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Artifact e446f55417f434929522d87164cd1473d54f10e2:


# 2005 July 28
#
# 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.  The
# focus of this file is testing the use of indices in WHERE clauses
# based on recent changes to the optimizer.
#
# $Id: where2.test,v 1.14 2008/10/07 23:46:39 drh Exp $

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

# Build some test data
#
do_test where2-1.0 {
  execsql {
    BEGIN;
    CREATE TABLE t1(w int, x int, y int, z int);
  }
  for {set i 1} {$i<=100} {incr i} {
    set w $i
    set x [expr {int(log($i)/log(2))}]
    set y [expr {$i*$i + 2*$i + 1}]
    set z [expr {$x+$y}]
    ifcapable tclvar {
      execsql {INSERT INTO t1 VALUES($::w,$::x,$::y,$::z)}
    } else {
      execsql {INSERT INTO t1 VALUES(:w,:x,:y,:z)}
    }
  }
  execsql {
    CREATE UNIQUE INDEX i1w ON t1(w);
    CREATE INDEX i1xy ON t1(x,y);
    CREATE INDEX i1zyx ON t1(z,y,x);
    COMMIT;
  }
} {}

# Do an SQL statement.  Append the search count to the end of the result.
#
proc count sql {
  set ::sqlite_search_count 0
  return [concat [execsql $sql] $::sqlite_search_count]
}

# This procedure executes the SQL.  Then it checks to see if the OP_Sort
# opcode was executed.  If an OP_Sort did occur, then "sort" is appended
# to the result.  If no OP_Sort happened, then "nosort" is appended.
#
# This procedure is used to check to make sure sorting is or is not
# occurring as expected.
#
proc cksort {sql} {
  set data [execsql $sql]
  if {[db status sort]} {set x sort} {set x nosort}
  lappend data $x
  return $data
}

# This procedure executes the SQL.  Then it appends to the result the
# "sort" or "nosort" keyword (as in the cksort procedure above) then
# it appends the ::sqlite_query_plan variable.
#
proc queryplan {sql} {
  set ::sqlite_sort_count 0
  set data [execsql $sql]
  if {$::sqlite_sort_count} {set x sort} {set x nosort}
  lappend data $x
  return [concat $data $::sqlite_query_plan]
}


# Prefer a UNIQUE index over another index.
#
do_test where2-1.1 {
  queryplan {
    SELECT * FROM t1 WHERE w=85 AND x=6 AND y=7396
  }
} {85 6 7396 7402 nosort t1 i1w}

# Always prefer a rowid== constraint over any other index.
#
do_test where2-1.3 {
  queryplan {
    SELECT * FROM t1 WHERE w=85 AND x=6 AND y=7396 AND rowid=85
  }
} {85 6 7396 7402 nosort t1 *}

# When constrained by a UNIQUE index, the ORDER BY clause is always ignored.
#
do_test where2-2.1 {
  queryplan {
    SELECT * FROM t1 WHERE w=85 ORDER BY random(5);
  }
} {85 6 7396 7402 nosort t1 i1w}
do_test where2-2.2 {
  queryplan {
    SELECT * FROM t1 WHERE x=6 AND y=7396 ORDER BY random(5);
  }
} {85 6 7396 7402 sort t1 i1xy}
do_test where2-2.3 {
  queryplan {
    SELECT * FROM t1 WHERE rowid=85 AND x=6 AND y=7396 ORDER BY random(5);
  }
} {85 6 7396 7402 nosort t1 *}


# Efficient handling of forward and reverse table scans.
#
do_test where2-3.1 {
  queryplan {
    SELECT * FROM t1 ORDER BY rowid LIMIT 2
  }
} {1 0 4 4 2 1 9 10 nosort t1 *}
do_test where2-3.2 {
  queryplan {
    SELECT * FROM t1 ORDER BY rowid DESC LIMIT 2
  }
} {100 6 10201 10207 99 6 10000 10006 nosort t1 *}

