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 1.147 2004/01/14 13:38:54 drh Exp $
*/
#include "sqliteInt.h"


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

    }

    /* If we are creating a set for an "expr IN (SELECT ...)" construct,
    ** then there should be a single item on the stack.  Write this
    ** item into the set table with bogus data.
    */
    case SRT_Set: {
      int addr1 = sqliteVdbeCurrentAddr(v);
      int addr2;
      assert( nColumn==1 );
      sqliteVdbeAddOp(v, OP_NotNull, -1, addr1+3);
      sqliteVdbeAddOp(v, OP_Pop, 1, 0);
      addr2 = sqliteVdbeAddOp(v, OP_Goto, 0, 0);
      if( pOrderBy ){
        pushOntoSorter(pParse, v, pOrderBy);
      }else{
        sqliteVdbeAddOp(v, OP_String, 0, 0);
        sqliteVdbeAddOp(v, OP_PutStrKey, iParm, 0);
      }
      sqliteVdbeChangeP2(v, addr2, sqliteVdbeCurrentAddr(v));
      break;
    }

    /* If this is a scalar select that is part of an expression, then
    ** store the results in the appropriate memory cell and break out
    ** of the scan loop.
    */

      sqliteVdbeAddOp(v, OP_NewRecno, iParm, 0);
      sqliteVdbeAddOp(v, OP_Pull, 1, 0);
      sqliteVdbeAddOp(v, OP_PutIntKey, iParm, 0);
      break;
    }
    case SRT_Set: {
      assert( nColumn==1 );
      sqliteVdbeAddOp(v, OP_NotNull, -1, sqliteVdbeCurrentAddr(v)+3);
      sqliteVdbeAddOp(v, OP_Pop, 1, 0);
      sqliteVdbeAddOp(v, OP_Goto, 0, sqliteVdbeCurrentAddr(v)+3);
      sqliteVdbeAddOp(v, OP_String, 0, 0);
      sqliteVdbeAddOp(v, OP_PutStrKey, iParm, 0);
      break;
    }
    case SRT_Mem: {
      assert( nColumn==1 );
      sqliteVdbeAddOp(v, OP_MemStore, iParm, 1);

#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file implements tests for miscellanous features that were
# left out of other test files.
#
# $Id: misc3.test,v 1.5 2004/01/14 13:38:54 drh Exp $

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

# Ticket #529.  Make sure an ABORT does not damage the in-memory cache
# that will be used by subsequent statements in the same transaction.
#

} {2147483647 2147483646}
do_test misc3-3.14 {
  execsql {
    SELECT * FROM t2 WHERE a>=0 AND a<2147483647 ORDER BY a DESC;
  }
} {2147483646}

# Ticket #565.  A stack overflow is occurring when the subquery to the
# right of an IN operator contains many NULLs
#
do_test misc3-4.1 {
  execsql {
    CREATE TABLE t3(a INTEGER PRIMARY KEY, b);
    INSERT INTO t3(b) VALUES('abc');
    INSERT INTO t3(b) VALUES('xyz');
    INSERT INTO t3(b) VALUES(NULL);
    INSERT INTO t3(b) VALUES(NULL);
    INSERT INTO t3(b) SELECT b||'d' FROM t3;
    INSERT INTO t3(b) SELECT b||'e' FROM t3;
    INSERT INTO t3(b) SELECT b||'f' FROM t3;
    INSERT INTO t3(b) SELECT b||'g' FROM t3;
    INSERT INTO t3(b) SELECT b||'h' FROM t3;
    SELECT count(a), count(b) FROM t3;
  }
} {128 64}
do_test misc3-4.2 {
  execsql {
    SELECT count(a) FROM t3 WHERE b IN (SELECT b FROM t3);
  }
} {64}
do_test misc3-4.3 {
  execsql {
    SELECT count(a) FROM t3 WHERE b IN (SELECT b FROM t3 ORDER BY a+1);
  }
} {64}

finish_test