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test/cse.test
200 строк6 KB
dan
Avoid factoring out constant expressions on the LHS of an IN(...) operator, as the IN(...) operation may affect the affinity of these values.
03 апр 2020, 22:37
03 апр 2020, 22:37c59b4ac
# 2008 April 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.
#
#***********************************************************************
#
# Test cases designed to exercise and verify the logic for
# factoring constant expressions out of loops and for
# common subexpression eliminations.
#
# $Id: cse.test,v 1.6 2008/08/04 03:51:24 danielk1977 Exp $
#

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

do_test cse-1.1 {
  execsql {
    CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d, e, f);
    INSERT INTO t1 VALUES(1,11,12,13,14,15);
    INSERT INTO t1 VALUES(2,21,22,23,24,25);
  }
  execsql {
    SELECT b, -b, ~b, NOT b, NOT NOT b, b-b, b+b, b*b, b/b, b FROM t1
  }
} {11 -11 -12 0 1 0 22 121 1 11 21 -21 -22 0 1 0 42 441 1 21}
do_test cse-1.2 {
  execsql {
    SELECT b, b%b, b==b, b!=b, b<b, b<=b, b IS NULL, b NOT NULL, b FROM t1
  }
} {11 0 1 0 0 1 0 1 11 21 0 1 0 0 1 0 1 21}
do_test cse-1.3 {
  execsql {
    SELECT b, abs(b), coalesce(b,-b,NOT b,c,NOT c), c, -c FROM t1;
  }
} {11 11 11 12 -12 21 21 21 22 -22}
do_test cse-1.4 {
  execsql {
    SELECT CASE WHEN a==1 THEN b ELSE c END, b, c FROM t1
  }
} {11 11 12 22 21 22}
do_test cse-1.5 {
  execsql {
    SELECT CASE a WHEN 1 THEN b WHEN 2 THEN c ELSE d END, b, c, d FROM t1
  }
} {11 11 12 13 22 21 22 23}
do_test cse-1.6.1 {
  execsql {
    SELECT CASE b WHEN 11 THEN -b WHEN 21 THEN -c ELSE -d END, b, c, d FROM t1
  }
} {-11 11 12 13 -22 21 22 23}
do_test cse-1.6.2 {
  execsql {
    SELECT CASE b+1 WHEN c THEN d WHEN e THEN f ELSE 999 END, b, c, d FROM t1
  }
} {13 11 12 13 23 21 22 23}
do_test cse-1.6.3 {
  execsql {
    SELECT CASE WHEN b THEN d WHEN e THEN f ELSE 999 END, b, c, d FROM t1
  }
} {13 11 12 13 23 21 22 23}
do_test cse-1.6.4 {
  execsql {
    SELECT b, c, d, CASE WHEN b THEN d WHEN e THEN f ELSE 999 END FROM t1
  }
} {11 12 13 13 21 22 23 23}
do_test cse-1.6.5 {
  execsql {
    SELECT b, c, d, CASE WHEN 0 THEN d WHEN e THEN f ELSE 999 END FROM t1
  }
} {11 12 13 15 21 22 23 25}
do_test cse-1.7 {
  execsql {
    SELECT a, -a, ~a, NOT a, NOT NOT a, a-a, a+a, a*a, a/a, a FROM t1
  }
} {1 -1 -2 0 1 0 2 1 1 1 2 -2 -3 0 1 0 4 4 1 2}
do_test cse-1.8 {
  execsql {
    SELECT a, a%a, a==a, a!=a, a<a, a<=a, a IS NULL, a NOT NULL, a FROM t1
  }
} {1 0 1 0 0 1 0 1 1 2 0 1 0 0 1 0 1 2}
do_test cse-1.9 {
  execsql {
    SELECT NOT b, ~b, NOT NOT b, b FROM t1
  }
} {0 -12 1 11 0 -22 1 21}
do_test cse-1.10 {
  execsql {
    SELECT CAST(b AS integer), typeof(b), CAST(b AS text), typeof(b) FROM t1
  }
} {11 integer 11 integer 21 integer 21 integer}
ifcapable compound {
  do_test cse-1.11 { 
    execsql {
      SELECT *,* FROM t1 WHERE a=2
      UNION ALL
      SELECT *,* FROM t1 WHERE a=1
    }
  } {2 21 22 23 24 25 2 21 22 23 24 25 1 11 12 13 14 15 1 11 12 13 14 15}
  do_test cse-1.12 { 
    execsql {
      SELECT coalesce(b,c,d,e), a, b, c, d, e FROM t1 WHERE a=2
      UNION ALL
      SELECT coalesce(e,d,c,b), e, d, c, b, a FROM t1 WHERE a=1
    }
  } {21 2 21 22 23 24 14 14 13 12 11 1}
}
do_test cse-1.13 {
  execsql {
     SELECT upper(b), typeof(b), b FROM t1
  }
} {11 integer 11 21 integer 21}
do_test cse-1.14 {
  execsql {
     SELECT b, typeof(b), upper(b), typeof(b), b FROM t1
  }
} {11 integer 11 integer 11 21 integer 21 integer 21}