# The IN operator can be used by indices at multiple layers
#
ifcapable subquery {
  do_test where2-4.1 {
    queryplan {
      SELECT * FROM t1 WHERE z IN (10207,10006) AND y IN (10000,10201)
                       AND x>0 AND x<10
      ORDER BY w
    }
  } {99 6 10000 10006 100 6 10201 10207 sort t1 i1zyx}
  do_test where2-4.2 {
    queryplan {
      SELECT * FROM t1 WHERE z IN (10207,10006) AND y=10000
                       AND x>0 AND x<10
      ORDER BY w
    }
  } {99 6 10000 10006 sort t1 i1zyx}
  do_test where2-4.3 {
    queryplan {
      SELECT * FROM t1 WHERE z=10006 AND y IN (10000,10201)
                       AND x>0 AND x<10
      ORDER BY w
    }
  } {99 6 10000 10006 sort t1 i1zyx}
  ifcapable compound {
    do_test where2-4.4 {
      queryplan {
        SELECT * FROM t1 WHERE z IN (SELECT 10207 UNION SELECT 10006)
                         AND y IN (10000,10201)
                         AND x>0 AND x<10
        ORDER BY w
      }
    } {99 6 10000 10006 100 6 10201 10207 sort t1 i1zyx}
    do_test where2-4.5 {
      queryplan {
        SELECT * FROM t1 WHERE z IN (SELECT 10207 UNION SELECT 10006)
                         AND y IN (SELECT 10000 UNION SELECT 10201)
                         AND x>0 AND x<10
        ORDER BY w
      }
    } {99 6 10000 10006 100 6 10201 10207 sort t1 i1zyx}
  }
  do_test where2-4.6 {
    queryplan {
      SELECT * FROM t1
       WHERE x IN (1,2,3,4,5,6,7,8)
         AND y IN (10000,10001,10002,10003,10004,10005)
       ORDER BY 2
    }
  } {99 6 10000 10006 sort t1 i1xy}

  # Duplicate entires on the RHS of an IN operator do not cause duplicate
  # output rows.
  #
  do_test where2-4.6 {
    queryplan {
      SELECT * FROM t1 WHERE z IN (10207,10006,10006,10207)
      ORDER BY w
    }
  } {99 6 10000 10006 100 6 10201 10207 sort t1 i1zyx}
  ifcapable compound {
    do_test where2-4.7 {
      queryplan {
        SELECT * FROM t1 WHERE z IN (
           SELECT 10207 UNION ALL SELECT 10006
           UNION ALL SELECT 10006 UNION ALL SELECT 10207)
        ORDER BY w
      }
    } {99 6 10000 10006 100 6 10201 10207 sort t1 i1zyx}
  }

} ;# ifcapable subquery

# The use of an IN operator disables the index as a sorter.
#
do_test where2-5.1 {
  queryplan {
    SELECT * FROM t1 WHERE w=99 ORDER BY w
  }
} {99 6 10000 10006 nosort t1 i1w}

ifcapable subquery {
  do_test where2-5.2 {
    queryplan {
      SELECT * FROM t1 WHERE w IN (99) ORDER BY w
    }
  } {99 6 10000 10006 sort t1 i1w}
}

# Verify that OR clauses get translated into IN operators.
#
set ::idx {}
ifcapable subquery {set ::idx i1w}
do_test where2-6.1.1 {
  queryplan {
    SELECT * FROM t1 WHERE w=99 OR w=100 ORDER BY +w
  }
} [list 99 6 10000 10006 100 6 10201 10207 sort t1 $::idx]
do_test where2-6.1.2 {
  queryplan {
    SELECT * FROM t1 WHERE 99=w OR 100=w ORDER BY +w
  }
} [list 99 6 10000 10006 100 6 10201 10207 sort t1 $::idx]
do_test where2-6.2 {
  queryplan {
    SELECT * FROM t1 WHERE w=99 OR w=100 OR 6=w ORDER BY +w
  }
} [list 6 2 49 51 99 6 10000 10006 100 6 10201 10207 sort t1 $::idx]

