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 1.236 2005/01/30 11:11:44 danielk1977 Exp $
*/
#include "sqliteInt.h"


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

  Table *pTab;
  int i, j;
  ExprList *pEList;
  Column *aCol, *pCol;

  if( prepSelectStmt(pParse, pSelect) ){
    return 0;
  }
  if( sqlite3SelectResolve(pParse, pSelect, 0) ){
    return 0;
  }
  pTab = sqliteMalloc( sizeof(Table) );
  if( pTab==0 ){
    return 0;
  }
  pTab->zName = zTabName ? sqliteStrDup(zTabName) : 0;
  pEList = pSelect->pEList;

#ifndef SQLITE_OMIT_SUBQUERY
      /* A sub-query in the FROM clause of a SELECT */
      assert( pFrom->pSelect!=0 );
      if( pFrom->zAlias==0 ){
        pFrom->zAlias =
          sqlite3MPrintf("sqlite_subquery_%p_", (void*)pFrom->pSelect);
      }

      pFrom->pTab = pTab = 
        sqlite3ResultSetOfSelect(pParse, pFrom->zAlias, pFrom->pSelect);
      if( pTab==0 ){
        return 1;
      }
      /* The isTransient flag indicates that the Table structure has been
      ** dynamically allocated and may be freed at any time.  In other words,

# 2005 January 19
#
# 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
#
# $Id: subquery.test,v 1.4 2005/01/30 11:11:44 danielk1977 Exp $
#

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

ifcapable !subquery {
  finish_test

do_test subquery-1.7 {
  execsql {
    SELECT a, x FROM t2, t1 WHERE t1.a = (SELECT x);
  }
} {1 1 3 3 5 5 7 7}

# Try an aggregate in both the subquery and the parent query.
do_test subquery-1.8 {
  execsql {
    SELECT count(*) FROM t1 WHERE a > (SELECT count(*) FROM t2);
  }
} {2}

# Test a correlated subquery disables the "only open the index" optimization.
do_test subquery-1.9.1 {
  execsql {
    SELECT (y*2)>b FROM t1, t2 WHERE a=x;
  }
} {0 1 1 1}
do_test subquery-1.9.2 {
  execsql {
    SELECT a FROM t1 WHERE (SELECT (y*2)>b FROM t2 WHERE a=x); 
  }
} {3 5 7}


#------------------------------------------------------------------
# The following test cases - subquery-2.* - are not logically
# organized. They're here largely because they were failing during
# one stage of development of sub-queries.
#

# 2002 February 26
#
# 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 VIEW statements.
#
# $Id: view.test,v 1.24 2005/01/30 11:11:44 danielk1977 Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl

# Omit this entire file if the library is not configured with views enabled.
ifcapable !view {
  finish_test
  return

  }
} {1}
do_test view-10.2 {
  execsql {
    SELECT * FROM v_t3_b;
  }
} {2}

do_test view-11.1 {
  execsql {
    CREATE TABLE t4(a COLLATE NOCASE);
    INSERT INTO t4 VALUES('This');
    INSERT INTO t4 VALUES('this');
    INSERT INTO t4 VALUES('THIS');
    SELECT * FROM t4 WHERE a = 'THIS';
  }
} {This this THIS}
do_test view-11.2 {
  execsql {
    SELECT * FROM (SELECT * FROM t4) WHERE a = 'THIS';
  }
} {This this THIS}
do_test view-11.3 {
  execsql {
    CREATE VIEW v11 AS SELECT * FROM t4;
    SELECT * FROM v11 WHERE a = 'THIS';
  }
} {This this THIS}

finish_test