sqlite/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

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_last_stmt_ptr db]
  set idx 0
  set ret [list]
  while {1} {
    set r [sqlite3_stmt_scanstatus $stmt $idx]
    if {[llength $r]==0} break
    lappend ret {*}$r
    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 zName t1 zExplain {SCAN TABLE t1}
  nLoop 2 nVisit 6 nEst 1048576 zName t2 zExplain {SCAN TABLE t2}
}

do_execsql_test 1.3 {
  ANALYZE;
  SELECT count(*) FROM t1, t2;
} 6
do_scanstatus_test 1.4 {
  nLoop 1 nVisit 2 nEst 2 zName t1 zExplain {SCAN TABLE t1}
  nLoop 2 nVisit 6 nEst 3 zName t2 zExplain {SCAN TABLE 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 zName t2 zExplain 
  {SEARCH TABLE t2 USING INTEGER PRIMARY KEY (rowid>?)}
  nLoop 2 nVisit 4 nEst 2 zName t1 zExplain {SCAN TABLE 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 zName t2 zExplain 
  {SEARCH TABLE t2 USING INTEGER PRIMARY KEY (rowid>?)}
  nLoop 4 nVisit 8 nEst 2 zName t1 zExplain {SCAN TABLE t1}
}

do_test 1.9 {
  sqlite3_stmt_scanstatus_reset [db_last_stmt_ptr db]
} {}

do_scanstatus_test 1.10 {
  nLoop 0 nVisit 0 nEst 2 zName t2 zExplain 
  {SEARCH TABLE t2 USING INTEGER PRIMARY KEY (rowid>?)}
  nLoop 0 nVisit 0 nEst 2 zName t1 zExplain {SCAN TABLE 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 zName x1 
  zExplain {SEARCH TABLE 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 zName x1j 
  zExplain {SEARCH TABLE 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 4 nEst 262144 zName x1j 
  zExplain {SEARCH TABLE 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 zName x1j 
  zExplain {SEARCH TABLE 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 zName x1j 
  zExplain {SEARCH TABLE 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 zName x2j 
  zExplain {SEARCH TABLE 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 1 nEst 8 zName x2ij 
  zExplain {SEARCH TABLE 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 zName x2ij 
  zExplain {SEARCH TABLE 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 2 nEst 8 zName x2ij 
  zExplain {SEARCH TABLE 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 2.4 {
  nLoop 1 nVisit 2 nEst 10 zName a1a 
  zExplain {SEARCH TABLE a1 USING INDEX a1a (a=?)}

  nLoop 1 nVisit 2 nEst 10 zName a1bc 
  zExplain {SEARCH TABLE a1 USING INDEX a1bc (b=?)}
}



finish_test