do_test where2-6.3 {
  queryplan {
    SELECT * FROM t1 WHERE w=99 OR w=100 OR 6=+w ORDER BY +w
  }
} {6 2 49 51 99 6 10000 10006 100 6 10201 10207 sort t1 {}}
do_test where2-6.4 {
  queryplan {
    SELECT * FROM t1 WHERE w=99 OR +w=100 OR 6=w ORDER BY +w
  }
} {6 2 49 51 99 6 10000 10006 100 6 10201 10207 sort t1 {}}

set ::idx {}
ifcapable subquery {set ::idx i1zyx}
do_test where2-6.5 {
  queryplan {
    SELECT b.* FROM t1 a, t1 b
     WHERE a.w=1 AND (a.y=b.z OR b.z=10)
     ORDER BY +b.w
  }
} [list 1 0 4 4 2 1 9 10 sort a i1w b $::idx]
do_test where2-6.6 {
  queryplan {
    SELECT b.* FROM t1 a, t1 b
     WHERE a.w=1 AND (b.z=10 OR a.y=b.z OR b.z=10)
     ORDER BY +b.w
  }
} [list 1 0 4 4 2 1 9 10 sort a i1w b $::idx]

# Ticket #2249.  Make sure the OR optimization is not attempted if
# comparisons between columns of different affinities are needed.
#
do_test where2-6.7 {
  execsql {
    CREATE TABLE t2249a(a TEXT UNIQUE);
    CREATE TABLE t2249b(b INTEGER);
    INSERT INTO t2249a VALUES('0123');
    INSERT INTO t2249b VALUES(123);
  }
  queryplan {
    -- Because a is type TEXT and b is type INTEGER, both a and b
    -- will attempt to convert to NUMERIC before the comparison.
    -- They will thus compare equal.
    --
    SELECT * FROM t2249b CROSS JOIN t2249a WHERE a=b;
  }
} {123 0123 nosort t2249b {} t2249a {}}
do_test where2-6.9 {
  queryplan {
    -- The + operator removes affinity from the rhs.  No conversions
    -- occur and the comparison is false.  The result is an empty set.
    --
    SELECT * FROM t2249b CROSS JOIN t2249a WHERE a=+b;
  }
} {nosort t2249b {} {} sqlite_autoindex_t2249a_1}
do_test where2-6.9.2 {
  # The same thing but with the expression flipped around.
  queryplan {
    SELECT * FROM t2249b CROSS JOIN t2249a WHERE +b=a
  }
} {nosort t2249b {} {} sqlite_autoindex_t2249a_1}
do_test where2-6.10 {
  queryplan {
    -- Use + on both sides of the comparison to disable indices
    -- completely.  Make sure we get the same result.
    --
    SELECT * FROM t2249b CROSS JOIN t2249a WHERE +a=+b;
  }
} {nosort t2249b {} t2249a {}}
do_test where2-6.11 {
  # This will not attempt the OR optimization because of the a=b
  # comparison.
  queryplan {
    SELECT * FROM t2249b CROSS JOIN t2249a WHERE a=b OR a='hello';
  }
} {123 0123 nosort t2249b {} t2249a {}}
do_test where2-6.11.2 {
  # Permutations of the expression terms.
  queryplan {
    SELECT * FROM t2249b CROSS JOIN t2249a WHERE b=a OR a='hello';
  }
} {123 0123 nosort t2249b {} t2249a {}}
do_test where2-6.11.3 {
  # Permutations of the expression terms.
  queryplan {
    SELECT * FROM t2249b CROSS JOIN t2249a WHERE 'hello'=a OR b=a;
  }
} {123 0123 nosort t2249b {} t2249a {}}
do_test where2-6.11.4 {
  # Permutations of the expression terms.
  queryplan {
    SELECT * FROM t2249b CROSS JOIN t2249a WHERE a='hello' OR b=a;
  }
} {123 0123 nosort t2249b {} t2249a {}}
ifcapable explain&&subquery {
  # These tests are not run if subquery support is not included in the
  # build. This is because these tests test the "a = 1 OR a = 2" to
  # "a IN (1, 2)" optimisation transformation, which is not enabled if
  # subqueries and the IN operator is not available.
  #
  do_test where2-6.12 {
    # In this case, the +b disables the affinity conflict and allows
    # the OR optimization to be used again.  The result is now an empty
    # set, the same as in where2-6.9.
    queryplan {
      SELECT * FROM t2249b CROSS JOIN t2249a WHERE a=+b OR a='hello';
    }
  } {nosort t2249b {} {} sqlite_autoindex_t2249a_1}
  do_test where2-6.12.2 {
    # In this case, the +b disables the affinity conflict and allows
    # the OR optimization to be used again.  The result is now an empty
    # set, the same as in where2-6.9.
    queryplan {
      SELECT * FROM t2249b CROSS JOIN t2249a WHERE a='hello' OR +b=a;
    }
  } {nosort t2249b {} {} sqlite_autoindex_t2249a_1}
  do_test where2-6.12.3 {
    # In this case, the +b disables the affinity conflict and allows
    # the OR optimization to be used again.  The result is now an empty
    # set, the same as in where2-6.9.
    queryplan {
      SELECT * FROM t2249b CROSS JOIN t2249a WHERE +b=a OR a='hello';
    }
  } {nosort t2249b {} {} sqlite_autoindex_t2249a_1}
  do_test where2-6.13 {
    # The addition of +a on the second term disabled the OR optimization.
    # But we should still get the same empty-set result as in where2-6.9.
    queryplan {
      SELECT * FROM t2249b CROSS JOIN t2249a WHERE a=+b OR +a='hello';
    }
  } {nosort t2249b {} t2249a {}}
}

