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    1: # 2008 August 26
    2: #
    3: # The author disclaims copyright to this source code.  In place of
    4: # a legal notice, here is a blessing:
    5: #
    6: #    May you do good and not evil.
    7: #    May you find forgiveness for yourself and forgive others.
    8: #    May you share freely, never taking more than you give.
    9: #
   10: #***********************************************************************
   11: #
   12: # This file implements regression tests for SQLite library. 
   13: # Specifically, it tests that bug #3334 has been fixed by the
   14: # addition of restriction (19) to the subquery flattener optimization.
   15: #
   16: # $Id: tkt3334.test,v 1.1.1.1 2012/02/21 17:04:16 misho Exp $
   17: 
   18: 
   19: set testdir [file dirname $argv0]
   20: source $testdir/tester.tcl
   21: 
   22: do_test tkt3334-1.0 {
   23:   execsql {
   24:     CREATE TABLE t1(a,b);
   25:     INSERT INTO t1 VALUES(1,934);
   26:     INSERT INTO t1 VALUES(2,221);
   27:     INSERT INTO t1 VALUES(1,372);
   28:     INSERT INTO t1 VALUES(3,552);
   29:     INSERT INTO t1 VALUES(1,719);
   30:     INSERT INTO t1 VALUES(4,102);
   31:     SELECT * FROM t1 ORDER BY b;
   32:   }
   33: } {4 102 2 221 1 372 3 552 1 719 1 934}
   34: 
   35: do_test tkt3334-1.1 {
   36:   execsql {
   37:     SELECT a FROM (SELECT a FROM t1 ORDER BY b LIMIT 2) WHERE a=1;
   38:   }
   39: } {}
   40: do_test tkt3334-1.2 {
   41:   execsql {
   42:     SELECT count(*) FROM (SELECT a FROM t1 ORDER BY b LIMIT 2) WHERE a=1;
   43:   }
   44: } {0}
   45: do_test tkt3334-1.3 {
   46:   execsql {
   47:     SELECT a FROM (SELECT a FROM t1 ORDER BY b LIMIT 3) WHERE a=1;
   48:   }
   49: } {1}
   50: do_test tkt3334-1.4 {
   51:   execsql {
   52:     SELECT count(*) FROM (SELECT a FROM t1 ORDER BY b LIMIT 3) WHERE a=1;
   53:   }
   54: } {1}
   55: do_test tkt3334-1.5 {
   56:   execsql {
   57:     SELECT a FROM (SELECT a FROM t1 ORDER BY b LIMIT 99) WHERE a=1;
   58:   }
   59: } {1 1 1}
   60: do_test tkt3334-1.6 {
   61:   execsql {
   62:     SELECT count(*) FROM (SELECT a FROM t1 ORDER BY b LIMIT 99) WHERE a=1;
   63:   }
   64: } {3}
   65: do_test tkt3334-1.7 {
   66:   execsql {
   67:     SELECT a FROM (SELECT a FROM t1 ORDER BY b) WHERE a=1;
   68:   }
   69: } {1 1 1}
   70: do_test tkt3334-1.8 {
   71:   execsql {
   72:     SELECT count(*) FROM (SELECT a FROM t1 ORDER BY b) WHERE a=1;
   73:   }
   74: } {3}
   75: do_test tkt3334-1.9 {
   76:   execsql {
   77:     SELECT a FROM (SELECT a FROM t1) WHERE a=1;
   78:   }
   79: } {1 1 1}
   80: do_test tkt3334-1.10 {
   81:   execsql {
   82:     SELECT count(*) FROM (SELECT a FROM t1) WHERE a=1;
   83:   }
   84: } {3}