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SQLite training in Houston TX on 2019-11-05 (details)
Part of the 2019 Tcl Conference

Artifact 45606f9afbe2056058c7d75fc33e5092e65ec770:


# 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 compute SELECT statements and nested
# views.
#
# $Id: select7.test,v 1.10 2007/06/07 10:55:36 drh Exp $


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

ifcapable compound {

# A 3-way INTERSECT.  Ticket #875
ifcapable tempdb {
  do_test select7-1.1 {
    execsql {
      create temp table t1(x);
      insert into t1 values('amx');
      insert into t1 values('anx');
      insert into t1 values('amy');
      insert into t1 values('bmy');
      select * from t1 where x like 'a__'
        intersect select * from t1 where x like '_m_'
        intersect select * from t1 where x like '__x';
    }
  } {amx}
}


# Nested views do not handle * properly.  Ticket #826.
#
ifcapable view {
do_test select7-2.1 {
  execsql {
    CREATE TABLE x(id integer primary key, a TEXT NULL);
    INSERT INTO x (a) VALUES ('first');
    CREATE TABLE tempx(id integer primary key, a TEXT NULL);
    INSERT INTO tempx (a) VALUES ('t-first');
    CREATE VIEW tv1 AS SELECT x.id, tx.id FROM x JOIN tempx tx ON tx.id=x.id;
    CREATE VIEW tv1b AS SELECT x.id, tx.id FROM x JOIN tempx tx on tx.id=x.id;
    CREATE VIEW tv2 AS SELECT * FROM tv1 UNION SELECT * FROM tv1b;
    SELECT * FROM tv2;
  }
} {1 1}
} ;# ifcapable view

} ;# ifcapable compound

# Do not allow GROUP BY without an aggregate. Ticket #1039.
#
# Change: force any query with a GROUP BY clause to be processed as
# an aggregate query, whether it contains aggregates or not.
#
ifcapable subquery {
  # do_test select7-3.1 {
  #   catchsql {
  #     SELECT * FROM (SELECT * FROM sqlite_master) GROUP BY name
  #   }
  # } {1 {GROUP BY may only be used on aggregate queries}}
  do_test select7-3.1 {
    catchsql {
      SELECT * FROM (SELECT * FROM sqlite_master) GROUP BY name
    }
  } [list 0 [execsql {SELECT * FROM sqlite_master ORDER BY name}]]
}

# Ticket #2018 - Make sure names are resolved correctly on all
# SELECT statements of a compound subquery.
#
ifcapable {subquery && compound} {
  do_test select7-4.1 {
    execsql {
      CREATE TABLE IF NOT EXISTS photo(pk integer primary key, x);
      CREATE TABLE IF NOT EXISTS tag(pk integer primary key, fk int, name);
    
      SELECT P.pk from PHOTO P WHERE NOT EXISTS ( 
           SELECT T2.pk from TAG T2 WHERE T2.fk = P.pk 
           EXCEPT 
           SELECT T3.pk from TAG T3 WHERE T3.fk = P.pk AND T3.name LIKE '%foo%'
      );
    }
  } {}
  do_test select7-4.2 {
    execsql {
      INSERT INTO photo VALUES(1,1);
      INSERT INTO photo VALUES(2,2);
      INSERT INTO photo VALUES(3,3);
      INSERT INTO tag VALUES(11,1,'one');
      INSERT INTO tag VALUES(12,1,'two');
      INSERT INTO tag VALUES(21,1,'one-b');
      SELECT P.pk from PHOTO P WHERE NOT EXISTS ( 
           SELECT T2.pk from TAG T2 WHERE T2.fk = P.pk 
           EXCEPT 
           SELECT T3.pk from TAG T3 WHERE T3.fk = P.pk AND T3.name LIKE '%foo%'
      );
    }
  } {2 3}
}

# ticket #2347
#
ifcapable {subquery && compound} {
  do_test select7-5.1 {
    catchsql {
      CREATE TABLE t2(a,b);
      SELECT 5 IN (SELECT a,b FROM t2);
    }
  } [list 1 \
     {only a single result allowed for a SELECT that is part of an expression}]
  do_test select7-5.2 {
    catchsql {
      SELECT 5 IN (SELECT * FROM t2);
    }
  } [list 1 \
     {only a single result allowed for a SELECT that is part of an expression}]
  do_test select7-5.3 {
    catchsql {
      SELECT 5 IN (SELECT a,b FROM t2 UNION SELECT b,a FROM t2);
    }
  } [list 1 \
     {only a single result allowed for a SELECT that is part of an expression}]
  do_test select7-5.4 {
    catchsql {
      SELECT 5 IN (SELECT * FROM t2 UNION SELECT * FROM t2);
    }
  } [list 1 \
     {only a single result allowed for a SELECT that is part of an expression}]
}

# Verify that an error occurs if you have too many terms on a
# compound select statement.
#
if {$SQLITE_MAX_COMPOUND_SELECT>0} {
  set sql {SELECT 0}
  set result 0
  for {set i 1} {$i<$SQLITE_MAX_COMPOUND_SELECT} {incr i} {
    append sql " UNION ALL SELECT $i"
    lappend result $i
  }
  do_test select7-6.1 {
    catchsql $sql
  } [list 0 $result]
  append sql { UNION ALL SELECT 99999999}
  do_test select7-6.2 {
    catchsql $sql
  } {1 {too many terms in compound SELECT}}
}

finish_test