# Variations on the order of terms in a WHERE clause in order
# to make sure the OR optimizer can recognize them all.
do_test where2-6.20 {
  queryplan {
    SELECT * FROM t2249a x CROSS JOIN t2249a y WHERE x.a=y.a
  }
} {0123 0123 nosort x {} {} sqlite_autoindex_t2249a_1}
ifcapable explain&&subquery {
  # These tests are not run if subquery support is not included in the
  # build. This is because these tests test the "a = 1 OR a = 2" to
  # "a IN (1, 2)" optimisation transformation, which is not enabled if
  # subqueries and the IN operator is not available.
  #
  do_test where2-6.21 {
    queryplan {
      SELECT * FROM t2249a x CROSS JOIN t2249a y WHERE x.a=y.a OR y.a='hello'
    }
  } {0123 0123 nosort x {} {} sqlite_autoindex_t2249a_1}
  do_test where2-6.22 {
    queryplan {
      SELECT * FROM t2249a x CROSS JOIN t2249a y WHERE y.a=x.a OR y.a='hello'
    }
  } {0123 0123 nosort x {} {} sqlite_autoindex_t2249a_1}
  do_test where2-6.23 {
    queryplan {
      SELECT * FROM t2249a x CROSS JOIN t2249a y WHERE y.a='hello' OR x.a=y.a
    }
  } {0123 0123 nosort x {} {} sqlite_autoindex_t2249a_1}
}

# Unique queries (queries that are guaranteed to return only a single
# row of result) do not call the sorter.  But all tables must give
# a unique result.  If any one table in the join does not give a unique
# result then sorting is necessary.
#
do_test where2-7.1 {
  cksort {
    create table t8(a unique, b, c);
    insert into t8 values(1,2,3);
    insert into t8 values(2,3,4);
    create table t9(x,y);
    insert into t9 values(2,4);
    insert into t9 values(2,3);
    select y from t8, t9 where a=1 order by a, y;
  }
} {3 4 sort}
do_test where2-7.2 {
  cksort {
    select * from t8 where a=1 order by b, c
  }
} {1 2 3 nosort}
do_test where2-7.3 {
  cksort {
    select * from t8, t9 where a=1 and y=3 order by b, x
  }
} {1 2 3 2 3 sort}
do_test where2-7.4 {
  cksort {
    create unique index i9y on t9(y);
    select * from t8, t9 where a=1 and y=3 order by b, x
  }
} {1 2 3 2 3 nosort}

