sqlite/test/join2.test

# 2002 May 24
#
# 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.
#
# This file implements tests for joins, including outer joins.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix join2

do_test join2-1.1 {
  execsql {
    CREATE TABLE t1(a,b);
    INSERT INTO t1 VALUES(1,11);
    INSERT INTO t1 VALUES(2,22);
    INSERT INTO t1 VALUES(3,33);
    SELECT * FROM t1;
  }  
} {1 11 2 22 3 33}
do_test join2-1.2 {
  execsql {
    CREATE TABLE t2(b,c);
    INSERT INTO t2 VALUES(11,111);
    INSERT INTO t2 VALUES(33,333);
    INSERT INTO t2 VALUES(44,444);
    SELECT * FROM t2;
  }  
} {11 111 33 333 44 444};
do_test join2-1.3 {
  execsql {
    CREATE TABLE t3(c,d);
    INSERT INTO t3 VALUES(111,1111);
    INSERT INTO t3 VALUES(444,4444);
    INSERT INTO t3 VALUES(555,5555);
    SELECT * FROM t3;
  }  
} {111 1111 444 4444 555 5555}

do_test join2-1.4 {
  execsql {
    SELECT * FROM
      t1 NATURAL JOIN t2 NATURAL JOIN t3
  }
} {1 11 111 1111}
do_test join2-1.5 {
  execsql {
    SELECT * FROM
      t1 NATURAL JOIN t2 NATURAL LEFT OUTER JOIN t3
  }
} {1 11 111 1111 3 33 333 {}}
do_test join2-1.6 {
  execsql {
    SELECT * FROM
      t1 NATURAL LEFT OUTER JOIN t2 NATURAL JOIN t3
  }
} {1 11 111 1111}
ifcapable subquery {
  do_test join2-1.7 {
    execsql {
      SELECT * FROM
        t1 NATURAL LEFT OUTER JOIN (t2 NATURAL JOIN t3)
    }
  } {1 11 111 1111 2 22 {} {} 3 33 {} {}}
}

#-------------------------------------------------------------------------
# Check that ticket [25e335f802ddc] has been resolved. It should be an
# error for the ON clause of a LEFT JOIN to refer to a table to its right.
#
do_execsql_test 2.0 {
  CREATE TABLE aa(a);
  CREATE TABLE bb(b);
  CREATE TABLE cc(c);
  INSERT INTO aa VALUES('one');
  INSERT INTO bb VALUES('one');
  INSERT INTO cc VALUES('one');
}

do_catchsql_test 2.1 {
  SELECT * FROM aa LEFT JOIN cc ON (a=b) JOIN bb ON (b=c);
} {1 {ON clause references tables to its right}}
do_catchsql_test 2.2 {
  SELECT * FROM aa JOIN cc ON (a=b) JOIN bb ON (b=c);
} {0 {one one one}}

#-------------------------------------------------------------------------
# Test that a problem causing where.c to overlook opportunities to
# omit unnecessary tables from a LEFT JOIN when UNIQUE, NOT NULL column 
# that makes this possible happens to be the leftmost in its table.
#
reset_db
do_execsql_test 3.0 {
  CREATE TABLE t1(k1 INTEGER PRIMARY KEY, k2, k3);
  CREATE TABLE t2(k2 INTEGER PRIMARY KEY, v2);

  -- Prior to this problem being fixed, table t3_2 would be omitted from
  -- the join queries below, but if t3_1 were used in its place it would
  -- not.
  CREATE TABLE t3_1(k3 PRIMARY KEY, v3) WITHOUT ROWID;
  CREATE TABLE t3_2(v3, k3 PRIMARY KEY) WITHOUT ROWID;
}

do_eqp_test 3.1 {
  SELECT v2 FROM t1 LEFT JOIN t2 USING (k2) LEFT JOIN t3_1 USING (k3);
} {
  0 0 0 {SCAN TABLE t1} 
  0 1 1 {SEARCH TABLE t2 USING INTEGER PRIMARY KEY (rowid=?)}
}

do_eqp_test 3.2 {
  SELECT v2 FROM t1 LEFT JOIN t2 USING (k2) LEFT JOIN t3_2 USING (k3);
} {
  0 0 0 {SCAN TABLE t1} 
  0 1 1 {SEARCH TABLE t2 USING INTEGER PRIMARY KEY (rowid=?)}
}

finish_test