT JOIN ab ON 1}
} {2 3 1 2 2 3 3 {} {} 1 1 2 {} 1 3 {}}
do_test join5-2.3 {
  execsql {SELECT * FROM xy LEFT JOIN ab ON NULL}
} {2 3 {} {} {} 1 {} {}}
do_test join5-2.4 {
  execsql {SELECT * FROM xy LEFT JOIN ab ON 0 WHERE 0}
} {}
do_test join5-2.5 {
  execsql {SELECT * FROM xy LEFT JOIN ab ON 1 WHERE 0}
} {}
do_test join5-2.6 {
  execsql {SELECT * FROM xy LEFT JOIN ab ON NULL WHERE 0}
} {}
do_test join5-2.7 {
  execsql {SELECT * FROM xy LEFT JOIN ab ON 0 WHERE 1}
} {2 3 {} {} {} 1 {} {}}
do_test join5-2.8 {
  execsql {SELECT * FROM xy LEFT JOIN ab ON 1 WHERE 1}
} {2 3 1 2 2 3 3 {} {} 1 1 2 {} 1 3 {}}
do_test join5-2.9 {
  execsql {SELECT * FROM xy LEFT JOIN ab ON NULL WHERE 1}
} {2 3 {} {} {} 1 {} {}}
do_test join5-2.10 {
  execsql {SELECT * FROM xy LEFT JOIN ab ON 0 WHERE NULL}
} {}
do_test join5-2.11 {
  execsql {SELECT * FROM xy LEFT JOIN ab ON 1 WHERE NULL}
} {}
do_test join5-2.12 {
  execsql {SELECT * FROM xy LEFT JOIN ab ON NULL WHERE NULL}
} {}

# Ticket https://www.sqlite.org/src/tktview/6f2222d550f5b0ee7ed37601
# Incorrect output on a LEFT JOIN.
#
do_execsql_test join5-3.1 {
  DROP TABLE IF EXISTS t1;
  DROP TABLE IF EXISTS t2;
  DROP TABLE IF EXISTS t3;
  CREATE TABLE x1(a);
  INSERT INTO x1 VALUES(1);
  CREATE TABLE x2(b NOT NULL);
  CREATE TABLE x3(c, d);
  INSERT INTO x3 VALUES('a', NULL);
  INSERT INTO x3 VALUES('b', NULL);
  INSERT INTO x3 VALUES('c', NULL);
  SELECT * FROM x1 LEFT JOIN x2 LEFT JOIN x3 ON x3.d = x2.b;
} {1 {} {} {}}
do_execsql_test join5-3.2 {
  DROP TABLE IF EXISTS t1;
  DROP TABLE IF EXISTS t2;
  DROP TABLE IF EXISTS t3;
  DROP TABLE IF EXISTS t4;
  DROP TABLE IF EXISTS t5;
  CREATE TABLE t1(x text NOT NULL, y text);
  CREATE TABLE t2(u text NOT NULL, x text NOT NULL);
  CREATE TABLE t3(w text NOT NULL, v text);
  CREATE TABLE t4(w text NOT NULL, z text NOT NULL);
  CREATE TABLE t5(z text NOT NULL, m text);
  INSERT INTO t1 VALUES('f6d7661f-4efe-4c90-87b5-858e61cd178b',NULL);
  INSERT INTO t1 VALUES('f6ea82c3-2cad-45ce-ae8f-3ddca4fb2f48',NULL);
  INSERT INTO t1 VALUES('f6f47499-ecb4-474b-9a02-35be73c235e5',NULL);
  INSERT INTO t1 VALUES('56f47499-ecb4-474b-9a02-35be73c235e5',NULL);
  INSERT INTO t3 VALUES('007f2033-cb20-494c-b135-a1e4eb66130c',
                        'f6d7661f-4efe-4c90-87b5-858e61cd178b');
  SELECT *
    FROM t3
         INNER JOIN t1 ON t1.x= t3.v AND t1.y IS NULL
         LEFT JOIN t4  ON t4.w = t3.w
         LEFT JOIN t5  ON t5.z = t4.z
         LEFT JOIN t2  ON t2.u = t5.m
         LEFT JOIN t1 xyz ON xyz.y = t2.x;
} {007f2033-cb20-494c-b135-a1e4eb66130c f6d7661f-4efe-4c90-87b5-858e61cd178b f6d7661f-4efe-4c90-87b5-858e61cd178b {} {} {} {} {} {} {} {} {}}
do_execsql_test join5-3.3 {
  DROP TABLE IF EXISTS x1;
  DROP TABLE IF EXISTS x2;
  DROP TABLE IF EXISTS x3;
  CREATE TABLE x1(a);
  INSERT INTO x1 VALUES(1);
  CREATE TABLE x2(b NOT NULL);
  CREATE TABLE x3(c, d);
  INSERT INTO x3 VALUES('a', NULL);
  INSERT INTO x3 VALUES('b', NULL);
  INSERT INTO x3 VALUES('c', NULL);
  SELECT * FROM x1 LEFT JOIN x2 JOIN x3 WHERE x3.d = x2.b;
} {}

# Ticket https://www.sqlite.org/src/tktview/c2a19d81652f40568c770c43 on
# 2015-08-20.  LEFT JOIN and the push-down optimization.
#
do_execsql_test join6-4.1 {
  SELECT *
  FROM (
      SELECT 'apple' fruit
      UNION ALL SELECT 'banana'
  ) a
  JOIN (
      SELECT 'apple' fruit
      UNION ALL SELECT 'banana'
  ) b ON a.fruit=b.fruit
  LEFT JOIN (
      SELECT 1 isyellow
  ) c ON b.fruit='banana';
} {apple apple {} banana banana 1}
do_execsql_test join6-4.2 {
  SELECT *
    FROM (SELECT 'apple' fruit UNION ALL SELECT 'banana')
         LEFT JOIN (SELECT 1) ON fruit='banana';
} {apple {} banana 1}

#-------------------------------------------------------------------------
do_execsql_test 5.0 {
  CREATE TABLE y1(x, y, z);
  INSERT INTO y1 VALUES(0, 0, 1);
  CREATE TABLE y2(a);
}

do_execsql_test 5.1 {
  SELECT count(z) FROM y1 LEFT JOIN y2 ON x GROUP BY y;
} 1

do_execsql_test 5.2 {
  SELECT count(z) FROM ( SELECT * FROM y1 ) LEFT JOIN y2 ON x GROUP BY y;
} 1

do_execsql_test 5.3 {
  CREATE VIEW v1 AS SELECT x, y, z FROM y1;
  SELECT count(z) FROM v1 LEFT JOIN y2 ON x GROUP BY y;
} 1

do_execsql_test 5.4 {
  SELECT count(z) FROM ( SELECT * FROM y1 ) LEFT JOIN y2 ON x
} 1

do_execsql_test 5.5 {
  SELECT * FROM ( SELECT * FROM y1 ) LEFT JOIN y2 ON x
} {0 0 1 {}}

finish_test