# Ticket #1807.  Using IN constrains on multiple columns of
# a multi-column index.
#
ifcapable subquery {
  do_test where2-8.1 {
    execsql {
      SELECT * FROM t1 WHERE x IN (20,21) AND y IN (1,2)
    }
  } {}
  do_test where2-8.2 {
    execsql {
      SELECT * FROM t1 WHERE x IN (1,2) AND y IN (-5,-6)
    }
  } {}
  execsql {CREATE TABLE tx AS SELECT * FROM t1}
  do_test where2-8.3 {
    execsql {
      SELECT w FROM t1
       WHERE x IN (SELECT x FROM tx WHERE rowid<0)
         AND +y IN (SELECT y FROM tx WHERE rowid=1)
    }
  } {}
  do_test where2-8.4 {
    execsql {
      SELECT w FROM t1
       WHERE x IN (SELECT x FROM tx WHERE rowid=1)
         AND y IN (SELECT y FROM tx WHERE rowid<0)
    }
  } {}
  #set sqlite_where_trace 1
  do_test where2-8.5 {
    execsql {
      CREATE INDEX tx_xyz ON tx(x, y, z, w);
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN 12 AND 14)
    }
  } {12 13 14}
  do_test where2-8.6 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN 12 AND 14)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
    }
  } {12 13 14}
  do_test where2-8.7 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 12 AND 14)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
    }
  } {10 11 12 13 14 15}
  do_test where2-8.8 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
    }
  } {10 11 12 13 14 15 16 17 18 19 20}
  do_test where2-8.9 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN 2 AND 4)
    }
  } {}
  do_test where2-8.10 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN 2 AND 4)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
    }
  } {}
  do_test where2-8.11 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 2 AND 4)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
    }
  } {}
  do_test where2-8.12 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN -4 AND -2)
    }
  } {}
  do_test where2-8.13 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN -4 AND -2)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
    }
  } {}
  do_test where2-8.14 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN -4 AND -2)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
    }
  } {}
  do_test where2-8.15 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN 200 AND 300)
    }
  } {}
  do_test where2-8.16 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 10 AND 20)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN 200 AND 300)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
    }
  } {}
  do_test where2-8.17 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE w BETWEEN 200 AND 300)
         AND y IN (SELECT y FROM t1 WHERE w BETWEEN 10 AND 20)
         AND z IN (SELECT z FROM t1 WHERE w BETWEEN 10 AND 20)
    }
  } {}
  do_test where2-8.18 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE +w BETWEEN 10 AND 20)
         AND y IN (SELECT y FROM t1 WHERE +w BETWEEN 10 AND 20)
         AND z IN (SELECT z FROM t1 WHERE +w BETWEEN 200 AND 300)
    }
  } {}
  do_test where2-8.19 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE +w BETWEEN 10 AND 20)
         AND y IN (SELECT y FROM t1 WHERE +w BETWEEN 200 AND 300)
         AND z IN (SELECT z FROM t1 WHERE +w BETWEEN 10 AND 20)
    }
  } {}
  do_test where2-8.20 {
    execsql {
      SELECT w FROM tx
       WHERE x IN (SELECT x FROM t1 WHERE +w BETWEEN 200 AND 300)
         AND y IN (SELECT y FROM t1 WHERE +w BETWEEN 10 AND 20)
         AND z IN (SELECT z FROM t1 WHERE +w BETWEEN 10 AND 20)
    }
  } {}
}  

# Make sure WHERE clauses of the form A=1 AND (B=2 OR B=3) are optimized
# when we have an index on A and B.
#
ifcapable or_opt&&tclvar {
  do_test where2-9.1 {
    execsql {
      BEGIN;
      CREATE TABLE t10(a,b,c);
      INSERT INTO t10 VALUES(1,1,1);
      INSERT INTO t10 VALUES(1,2,2);
      INSERT INTO t10 VALUES(1,3,3);
    }
    for {set i 4} {$i<=1000} {incr i} {
      execsql {INSERT INTO t10 VALUES(1,$i,$i)}
    }
    execsql {
      CREATE INDEX i10 ON t10(a,b);
      COMMIT;
      SELECT count(*) FROM t10;
    }
  } 1000
  ifcapable subquery {
    do_test where2-9.2 {
      count {
        SELECT * FROM t10 WHERE a=1 AND (b=2 OR b=3)
      }
    } {1 2 2 1 3 3 7}
  }
}

finish_test