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test/subquery2.test
286 строк7 KB
drh
Fix an incorrect answer that might arise if a scalar query is both
09 дек 2025, 16:29
09 дек 2025, 16:2955385fb
# 2011 September 16
#
# 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 script is testing correlated subqueries
#
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set ::testprefix subquery2

ifcapable !subquery {
  finish_test
  return
}

do_test subquery2-1.1 {
  execsql {
    BEGIN;
    CREATE TABLE t1(a,b);
    INSERT INTO t1 VALUES(1,2);
    INSERT INTO t1 VALUES(3,4);
    INSERT INTO t1 VALUES(5,6);
    INSERT INTO t1 VALUES(7,8);
    CREATE TABLE t2(c,d);
    INSERT INTO t2 VALUES(1,1);
    INSERT INTO t2 VALUES(3,9);
    INSERT INTO t2 VALUES(5,25);
    INSERT INTO t2 VALUES(7,49);
    CREATE TABLE t3(e,f);
    INSERT INTO t3 VALUES(1,1);
    INSERT INTO t3 VALUES(3,27);
    INSERT INTO t3 VALUES(5,125);
    INSERT INTO t3 VALUES(7,343);
    COMMIT;
  }
  execsql {
    SELECT a FROM t1
     WHERE b IN (SELECT x+1 FROM (SELECT DISTINCT f/(a*a) AS x FROM t3));
  }
} {1 3 5 7}
do_test subquery2-1.2 {
  execsql {
    CREATE INDEX t1b ON t1(b);
    SELECT a FROM t1
     WHERE b IN (SELECT x+1 FROM (SELECT DISTINCT f/(a*a) AS x FROM t3));
  }
} {1 3 5 7}

do_test subquery2-1.11 {
  execsql {
    SELECT a FROM t1
     WHERE +b=(SELECT x+1 FROM (SELECT DISTINCT f/(a*a) AS x FROM t3));
  }
} {1}
do_test subquery2-1.12 {
  execsql {
    SELECT a FROM t1
     WHERE b=(SELECT x+1 FROM (SELECT DISTINCT f/(a*a) AS x FROM t3));
  }
} {1}

do_test subquery2-1.21 {
  execsql {
    SELECT a FROM t1
     WHERE +b=(SELECT x+1 FROM 
                 (SELECT DISTINCT f/d AS x FROM t2 JOIN t3 ON d*a=f))
  }
} {1 3 5 7}
do_test subquery2-1.22 {
  execsql {
    SELECT a FROM t1
     WHERE b=(SELECT x+1 FROM 
                 (SELECT DISTINCT f/d AS x FROM t2 JOIN t3 ON d*a=f))
  }
} {1 3 5 7}

#-------------------------------------------------------------------------
# Test that ticket d6b36be38a has been fixed.
do_execsql_test 2.1 {
  CREATE TABLE t4(a, b);
  CREATE TABLE t5(a, b);
  INSERT INTO t5 VALUES(3, 5);

  INSERT INTO t4 VALUES(1, 1);
  INSERT INTO t4 VALUES(2, 3);
  INSERT INTO t4 VALUES(3, 6);
  INSERT INTO t4 VALUES(4, 10);
  INSERT INTO t4 VALUES(5, 15);
}

do_execsql_test 2.2 {
  SELECT * 
  FROM (SELECT * FROM t4 ORDER BY a LIMIT -1 OFFSET 1) 
  LIMIT (SELECT a FROM t5)
} {2 3   3 6   4 10}

############################################################################
# Ticket http://sqlite.org/src/info/d11a6e908f (2014-09-20)
# Query planner fault on three-way nested join with compound inner SELECT 
#
do_execsql_test 3.0 {
  DROP TABLE IF EXISTS t1;
  DROP TABLE IF EXISTS t2;
  CREATE TABLE t1 (id INTEGER PRIMARY KEY, data TEXT);
  INSERT INTO t1(id,data) VALUES(9,'nine-a');
  INSERT INTO t1(id,data) VALUES(10,'ten-a');
  INSERT INTO t1(id,data) VALUES(11,'eleven-a');
  CREATE TABLE t2 (id INTEGER PRIMARY KEY, data TEXT);
  INSERT INTO t2(id,data) VALUES(9,'nine-b');
  INSERT INTO t2(id,data) VALUES(10,'ten-b');
  INSERT INTO t2(id,data) VALUES(11,'eleven-b');
  
