# 2019 August 10
#
# 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.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix nulls1

do_execsql_test 1.0 {
  DROP TABLE IF EXISTS t3;
  CREATE TABLE t3(a INTEGER);
  INSERT INTO t3 VALUES(NULL), (10), (30), (20), (NULL);
} {}

for {set a 0} {$a < 3} {incr a} {
  foreach {tn limit} {
    1 ""
    2 "LIMIT 10"
  } {
    do_execsql_test 1.$a.$tn.1 "
      SELECT a FROM t3 ORDER BY a nULLS FIRST $limit
    " {{}   {}   10   20   30}
    
    do_execsql_test 1.$a.$tn.2 "
      SELECT a FROM t3 ORDER BY a nULLS LAST $limit
    " {10   20   30   {}   {}}
    
    do_execsql_test 1.$a.$tn.3 "
      SELECT a FROM t3 ORDER BY a DESC nULLS FIRST $limit
    " {{}   {}   30   20   10}
    
    do_execsql_test 1.$a.$tn.4 "
      SELECT a FROM t3 ORDER BY a DESC nULLS LAST $limit
    " {30   20   10   {}   {}}
  }

  switch $a {
    0 {
      execsql { CREATE INDEX i1 ON t3(a) }
    }
    1 {
      execsql { DROP INDEX i1 ; CREATE INDEX i1 ON t3(a DESC) }
    }
  }
}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 2.0 {
  CREATE TABLE t2(a, b, c);
  CREATE INDEX i2 ON t2(a, b);
  INSERT INTO t2 VALUES(1, 1, 1);
  INSERT INTO t2 VALUES(1, NULL, 2);
  INSERT INTO t2 VALUES(1, NULL, 3);
  INSERT INTO t2 VALUES(1, 4, 4);
}

do_execsql_test 2.1 {
  SELECT * FROM t2 WHERE a=1 ORDER BY b NULLS LAST
} {
  1 1 1    1 4 4   1 {} 2   1 {} 3
}

do_execsql_test 2.2 {
  SELECT * FROM t2 WHERE a=1 ORDER BY b DESC NULLS FIRST
} {
  1 {} 3
  1 {} 2     
  1 4 4     
  1 1 1
}

#-------------------------------------------------------------------------
#
reset_db
do_execsql_test 3.0 {
  CREATE TABLE t1(a, b, c, d, UNIQUE (b));
}
foreach {tn sql err}  {
  1 { CREATE INDEX i1 ON t1(a ASC NULLS LAST) }           LAST
  2 { CREATE INDEX i1 ON t1(a ASC NULLS FIRST) }          FIRST
  3 { CREATE INDEX i1 ON t1(a, b ASC NULLS LAST) }        LAST
  4 { CREATE INDEX i1 ON t1(a, b ASC NULLS FIRST) }       FIRST
  5 { CREATE INDEX i1 ON t1(a DESC NULLS LAST) }          LAST
  6 { CREATE INDEX i1 ON t1(a DESC NULLS FIRST) }         FIRST
  7 { CREATE INDEX i1 ON t1(a, b DESC NULLS LAST) }       LAST
  8 { CREATE INDEX i1 ON t1(a, b DESC NULLS FIRST) }      FIRST
  9  { CREATE TABLE t2(a, b, PRIMARY KEY(a DESC, b NULLS FIRST)) } FIRST
  10 { CREATE TABLE t2(a, b, UNIQUE(a DESC NULLS FIRST, b)) }      FIRST
  11 { INSERT INTO t1 VALUES(1, 2, 3, 4)
          ON CONFLICT (b DESC NULLS LAST) DO UPDATE SET a = a+1 } LAST
  12 {
    CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN
      INSERT INTO t1 VALUES(1, 2, 3, 4)
      ON CONFLICT (b DESC NULLS FIRST) DO UPDATE SET a = a+1;
    END
  } FIRST
} {
  do_catchsql_test 3.1.$tn $sql "1 {unsupported use of NULLS $err}"
}

do_execsql_test 3.2 {
  CREATE TABLE first(nulls, last);
  INSERT INTO first(last, nulls) VALUES(100,200), (300,400), (200,300);
  SELECT * FROM first ORDER BY nulls;
} {
  200 100
  300 200
  400 300
}

