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Overview
Comment:Make sure LIMITs are handled correctly on UNION operators. Ticket #1035. (CVS 2166)
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SHA1: ece0085f86bd715c95a6c59f41b4a97de2555faf
User & Date: drh 2004-12-16 21:09:17
Context
2004-12-17
15:41
Add 'copy' method for tcl interface. Behaves similar to shell .import or COPY statment in 2.x. (CVS 2167) check-in: a9311d9d user: tpoindex tags: trunk
2004-12-16
21:09
Make sure LIMITs are handled correctly on UNION operators. Ticket #1035. (CVS 2166) check-in: ece0085f user: drh tags: trunk
2004-12-14
03:34
Minor code and comment cleanup. (CVS 2165) check-in: d012628a user: drh tags: trunk
Changes
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Changes to src/select.c.

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**    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 1.217 2004/11/23 01:47:30 drh Exp $
*/
#include "sqliteInt.h"


/*
** Allocate a new Select structure and return a pointer to that
** structure.
................................................................................
      nOffset = p->nOffset;
      p->nOffset = 0;
      rc = sqlite3Select(pParse, p, op, unionTab, 0, 0, 0, aff);
      p->pPrior = pPrior;
      p->pOrderBy = pOrderBy;
      p->nLimit = nLimit;
      p->nOffset = nOffset;


      if( rc ){
        goto multi_select_end;
      }


      /* Convert the data in the temporary table into whatever form
      ** it is that we currently need.







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**    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 1.218 2004/12/16 21:09:17 drh Exp $
*/
#include "sqliteInt.h"


/*
** Allocate a new Select structure and return a pointer to that
** structure.
................................................................................
      nOffset = p->nOffset;
      p->nOffset = 0;
      rc = sqlite3Select(pParse, p, op, unionTab, 0, 0, 0, aff);
      p->pPrior = pPrior;
      p->pOrderBy = pOrderBy;
      p->nLimit = nLimit;
      p->nOffset = nOffset;
      p->iLimit = -1;
      p->iOffset = -1;
      if( rc ){
        goto multi_select_end;
      }


      /* Convert the data in the temporary table into whatever form
      ** it is that we currently need.

Changes to test/limit.test.

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#    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 the LIMIT ... OFFSET ... clause
#  of SELECT statements.
#
# $Id: limit.test,v 1.18 2004/11/22 13:35:42 danielk1977 Exp $

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

# Build some test data
#
execsql {
................................................................................
  }
} {5 6 7 8 9}
do_test limit-8.3 {
  execsql {
    SELECT DISTINCT round(x/100) FROM t3 LIMIT 5 OFFSET 25;
  }
} {25 26 27 28 29}

































finish_test







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#    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 the LIMIT ... OFFSET ... clause
#  of SELECT statements.
#
# $Id: limit.test,v 1.19 2004/12/16 21:09:18 drh Exp $

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

# Build some test data
#
execsql {
................................................................................
  }
} {5 6 7 8 9}
do_test limit-8.3 {
  execsql {
    SELECT DISTINCT round(x/100) FROM t3 LIMIT 5 OFFSET 25;
  }
} {25 26 27 28 29}

# Make sure limits on multiple subqueries work correctly.
# Ticket #1035
#
do_test limit-9.1 {
  execsql {
    SELECT * FROM (SELECT * FROM t6 LIMIT 3);
  }
} {1 2 3}
do_test limit-9.2 {
  execsql {
    CREATE TABLE t7 AS SELECT * FROM t6;
    SELECT * FROM (SELECT * FROM t7 LIMIT 3);
  }
} {1 2 3}
do_test limit-9.3 {
  execsql {
    SELECT * FROM (SELECT * FROM t6 LIMIT 3)
    UNION
    SELECT * FROM (SELECT * FROM t7 LIMIT 3)
    ORDER BY 1
  }
} {1 2 3}
do_test limit-9.4 {
  execsql {
    SELECT * FROM (SELECT * FROM t6 LIMIT 3)
    UNION
    SELECT * FROM (SELECT * FROM t7 LIMIT 3)
    ORDER BY 1
    LIMIT 2
  }
} {1 2}

finish_test