test/scanstatus.test

# 2014 November 1
#
# 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.
#
#***********************************************************************
#

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

ifcapable !scanstatus {
  finish_test
  return
}

do_execsql_test 1.0 {
  CREATE TABLE t1(a, b);
  CREATE TABLE t2(x, y);
  INSERT INTO t1 VALUES(1, 2);
  INSERT INTO t1 VALUES(3, 4);
  INSERT INTO t2 VALUES('a', 'b');
  INSERT INTO t2 VALUES('c', 'd');
  INSERT INTO t2 VALUES('e', 'f');
}

proc do_scanstatus_test {tn res} {
  set stmt [db version -last-stmt-ptr]
  set idx 0
  set ret [list]
  while {1} {
    set r [sqlite3_stmt_scanstatus $stmt $idx]
    if {[llength $r]==0} break
    foreach v {nLoop nVisit nEst zName zExplain} {
      lappend ret $v [dict get $r $v]
    }
    incr idx
  }

  uplevel [list do_test $tn [list set {} $ret] [list {*}$res]]
}

do_execsql_test 1.1 { SELECT count(*) FROM t1, t2; } 6
do_scanstatus_test 1.2 {
  nLoop 1 nVisit 2 nEst 1048576.0 zName t1 zExplain {SCAN t1}
  nLoop 2 nVisit 6 nEst 1048576.0 zName t2 zExplain {SCAN t2}
}

do_execsql_test 1.3 {
  ANALYZE;
  SELECT count(*) FROM t1, t2;
} 6
do_scanstatus_test 1.4 {
  nLoop 1 nVisit 2 nEst 2.0 zName t1 zExplain {SCAN t1}
  nLoop 2 nVisit 6 nEst 3.0 zName t2 zExplain {SCAN t2}
}

do_execsql_test 1.5 { ANALYZE }
do_execsql_test 1.6 {
  SELECT count(*) FROM t1, t2 WHERE t2.rowid>1;
} 4
do_scanstatus_test 1.7 {
  nLoop 1 nVisit 2 nEst 2.0 zName t2 zExplain 
  {SEARCH t2 USING INTEGER PRIMARY KEY (rowid>?)}
  nLoop 2 nVisit 4 nEst 2.0 zName t1 zExplain {SCAN t1}
}

do_execsql_test 1.8 {
  SELECT count(*) FROM t1, t2 WHERE t2.rowid>1;
} 4

do_scanstatus_test 1.9 {
  nLoop 2 nVisit 4 nEst 2.0 zName t2 zExplain 
  {SEARCH t2 USING INTEGER PRIMARY KEY (rowid>?)}
  nLoop 4 nVisit 8 nEst 2.0 zName t1 zExplain {SCAN t1}
}

do_test 1.9 {
  sqlite3_stmt_scanstatus_reset [db version -last-stmt-ptr]
} {}

do_scanstatus_test 1.10 {
  nLoop 0 nVisit 0 nEst 2.0 zName t2 zExplain 
  {SEARCH t2 USING INTEGER PRIMARY KEY (rowid>?)}
  nLoop 0 nVisit 0 nEst 2.0 zName t1 zExplain {SCAN t1}
}

#-------------------------------------------------------------------------
# Try a few different types of scans.
#
reset_db
do_execsql_test 2.1 {
  CREATE TABLE x1(i INTEGER PRIMARY KEY, j);
  INSERT INTO x1 VALUES(1, 'one');
  INSERT INTO x1 VALUES(2, 'two');
  INSERT INTO x1 VALUES(3, 'three');
  INSERT INTO x1 VALUES(4, 'four');
  CREATE INDEX x1j ON x1(j);

  SELECT * FROM x1 WHERE i=2;
} {2 two}

do_scanstatus_test 2.2 {
  nLoop 1 nVisit 1 nEst 1.0 zName x1 
  zExplain {SEARCH x1 USING INTEGER PRIMARY KEY (rowid=?)}
}

do_execsql_test 2.3.1 {
  SELECT * FROM x1 WHERE j='two'
} {2 two}
do_scanstatus_test 2.3.2 {
  nLoop 1 nVisit 1 nEst 10.0 zName x1j 
  zExplain {SEARCH x1 USING COVERING INDEX x1j (j=?)}
}