#-------------------------------------------------------------------------
#
ifcapable vtab {
  register_echo_module db
  do_execsql_test 4.0 {
    CREATE TABLE tx(a INTEGER PRIMARY KEY, b, c);
    CREATE INDEX i1 ON tx(b);
    INSERT INTO tx VALUES(1, 1, 1);
    INSERT INTO tx VALUES(2, NULL, 2);
    INSERT INTO tx VALUES(3, 3, 3);
    INSERT INTO tx VALUES(4, NULL, 4);
    INSERT INTO tx VALUES(5, 5, 5);
    CREATE VIRTUAL TABLE te USING echo(tx);
  }

  do_execsql_test 4.1 {
    SELECT * FROM tx ORDER BY b NULLS FIRST;
  } {2 {} 2  4 {} 4  1 1 1  3 3 3  5 5 5}
  do_execsql_test 4.2 {
    SELECT * FROM te ORDER BY b NULLS FIRST;
  } {2 {} 2  4 {} 4  1 1 1  3 3 3  5 5 5}

  do_execsql_test 4.3 {
    SELECT * FROM tx ORDER BY b NULLS LAST;
  } {1 1 1  3 3 3  5 5 5  2 {} 2  4 {} 4}
  do_execsql_test 4.4 {
    SELECT * FROM te ORDER BY b NULLS LAST;
  } {1 1 1  3 3 3  5 5 5  2 {} 2  4 {} 4}
}

#-------------------------------------------------------------------------
#
do_execsql_test 5.0 {
  CREATE TABLE t4(a, b, c);
  INSERT INTO t4 VALUES(1, 1, 11);
  INSERT INTO t4 VALUES(1, 2, 12);
  INSERT INTO t4 VALUES(1, NULL, 1);

  INSERT INTO t4 VALUES(2, NULL, 1);
  INSERT INTO t4 VALUES(2, 2, 12);
  INSERT INTO t4 VALUES(2, 1, 11);

  INSERT INTO t4 VALUES(3, NULL, 1);
  INSERT INTO t4 VALUES(3, 2, 12);
  INSERT INTO t4 VALUES(3, NULL, 3);
}

do_execsql_test 5.1 {
  SELECT * FROM t4 WHERE a IN (1, 2, 3) ORDER BY a, b NULLS LAST
} {
  1 1 11   1 2 12   1 {} 1   
  2 1 11   2 2 12   2 {} 1 
  3 2 12   3 {} 1   3 {} 3
}
do_execsql_test 5.2 {
  CREATE INDEX t4ab ON t4(a, b);
  SELECT * FROM t4 WHERE a IN (1, 2, 3) ORDER BY a, b NULLS LAST
} {
  1 1 11   1 2 12   1 {} 1   
  2 1 11   2 2 12   2 {} 1 
  3 2 12   3 {} 1   3 {} 3
}
do_eqp_test 5.3 {
  SELECT * FROM t4 WHERE a IN (1, 2, 3) ORDER BY a, b NULLS LAST
} {
  QUERY PLAN
  `--SEARCH TABLE t4 USING INDEX t4ab (a=?)
}

do_execsql_test 5.4 {
  SELECT * FROM t4 WHERE a IN (1, 2, 3) ORDER BY a DESC, b DESC NULLS FIRST
} {
  3 {} 3   3 {} 1   3 2 12   
  2 {} 1   2 2 12   2 1 11   
  1 {} 1   1 2 12   1 1 11   
}
do_eqp_test 5.5 {
  SELECT * FROM t4 WHERE a IN (1, 2, 3) ORDER BY a DESC, b DESC NULLS FIRST
} {
  QUERY PLAN
  `--SEARCH TABLE t4 USING INDEX t4ab (a=?)
}

#-------------------------------------------------------------------------
#
do_execsql_test 6.0 {
  CREATE TABLE t5(a, b, c);
  WITH s(i) AS (
    VALUES(1) UNION ALL SELECT i+1 FROM s WHERE i<200
  ) 
  INSERT INTO t5 SELECT i%2, CASE WHEN (i%10)==0 THEN NULL ELSE i END, i FROM s;
}

set res1 [db eval { SELECT a,b FROM t5 WHERE a=1 ORDER BY b NULLS LAST, c }]
set res2 [db eval { 
  SELECT a,b FROM t5 WHERE a=1 ORDER BY b DESC NULLS FIRST, c DESC 
}]

do_execsql_test 6.1.1 {
  CREATE INDEX t5ab ON t5(a, b, c);
  SELECT a,b FROM t5 WHERE a=1 ORDER BY b NULLS LAST, c;
} $res1
do_eqp_test 6.1.2 {
  SELECT a,b FROM t5 WHERE a=1 ORDER BY b NULLS LAST, c;
} {
  QUERY PLAN
  `--SEARCH TABLE t5 USING COVERING INDEX t5ab (a=?)
}
do_execsql_test 6.2.1 {
  SELECT a,b FROM t5 WHERE a=1 ORDER BY b DESC NULLS FIRST, c DESC 
} $res2
do_eqp_test 6.2.2 {
  SELECT a,b FROM t5 WHERE a=1 ORDER BY b DESC NULLS FIRST, c DESC 
} {
  QUERY PLAN
  `--SEARCH TABLE t5 USING COVERING INDEX t5ab (a=?)
}

