src/test/indexexpr2.test

# 2017 April 11
#
# 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 indexexpr2

do_execsql_test 1 {
  CREATE TABLE t1(a, b);
  INSERT INTO t1 VALUES(1, 'one');
  INSERT INTO t1 VALUES(2, 'two');
  INSERT INTO t1 VALUES(3, 'three');

  CREATE INDEX i1 ON t1(b || 'x');
}

do_execsql_test 1.1 {
  SELECT 'TWOX' == (b || 'x') FROM t1 WHERE (b || 'x')>'onex'
} {0 0}

do_execsql_test 1.2 {
  SELECT 'TWOX' == (b || 'x') COLLATE nocase  FROM t1 WHERE (b || 'x')>'onex'
} {0 1}

do_execsql_test 2.0 {
  CREATE INDEX i2 ON t1(a+1);
}

do_execsql_test 2.1 {
  SELECT a+1, quote(a+1) FROM t1 ORDER BY 1;
} {2 2 3 3 4 4}

#-------------------------------------------------------------------------
# At one point SQLite was incorrectly using indexes on expressions to
# optimize ORDER BY and GROUP BY clauses even when the collation
# sequences of the query and index did not match (ticket [e20dd54ab0e4]).
# The following tests - 3.* - attempt to verify that this has been fixed.
#

reset_db
do_execsql_test 3.1.0 {
  CREATE TABLE t1(a, b);
  CREATE INDEX i1 ON t1(a, b);
} {}

do_eqp_test 3.1.1 {
  SELECT b FROM t1 WHERE b IS NOT NULL AND a IS NULL
  GROUP BY b COLLATE nocase
  ORDER BY b COLLATE nocase;
} {/USE TEMP B-TREE FOR GROUP BY/}

do_execsql_test 3.2.0 {
  CREATE TABLE t2(x);

  INSERT INTO t2 VALUES('.ABC');
  INSERT INTO t2 VALUES('.abcd');
  INSERT INTO t2 VALUES('.defg');
  INSERT INTO t2 VALUES('.DEF');
} {}

do_execsql_test 3.2.1 {
  SELECT x FROM t2 ORDER BY substr(x, 2) COLLATE nocase;
} {
  .ABC .abcd .DEF .defg
}

do_execsql_test 3.2.2 {
  CREATE INDEX i2 ON t2( substr(x, 2) );
  SELECT x FROM t2 ORDER BY substr(x, 2) COLLATE nocase;
} {
  .ABC .abcd .DEF .defg
}

do_execsql_test 3.3.0 {
  CREATE TABLE t3(x);
}

ifcapable json1 {
  do_eqp_test 3.3.1 {
    SELECT json_extract(x, '$.b') FROM t2
    WHERE json_extract(x, '$.b') IS NOT NULL AND json_extract(x, '$.a') IS NULL
    GROUP BY json_extract(x, '$.b') COLLATE nocase
    ORDER BY json_extract(x, '$.b') COLLATE nocase;
  } [string map {"\n  " \n} {
    QUERY PLAN
    |--SCAN TABLE t2
    `--USE TEMP B-TREE FOR GROUP BY
  }]

  do_execsql_test 3.3.2 {
    CREATE INDEX i3 ON t3(json_extract(x, '$.a'), json_extract(x, '$.b'));
  } {}

  do_eqp_test 3.3.3 {
    SELECT json_extract(x, '$.b') FROM t3
    WHERE json_extract(x, '$.b') IS NOT NULL AND json_extract(x, '$.a') IS NULL
    GROUP BY json_extract(x, '$.b') COLLATE nocase
    ORDER BY json_extract(x, '$.b') COLLATE nocase;
  } [string map {"\n  " \n} {
    QUERY PLAN
    |--SEARCH TABLE t3 USING INDEX i3 (<expr>=?)
    `--USE TEMP B-TREE FOR GROUP BY
  }]
}