do_execsql_test 2.4.1 {
  SELECT * FROM x1 WHERE j<'two'
} {4 four 1 one 3 three}
do_scanstatus_test 2.4.2 {
  nLoop 1 nVisit 3 nEst 262144.0 zName x1j 
  zExplain {SEARCH x1 USING COVERING INDEX x1j (j<?)}
}

do_execsql_test 2.5.1 {
  SELECT * FROM x1 WHERE j>='two'
} {2 two}
do_scanstatus_test 2.5.2 {
  nLoop 1 nVisit 1 nEst 262144.0 zName x1j 
  zExplain {SEARCH x1 USING COVERING INDEX x1j (j>?)}
}

do_execsql_test 2.6.1 {
  SELECT * FROM x1 WHERE j BETWEEN 'three' AND 'two'
} {3 three 2 two}
do_scanstatus_test 2.6.2 {
  nLoop 1 nVisit 2 nEst 16384.0 zName x1j 
  zExplain {SEARCH x1 USING COVERING INDEX x1j (j>? AND j<?)}
}

do_execsql_test 2.7.1 {
  CREATE TABLE x2(i INTEGER, j, k);
  INSERT INTO x2 SELECT i, j, i || ' ' || j FROM x1;
  CREATE INDEX x2j ON x2(j);
  CREATE INDEX x2ij ON x2(i, j);
  SELECT * FROM x2 WHERE j BETWEEN 'three' AND 'two'
} {3 three {3 three} 2 two {2 two}}

do_scanstatus_test 2.7.2 {
  nLoop 1 nVisit 2 nEst 16384.0 zName x2j 
  zExplain {SEARCH x2 USING INDEX x2j (j>? AND j<?)}
}

do_execsql_test 2.8.1 {
  SELECT * FROM x2 WHERE i=1 AND j='two'
}
do_scanstatus_test 2.8.2 {
  nLoop 1 nVisit 0 nEst 8.0 zName x2ij 
  zExplain {SEARCH x2 USING INDEX x2ij (i=? AND j=?)}
}

do_execsql_test 2.9.1 {
  SELECT * FROM x2 WHERE i=5 AND j='two'
}
do_scanstatus_test 2.9.2 {
  nLoop 1 nVisit 0 nEst 8.0 zName x2ij 
  zExplain {SEARCH x2 USING INDEX x2ij (i=? AND j=?)}
}

do_execsql_test 2.10.1 {
  SELECT * FROM x2 WHERE i=3 AND j='three'
} {3 three {3 three}}
do_scanstatus_test 2.10.2 {
  nLoop 1 nVisit 1 nEst 8.0 zName x2ij 
  zExplain {SEARCH x2 USING INDEX x2ij (i=? AND j=?)}
}

#-------------------------------------------------------------------------
# Try with queries that use the OR optimization.
#
do_execsql_test 3.1 {
  CREATE TABLE a1(a, b, c, d);
  CREATE INDEX a1a ON a1(a);
  CREATE INDEX a1bc ON a1(b, c);

  WITH d(x) AS (SELECT 1 UNION ALL SELECT x+1 AS n FROM d WHERE n<=100)
  INSERT INTO a1 SELECT x, x, x, x FROM d;
}

do_execsql_test 3.2.1 {
  SELECT d FROM a1 WHERE (a=4 OR b=13)
} {4 13}
do_scanstatus_test 3.2.2 {
  nLoop 1 nVisit 1 nEst 10.0 zName a1a 
  zExplain {SEARCH a1 USING INDEX a1a (a=?)}
  nLoop 1 nVisit 1 nEst 10.0 zName a1bc 
  zExplain {SEARCH a1 USING INDEX a1bc (b=?)}
}

do_execsql_test 3.2.1 {
  SELECT count(*) FROM a1 WHERE (a BETWEEN 4 AND 12) OR (b BETWEEN 40 AND 60)
} {30}
do_scanstatus_test 3.2.2 {
  nLoop 1 nVisit 9 nEst 16384.0 zName a1a 
  zExplain {SEARCH a1 USING INDEX a1a (a>? AND a<?)}
  nLoop 1 nVisit 21 nEst 16384.0 zName a1bc
  zExplain {SEARCH a1 USING INDEX a1bc (b>? AND b<?)}
}

