SQLite

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle SELECT statements in SQLite.
**
** $Id: select.c,v 1.234 2005/01/26 03:58:36 danielk1977 Exp $
*/
#include "sqliteInt.h"


/*
** Allocate a new Select structure and return a pointer to that
** structure.

    if( pGroupBy==0 ){
      sqlite3ErrorMsg(pParse, "a GROUP BY clause is required before HAVING");
      goto select_end;
    }
    if( sqlite3ExprResolveNames(pParse, pTabList, pEList, pNC, pHaving, 1, 1) ){
      goto select_end;
    }

  }
  if( pGroupBy ){


    isAgg = 1;
  }
  if( processOrderGroupBy(pParse,pOrderBy,pTabList,pEList,pNC,isAgg,"ORDER")
   || processOrderGroupBy(pParse,pGroupBy,pTabList,pEList,pNC,isAgg,"GROUP")
  ){
    goto select_end;
  }

# 2001 September 15
#
# 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 page cache subsystem.
#
# $Id: collate3.test,v 1.9 2005/01/26 03:58:36 danielk1977 Exp $

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

#
# Tests are organised as follows:
#

  }
} {0 {}}
do_test collate3-2.7.1 {
  catchsql {
    SELECT count(*) FROM collate3t1 GROUP BY c1;
  }
} {1 {no such collation sequence: string_compare}} 
# do_test collate3-2.7.2 {
#   catchsql {
#     SELECT * FROM collate3t1 GROUP BY c1;
#   }
# } {1 {GROUP BY may only be used on aggregate queries}}
do_test collate3-2.7.2 {
  catchsql {
    SELECT * FROM collate3t1 GROUP BY c1;
  }
} {1 {no such collation sequence: string_compare}} 
do_test collate3-2.8 {
  catchsql {
    SELECT DISTINCT c1 FROM collate3t1;
  }
} {1 {no such collation sequence: string_compare}} 

ifcapable compound {

#    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 aggregate functions and the
# GROUP BY and HAVING clauses of SELECT statements.
#
# $Id: select5.test,v 1.9 2005/01/26 03:58:36 danielk1977 Exp $

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

# Build some test data
#
execsql {

} {{}}
do_test select5-4.5 {
  execsql {
    SELECT sum(x) FROM t1 WHERE x>100
  }
} {0.0}

# Some tests for queries with a GROUP BY clause but no aggregate functions.
#
# Note: The query in test case 5-5.5 are not legal SQL. So if the 
# implementation changes in the future and it returns different results,
# this is not such a big deal.
#
do_test select5-5.1 {
  execsql {
    CREATE TABLE t2(a, b, c);
    INSERT INTO t2 VALUES(1, 2, 3);
    INSERT INTO t2 VALUES(1, 4, 5);
    INSERT INTO t2 VALUES(6, 4, 7);
    CREATE INDEX t2_idx ON t2(a);
  } 
} {}
do_test select5-5.2 {
  execsql {
    SELECT a FROM t2 GROUP BY a;
  } 
} {1 6}
do_test select5-5.3 {
  execsql {
    SELECT a FROM t2 WHERE a>2 GROUP BY a;
  } 
} {6}
do_test select5-5.4 {
  execsql {
    SELECT a, b FROM t2 GROUP BY a, b;
  } 
} {1 2 1 4 6 4}
do_test select5-5.5 {
  execsql {
    SELECT a, b FROM t2 GROUP BY a;
  } 
} {1 2 6 4}

finish_test

# 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 1.6 2005/01/26 03:58:37 danielk1977 Exp $


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

ifcapable compound {

} {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}]]
}
finish_test