#-------------------------------------------------------------------------
do_execsql_test 7.0 {
  CREATE TABLE t71(a, b, c);
  CREATE INDEX t71abc ON t71(a, b, c);

  SELECT * FROM t71 WHERE a=1 AND b=2 ORDER BY c NULLS LAST;
  SELECT * FROM t71 WHERE a=1 AND b=2 ORDER BY c DESC NULLS FIRST;

  SELECT * FROM t71 ORDER BY a NULLS LAST;
  SELECT * FROM t71 ORDER BY a DESC NULLS FIRST;
}

# 2019-12-18 gramfuzz1 find
# NULLS LAST not allows on an INTEGER PRIMARY KEY.
#
do_catchsql_test 8.0 {
  CREATE TABLE t80(a, b INTEGER, PRIMARY KEY(b NULLS LAST)) WITHOUT ROWID;
} {1 {unsupported use of NULLS LAST}}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 9.0 {
  CREATE TABLE v0 (c1, c2, c3);
  CREATE INDEX v3 ON v0 (c1, c2, c3);
}
do_execsql_test 9.1 {
  ANALYZE sqlite_master;
  INSERT INTO sqlite_stat1 VALUES('v0','v3','648 324 81');
  ANALYZE sqlite_master;
}

do_execsql_test 9.2 {
  INSERT INTO v0 VALUES
      (1, 10, 'b'),
      (1, 10, 'd'),
      (1, 10, NULL),
      (2, 10, 'a'),
      (2, 10, NULL),
      (1, 10, 'c'),
      (2, 10, 'b'),
      (1, 10, 'a'),
      (1, 10, NULL),
      (2, 10, NULL),
      (2, 10, 'd'),
      (2, 10, 'c');
}

do_execsql_test 9.3 {
  SELECT c1, c2, ifnull(c3, 'NULL') FROM v0 
  WHERE c2=10 ORDER BY c1, c3 NULLS LAST
} {
  1 10 a 1 10 b 1 10 c 1 10 d 1 10 NULL 1 10 NULL
  2 10 a 2 10 b 2 10 c 2 10 d 2 10 NULL 2 10 NULL
}

do_eqp_test 9.4 {
  SELECT c1, c2, ifnull(c3, 'NULL') FROM v0 
  WHERE c2=10 ORDER BY c1, c3 NULLS LAST
} {SEARCH TABLE v0 USING COVERING INDEX v3 (ANY(c1) AND c2=?)}


# 2020-03-01 ticket e12a0ae526bb51c7
# NULLS LAST on a LEFT JOIN
#
reset_db
do_execsql_test 10.10 {
  CREATE TABLE t1(x);
  INSERT INTO t1(x) VALUES('X');
  CREATE TABLE t2(c, d);
  CREATE INDEX t2dc ON t2(d, c);
  SELECT c FROM t1 LEFT JOIN t2 ON d=NULL ORDER BY d, c NULLS LAST;
} {{}}
do_execsql_test 10.20 {
  INSERT INTO t2(c,d) VALUES(5,'X'),(6,'Y'),(7,'Z'),(3,'A'),(4,'B');
  SELECT c FROM t1 LEFT JOIN t2 ON d=x ORDER BY d, c NULLS LAST;
} {5}
do_execsql_test 10.30 {
  UPDATE t2 SET d='X';
  UPDATE t2 SET c=NULL WHERE c=6;
  SELECT c FROM t1 LEFT JOIN t2 ON d=x ORDER BY d NULLS FIRST, c NULLS FIRST;
} {{} 3 4 5 7}
do_execsql_test 10.40 {
  SELECT c FROM t1 LEFT JOIN t2 ON d=x ORDER BY d NULLS LAST, c NULLS LAST;
} {3 4 5 7 {}}
do_execsql_test 10.41 {
  SELECT c FROM t1 LEFT JOIN t2 ON d=x ORDER BY c NULLS LAST;
} {3 4 5 7 {}}
do_execsql_test 10.42 {
  SELECT c FROM t1 LEFT JOIN t2 ON d=x ORDER BY +d NULLS LAST, +c NULLS LAST;
} {3 4 5 7 {}}
do_execsql_test 10.50 {
  INSERT INTO t1(x) VALUES(NULL),('Y');
  SELECT x, c, d, '|' FROM t1 LEFT JOIN t2 ON d=x
   ORDER BY d NULLS LAST, c NULLS LAST;
} {X 3 X | X 4 X | X 5 X | X 7 X | X {} X | {} {} {} | Y {} {} |}
do_execsql_test 10.51 {
  SELECT x, c, d, '|' FROM t1 LEFT JOIN t2 ON d=x
   ORDER BY +d NULLS LAST, +c NULLS LAST;
} {X 3 X | X 4 X | X 5 X | X 7 X | X {} X | {} {} {} | Y {} {} |}


finish_test