do_execsql_test 3.3.1 {
  SELECT count(*) FROM a1 AS x, a1 AS y 
  WHERE (x.a BETWEEN 4 AND 12) AND (y.b BETWEEN 1 AND 10)
} {90}
do_scanstatus_test 3.2.2 {
  nLoop 1 nVisit 10 nEst 16384.0 zName a1bc 
  zExplain {SEARCH y USING COVERING INDEX a1bc (b>? AND b<?)}
  nLoop 10 nVisit 90 nEst 16384.0 zName a1a
  zExplain {SEARCH x USING COVERING INDEX a1a (a>? AND a<?)}
}

do_execsql_test 3.4.1 {
  SELECT count(*) FROM a1 WHERE a IN (1, 5, 10, 15);
} {4}
do_scanstatus_test 3.4.2 {
  nLoop 1 nVisit 4 nEst 40.0 zName a1a 
  zExplain {SEARCH a1 USING COVERING INDEX a1a (a=?)}
}

do_execsql_test 3.4.1 {
  SELECT count(*) FROM a1 WHERE rowid IN (1, 5, 10, 15);
} {4}
do_scanstatus_test 3.4.2 {
  nLoop 1 nVisit 4 nEst 4.0 zName a1
  zExplain {SEARCH a1 USING INTEGER PRIMARY KEY (rowid=?)}
}

#-------------------------------------------------------------------------
# Test that scanstatus() data is not available for searches performed
# by triggers.
#
# It is available for searches performed as part of FK processing, but 
# not FK action processing.
#
do_execsql_test 4.0 {
  CREATE TABLE t1(a, b, c);
  CREATE TABLE t2(x PRIMARY KEY, y, z);
  CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN
    SELECT * FROM t2 WHERE x BETWEEN 20 AND 40;
  END;
  WITH d(x) AS (SELECT 1 UNION ALL SELECT x+1 AS n FROM d WHERE n<=100)
  INSERT INTO t2 SELECT x, x*2, x*3 FROM d;
}

do_execsql_test    4.1.1 { INSERT INTO t1 VALUES(1, 2, 3); }
do_scanstatus_test 4.1.2 {}

do_execsql_test 4.2 {
  CREATE TABLE p1(x PRIMARY KEY);
  INSERT INTO p1 VALUES(1), (2), (3), (4);
  CREATE TABLE c1(y REFERENCES p1);
  INSERT INTO c1 VALUES(1), (2), (3);
  PRAGMA foreign_keys=on;
}
do_execsql_test    4.2.1 { DELETE FROM p1 WHERE x=4 }
do_scanstatus_test 4.2.2 { 
  nLoop 1 nVisit 1 nEst 1.0 zName sqlite_autoindex_p1_1 
  zExplain {SEARCH p1 USING INDEX sqlite_autoindex_p1_1 (x=?)}

  nLoop 1 nVisit 3 nEst 262144.0 zName c1 zExplain {SCAN c1}
}

#-------------------------------------------------------------------------
# Further tests of different scan types.
#
reset_db
proc tochar {i} {
  set alphabet {a b c d e f g h i j k l m n o p q r s t u v w x y z}
  return [lindex $alphabet [expr $i % [llength $alphabet]]]
}
db func tochar tochar
do_execsql_test 5.0 {
  CREATE TABLE t1(a PRIMARY KEY, b, c);
  INSERT INTO t1 VALUES(0, 1, 'a');
  INSERT INTO t1 VALUES(1, 0, 'b');
  INSERT INTO t1 VALUES(2, 1, 'c');
  INSERT INTO t1 VALUES(3, 0, 'd');
  INSERT INTO t1 VALUES(4, 1, 'e');
  INSERT INTO t1 VALUES(5, 0, 'a');
  INSERT INTO t1 VALUES(6, 1, 'b');
  INSERT INTO t1 VALUES(7, 0, 'c');
  INSERT INTO t1 VALUES(8, 1, 'd');
  INSERT INTO t1 VALUES(9, 0, 'e');
  CREATE INDEX t1bc ON t1(b, c);

  CREATE TABLE t2(x, y);
  CREATE INDEX t2xy ON t2(x, y);
  WITH data(i, x, y) AS (
    SELECT 0, 0, tochar(0) 
    UNION ALL
    SELECT i+1, (i+1)%2, tochar(i+1) FROM data WHERE i<500
  ) INSERT INTO t2 SELECT x, y FROM data;