do_execsql_test 3.4.0 {
  CREATE TABLE t4(a, b);
  INSERT INTO t4 VALUES('.ABC', 1);
  INSERT INTO t4 VALUES('.abc', 2);
  INSERT INTO t4 VALUES('.ABC', 3);
  INSERT INTO t4 VALUES('.abc', 4);
}

do_execsql_test 3.4.1 {
  SELECT * FROM t4
  WHERE substr(a, 2) = 'abc' COLLATE NOCASE
  ORDER BY substr(a, 2), b;
} {
  .ABC 1   .ABC 3   .abc 2   .abc 4
}

do_execsql_test 3.4.2 {
  CREATE INDEX i4 ON t4( substr(a, 2) COLLATE NOCASE, b );
  SELECT * FROM t4
  WHERE substr(a, 2) = 'abc' COLLATE NOCASE
  ORDER BY substr(a, 2), b;
} {
  .ABC 1   .ABC 3   .abc 2   .abc 4
}

do_execsql_test 3.4.3 {
  DROP INDEX i4;
  UPDATE t4 SET a = printf('%s%d',a,b);
  SELECT * FROM t4 ORDER BY Substr(a,-2) COLLATE nocase;
} {.ABC1 1 .abc2 2 .ABC3 3 .abc4 4}
do_execsql_test 3.4.4 {
  SELECT * FROM t4 ORDER BY Substr(a,-2) COLLATE binary;
} {.ABC1 1 .ABC3 3 .abc2 2 .abc4 4}

do_execsql_test 3.4.5 {
  CREATE INDEX i4 ON t4( Substr(a,-2) COLLATE nocase );
  SELECT * FROM t4 ORDER BY Substr(a,-2) COLLATE nocase;
} {.ABC1 1 .abc2 2 .ABC3 3 .abc4 4}
do_execsql_test 3.4.5eqp {
  EXPLAIN QUERY PLAN
  SELECT * FROM t4 ORDER BY Substr(a,-2) COLLATE nocase;
} {/SCAN TABLE t4 USING INDEX i4/}
do_execsql_test 3.4.6 {
  SELECT * FROM t4 ORDER BY Substr(a,-2) COLLATE binary;
} {.ABC1 1 .ABC3 3 .abc2 2 .abc4 4}

# 2014-09-15:  Verify that UPDATEs of columns not referenced by a
# index on expression do not modify the index.
#
unset -nocomplain cnt
set cnt 0
proc refcnt {x} {
  global cnt
  incr cnt
  return $x
}
db close
sqlite3 db :memory:
db function refcnt -deterministic refcnt
do_test 4.100 {
  db eval {
    CREATE TABLE t1(a,b,c,d,e,f);
    CREATE INDEX t1abc ON t1(refcnt(a+b+c));
  }
  set ::cnt
} {0}
do_test 4.110 {
  db eval {INSERT INTO t1 VALUES(1,2,3,4,5,6);}
  set ::cnt
  # The refcnt() function is invoked once to compute the index value
} {1}
do_test 4.120 {
  set ::cnt 0
  db eval {UPDATE t1 SET b=b+1;}
  set ::cnt
  # The refcnt() function is invoked twice, once to remove the old index
  # entry and a second time to insert the new one.
} {2}
do_test 4.130 {
  set ::cnt 0
  db eval {UPDATE t1 SET d=d+1;}
  set ::cnt
  # Refcnt() should not be invoked because that index does not change.
} {0}