# Overflow the column cache.  Create queries involving more and more
# columns until the cache overflows.  Verify correct operation throughout.
#
do_test cse-2.1 {
  execsql {
    CREATE TABLE t2(a0,a1,a2,a3,a4,a5,a6,a7,a8,a9,
                    a10,a11,a12,a13,a14,a15,a16,a17,a18,a19,
                    a20,a21,a22,a23,a24,a25,a26,a27,a28,a29,
                    a30,a31,a32,a33,a34,a35,a36,a37,a38,a39,
                    a40,a41,a42,a43,a44,a45,a46,a47,a48,a49);
    INSERT INTO t2 VALUES(0,1,2,3,4,5,6,7,8,9,
                    10,11,12,13,14,15,16,17,18,19,
                    20,21,22,23,24,25,26,27,28,29,
                    30,31,32,33,34,35,36,37,38,39,
                    40,41,42,43,44,45,46,47,48,49);
    SELECT * FROM t2;
  }
} {0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49}

for {set i 1} {$i<100} {incr i} {
  set n [expr {int(rand()*44)+5}]
  set colset {}
  set answer {}
  for {set j 0} {$j<$n} {incr j} {
    set r [expr {$j+int(rand()*5)}]
    if {$r>49} {set r [expr {99-$r}]}
    lappend colset a$j a$r 
    lappend answer $j $r
  }
  set sql "SELECT [join $colset ,] FROM t2"
  do_test cse-2.2.$i {
    # explain $::sql
    execsql $::sql
  } $answer
}

#-------------------------------------------------------------------------
# Ticket fd1bda016d1a
#
reset_db
do_execsql_test 3.0 {
  CREATE TABLE t1(a TEXT, b);
  INSERT INTO t1 VALUES('hello', 0);
  INSERT INTO t1 VALUES('world', 0);

  CREATE TABLE t2(x TEXT);
  INSERT INTO t2 VALUES('hello');
  INSERT INTO t2 VALUES('world');

  CREATE TABLE t3(y);
  INSERT INTO t3 VALUES(1000);
} {}

do_execsql_test 3.1 {
  SELECT 1000 = y FROM t3
} {1}

do_execsql_test 3.2 {
  SELECT 1000 IN (SELECT x FROM t2), 1000 = y FROM t3
} {0 1}

do_execsql_test 3.3 {
  SELECT 0 IN (SELECT a), (SELECT a LIMIT 0) FROM t1 
} {0 {} 0 {}}

do_execsql_test 3.4 {
  SELECT 0 IN (SELECT a) FROM t1 WHERE a = 'hello' OR (SELECT a LIMIT 0);
} {0}

do_execsql_test 3.5 {
  CREATE TABLE v0(v1 VARCHAR0);
  INSERT INTO v0 VALUES(2), (3);
  SELECT 0 IN(SELECT v1) FROM v0 WHERE v1 = 2 OR(SELECT v1 LIMIT 0);
} {0}

finish_test