  SELECT id FROM (
    SELECT id,data FROM (
       SELECT * FROM t1 UNION ALL SELECT * FROM t2
    )
    WHERE id=10 ORDER BY data
  );
} {10 10}
do_execsql_test 3.1 {
  SELECT data FROM (
     SELECT 'dummy', data FROM (
       SELECT data FROM t1 UNION ALL SELECT data FROM t1
     ) ORDER BY data
  );
} {eleven-a eleven-a nine-a nine-a ten-a ten-a}
do_execsql_test 3.2 {
  DROP TABLE IF EXISTS t3;
  DROP TABLE IF EXISTS t4;
  CREATE TABLE t3(id INTEGER, data TEXT);
  CREATE TABLE t4(id INTEGER, data TEXT);
  INSERT INTO t3 VALUES(4, 'a'),(2,'c');
  INSERT INTO t4 VALUES(3, 'b'),(1,'d');

  SELECT data, id FROM (
    SELECT id, data FROM (
       SELECT * FROM t3 UNION ALL SELECT * FROM t4
    ) ORDER BY data
  );
} {a 4 b 3 c 2 d 1}

#-------------------------------------------------------------------------

do_execsql_test 4.0 {
  CREATE TABLE t6(x);
}

foreach {tn sql} {
  1 {
    SELECT 'abc' FROM (
        SELECT x FROM t6 ORDER BY 1
        UNION ALL
        SELECT x FROM t6
    )
  }
  2 {
    SELECT 'abc' FROM (
        SELECT x FROM t6
        UNION ALL
        SELECT x FROM t6 ORDER BY 1
        UNION ALL
        SELECT x FROM t6
    )
  }
  3 {
    SELECT 'abc' FROM (
        SELECT x FROM t6 ORDER BY 1
        UNION ALL
        SELECT x FROM t6 ORDER BY 1
        UNION ALL
        SELECT x FROM t6
    )
  }
  4 {
    SELECT 'abc' FROM (
        SELECT x FROM t6
        UNION ALL
        SELECT x FROM t6 ORDER BY 1
        UNION ALL
        SELECT x FROM t6 ORDER BY 1
        UNION ALL
        SELECT x FROM t6
    )
  }
} {
  do_catchsql_test 4.$tn $sql [list {*}{
    1 {ORDER BY clause should come after UNION ALL not before}
  }]
}

#-------------------------------------------------------------------------
# Test that ticket [9cdc5c46] is fixed.
#
reset_db
do_execsql_test 5.0 {
  CREATE TABLE t1(x);
  INSERT INTO t1 VALUES('ALFKI');
  INSERT INTO t1 VALUES('ANATR');

  CREATE TABLE t2(y, z);
  CREATE INDEX t2y ON t2 (y);
  INSERT INTO t2 VALUES('ANATR', '1997-08-08 00:00:00');
  INSERT INTO t2 VALUES('ALFKI', '1997-08-25 00:00:00');
}
do_execsql_test 5.1 {
  SELECT ( SELECT y FROM t2 WHERE x = y ORDER BY y, z) FROM t1;
} {ALFKI ANATR}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 6.0 {
  CREATE TABLE t1(x);
  INSERT INTO t1 VALUES(1234);
}

do_execsql_test 6.1 {
  SELECT DISTINCT 'string' FROM t1 LIMIT 1 OFFSET 5;
}

do_execsql_test 6.2 {
  SELECT (
      SELECT 'string' FROM t1 LIMIT 1 OFFSET 5
  );
} {{}}

do_execsql_test 6.3 {
  SELECT (
      SELECT DISTINCT 'string' FROM t1 LIMIT 1 OFFSET 5
  );
} {{}}

do_execsql_test 6.4 {
  SELECT (
      SELECT DISTINCT 'string' FROM t1 ORDER BY 1 LIMIT 1 OFFSET 5
  );
} {{}}

do_execsql_test 6.5 {
  SELECT (
      SELECT 'string' FROM t1 ORDER BY 1 LIMIT 1 OFFSET 5
  );
} {{}}

do_execsql_test 6.6 {
  SELECT (SELECT DISTINCT x, x FROM t1 LIMIT 1 OFFSET 5)==(1234, 1234)
} {{}}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 7.0 {
  CREATE TABLE t1(x);
  CREATE INDEX i1 ON t1(x);
  INSERT INTO t1 VALUES(1234);
}

do_execsql_test 7.1 {
  SELECT (
    SELECT DISTINCT 'string' FROM t1 ORDER BY x LIMIT 1 OFFSET 5
  );
} {{}}

do_execsql_test 7.2 {
  DROP INDEX i1;
  CREATE UNIQUE INDEX i1 ON t1(x);
}

do_execsql_test 7.3 {
  SELECT (
    SELECT DISTINCT x FROM t1 ORDER BY 1 LIMIT 1 OFFSET 5
  );
} {{}}

do_execsql_test 7.4 {
  SELECT (SELECT DISTINCT x FROM t1 ORDER BY +x LIMIT 1 OFFSET 0);
} {1234}

finish_test