# Additional test cases to show that UPDATE does not modify indexes that
# do not involve unchanged columns.
#
ifcapable vtab {
  load_static_extension db explain
  do_execsql_test 4.200 {
    CREATE TABLE t2(a,b,c,d,e,f);
    INSERT INTO t2 VALUES(2,3,4,5,6,7);
    CREATE INDEX t2abc ON t2(a+b+c);
    CREATE INDEX t2cd ON t2(c*d);
    CREATE INDEX t2def ON t2(d,e+25*f);
    SELECT sqlite_master.name
      FROM sqlite_master, explain('UPDATE t2 SET b=b+1')
     WHERE explain.opcode LIKE 'Open%'
       AND sqlite_master.rootpage=explain.p2
     ORDER BY 1;
  } {t2 t2abc}
  do_execsql_test 4.210 {
    SELECT sqlite_master.name
      FROM sqlite_master, explain('UPDATE t2 SET c=c+1')
     WHERE explain.opcode LIKE 'Open%'
       AND sqlite_master.rootpage=explain.p2
     ORDER BY 1;
  } {t2 t2abc t2cd}
  do_execsql_test 4.220 {
    SELECT sqlite_master.name
      FROM sqlite_master, explain('UPDATE t2 SET c=c+1, f=NULL')
     WHERE explain.opcode LIKE 'Open%'
       AND sqlite_master.rootpage=explain.p2
     ORDER BY 1;
  } {t2 t2abc t2cd t2def}
}

#-------------------------------------------------------------------------
# Test that ticket [d96eba87] has been fixed.
#
do_execsql_test 5.0 {
  CREATE TABLE t5(a INTEGER, b INTEGER);
  INSERT INTO t5 VALUES(2, 4), (3, 9);
}
do_execsql_test 5.1 {
  SELECT * FROM t5 WHERE abs(a)=2 or abs(b)=9;
} {2 4 3 9}
do_execsql_test 5.2 {
  CREATE INDEX t5a ON t5( abs(a) );
  CREATE INDEX t5b ON t5( abs(b) );
}
do_execsql_test 5.4 {
  SELECT * FROM t5 WHERE abs(a)=2 or abs(b)=9;
} {2 4 3 9}

#-------------------------------------------------------------------------
do_execsql_test 6.0 {
  CREATE TABLE x1(a INTEGER PRIMARY KEY, b);
  INSERT INTO x1 VALUES
      (1, 123), (2, '123'), (3, '123abc'), (4, 123.0), (5, 1234);
}

do_execsql_test 6.1.1 {
  SELECT a, b FROM x1 WHERE CAST(b AS INTEGER) = 123;
} {1 123   2 123   3 123abc  4 123.0}
do_execsql_test 6.1.2 {
  CREATE INDEX x1i ON x1( CAST(b AS INTEGER) );
  SELECT a, b FROM x1 WHERE CAST(b AS INTEGER) = 123;
} {1 123   2 123   3 123abc  4 123.0}
do_eqp_test 6.1.3 {
  SELECT a, b FROM x1 WHERE CAST(b AS INTEGER) = 123;
} {SEARCH TABLE x1 USING INDEX x1i (<expr>=?)}

do_execsql_test 6.2.1 {
  SELECT a, b FROM x1 WHERE CAST(b AS TEXT) = 123;
} {1 123   2 123}
do_execsql_test 6.2.2 {
  CREATE INDEX x1i2 ON x1( CAST(b AS TEXT) );
  SELECT a, b FROM x1 WHERE CAST(b AS TEXT) = 123;
} {1 123   2 123}
do_eqp_test 6.2.3 {
  SELECT a, b FROM x1 WHERE CAST(b AS TEXT) = 123;
} {SEARCH TABLE x1 USING INDEX x1i2 (<expr>=?)}

do_execsql_test 7.0 {
  CREATE TABLE IF NOT EXISTS t0(c0);
  INSERT INTO t0(c0) VALUES (-9223372036854775808);
  BEGIN;
}
do_catchsql_test 7.1 {
  CREATE INDEX i0 ON t0(ABS(c0));
} {1 {integer overflow}}
do_execsql_test 7.2 {
  COMMIT;
  SELECT sql FROM sqlite_master WHERE tbl_name = 't0';
  CREATE INDEX i0 ON t0(c0);
} {{CREATE TABLE t0(c0)}}
do_execsql_test 7.3 {
  REINDEX;
} {}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 8.0 {
  CREATE TABLE t0(c0);
  CREATE INDEX i0 ON t0(c0) WHERE c0 NOT NULL;
  INSERT INTO t0(c0) VALUES (NULL);
}