  CREATE TABLE t3(x, y);
  INSERT INTO t3 SELECT * FROM t2;

  ANALYZE;
}

do_execsql_test 5.1.1 {
  SELECT count(*) FROM t1 WHERE a IN (SELECT b FROM t1 AS ii)
} {2}
do_scanstatus_test 5.1.2 { 
  nLoop 1 nVisit 10 nEst 10.0 zName t1
  zExplain {SCAN ii}
  nLoop 1 nVisit 2 nEst 8.0 zName sqlite_autoindex_t1_1
  zExplain {SEARCH t1 USING COVERING INDEX sqlite_autoindex_t1_1 (a=?)}
}

do_execsql_test 5.2.1 {
  SELECT count(*) FROM t1 WHERE a IN (0, 1)
} {2}
do_scanstatus_test 5.2.2 { 
  nLoop 1 nVisit 2 nEst 2.0 zName sqlite_autoindex_t1_1
  zExplain {SEARCH t1 USING COVERING INDEX sqlite_autoindex_t1_1 (a=?)}
}

do_eqp_test 5.3.1 {
  SELECT count(*) FROM t2 WHERE y = 'j';
} {SEARCH t2 USING COVERING INDEX t2xy (ANY(x) AND y=?)}
do_execsql_test 5.3.2 {
  SELECT count(*) FROM t2 WHERE y = 'j';
} {19}
do_scanstatus_test 5.3.3 { 
  nLoop 1 nVisit 19 nEst 56.0 zName t2xy zExplain
  {SEARCH t2 USING COVERING INDEX t2xy (ANY(x) AND y=?)}
}

do_eqp_test 5.4.1 {
  SELECT count(*) FROM t1, t2 WHERE y = c;
} {
  QUERY PLAN
  |--SCAN t1
  `--SEARCH t2 USING COVERING INDEX t2xy (ANY(x) AND y=?)
}
do_execsql_test 5.4.2 {
  SELECT count(*) FROM t1, t2 WHERE y = c;
} {200}
do_scanstatus_test 5.4.3 { 
  nLoop 1 nVisit 10 nEst 10.0 zName t1
  zExplain {SCAN t1}
  nLoop 10 nVisit 200 nEst 56.0 zName t2xy 
  zExplain {SEARCH t2 USING COVERING INDEX t2xy (ANY(x) AND y=?)}
}

do_eqp_test 5.5.1 {
  SELECT count(*) FROM t1, t3 WHERE y = c;
} {
  QUERY PLAN
  |--SCAN t3
  `--SEARCH t1 USING AUTOMATIC COVERING INDEX (c=?)
}
do_execsql_test 5.5.2 {
  SELECT count(*) FROM t1, t3 WHERE y = c;
} {200}
do_scanstatus_test 5.5.3 { 
  nLoop 1 nVisit 501 nEst 480.0 zName t3 zExplain {SCAN t3}
  nLoop 501 nVisit 200 nEst 20.0 zName auto-index zExplain
  {SEARCH t1 USING AUTOMATIC COVERING INDEX (c=?)}
}

#-------------------------------------------------------------------------
# Virtual table scans
#
ifcapable fts3 {
  do_execsql_test 6.0 {
    CREATE VIRTUAL TABLE ft1 USING fts4;
    INSERT INTO ft1 VALUES('a d c f g h e i f c');
    INSERT INTO ft1 VALUES('g c h b g b f f f g');
    INSERT INTO ft1 VALUES('h h c c h f a e d d');
    INSERT INTO ft1 VALUES('e j i j i e b c f g');
    INSERT INTO ft1 VALUES('g f b g j c h a d f');
    INSERT INTO ft1 VALUES('j i a e g f a i a c');
    INSERT INTO ft1 VALUES('f d g g j j c a h g');
    INSERT INTO ft1 VALUES('b d h a d j j j b i');
    INSERT INTO ft1 VALUES('j e a b j e c b c i');
    INSERT INTO ft1 VALUES('a d e f b j j c g d');
  }
  do_execsql_test 6.1.1 {
    SELECT count(*) FROM ft1 WHERE ft1 MATCH 'd'
  } {6}
  do_scanstatus_test 6.1.2 { 
    nLoop 1 nVisit 6 nEst 24.0 zName ft1 zExplain 
    {SCAN ft1 VIRTUAL TABLE INDEX 3:}
  }
}


finish_test