do_execsql_test 8.1.1 {
  SELECT * FROM t0 WHERE ~('' BETWEEN t0.c0 AND TRUE);
} {{}}
do_execsql_test 8.1.2 {
  SELECT ~('' BETWEEN t0.c0 AND TRUE) FROM t0;
} {-1}

foreach {tn expr} {
  1 " 0  ==  (34 BETWEEN c0 AND 33)"
  2 " 1  !=  (34 BETWEEN c0 AND 33)"
  3 "-1   <  (34 BETWEEN c0 AND 33)"
  4 "-1  <=  (34 BETWEEN c0 AND 33)"
  5 " 1   >  (34 BETWEEN c0 AND 33)"
  6 " 1  >=  (34 BETWEEN c0 AND 33)"
  7 " 1   -  (34 BETWEEN c0 AND 33)"
  8 "-1   +  (34 BETWEEN c0 AND 33)"
  9 " 1   |  (34 BETWEEN c0 AND 33)"
 10 " 1  <<  (34 BETWEEN c0 AND 33)"
 11 " 1  >>  (34 BETWEEN c0 AND 33)"
 12 " 1  ||  (34 BETWEEN c0 AND 33)"
} {
  do_execsql_test 8.3.$tn.1 "SELECT * FROM t0 WHERE $expr ORDER BY c0" { {} }
  do_execsql_test 8.3.$tn.2 "SELECT ($expr) IS TRUE FROM t0"           { 1 }
}

do_execsql_test 8.4 {
  CREATE TABLE t1(a, b);
  INSERT INTO t1 VALUES(1, 2), (3, 4);
  CREATE TABLE t2(x, y);
}

foreach {tn expr} {
  1 " 0  ==  (a=0 AND y=1)"
  2 " 1  !=  (a=0 AND y=1)"
  3 "-1  <   (a=0 AND y=1)"
  4 "-1  <=  (a=0 AND y=1)"
  5 " 1   >  (a=0 AND y=1)"
  6 " 1  >=  (a=0 AND y=1)"
  7 " 1   -  (a=0 AND y=1)"
  8 "-1   +  (a=0 AND y=1)"
  9 " 1   |  (a=0 AND y=1)"
  10 "1  <<  (a=0 AND y=1)"
  11 "1  >>  (a=0 AND y=1)"
  12 "1  ||  (a=0 AND y=1)"

  13 " 0  ==  (10 BETWEEN y AND b)"
  14 " 1  !=  (10 BETWEEN y AND b)"
  15 "-1  <   (10 BETWEEN y AND b)"
  16 "-1  <=  (10 BETWEEN y AND b)"
  17 " 1   >  (10 BETWEEN y AND b)"
  18 " 1  >=  (10 BETWEEN y AND b)"
  19 " 1   -  (10 BETWEEN y AND b)"
  20 "-1   +  (10 BETWEEN y AND b)"
  21 " 1   |  (10 BETWEEN y AND b)"
  22 " 1  <<  (10 BETWEEN y AND b)"
  23 " 1  >>  (10 BETWEEN y AND b)"
  24 " 1  ||  (10 BETWEEN y AND b)"

  25 " 1  ||  (10 BETWEEN y AND b)"
} {
  do_execsql_test 8.5.$tn.1 "
    SELECT * FROM t1 LEFT JOIN t2 WHERE $expr
  " {1 2 {} {} 3 4 {} {}}

  do_execsql_test 8.5.$tn.2 "
    SELECT ($expr) IS TRUE FROM t1 LEFT JOIN t2
  " {1 1}
}

finish_test