wasCSharpSQLite – Blame information for rev 7
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1 | office | 1 | # 2007 Sep 12 |
2 | # |
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3 | # The author disclaims copyright to this source code. In place of |
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4 | # a legal notice, here is a blessing: |
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5 | # |
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6 | # May you do good and not evil. |
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7 | # May you find forgiveness for yourself and forgive others. |
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8 | # May you share freely, never taking more than you give. |
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9 | # |
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10 | #*********************************************************************** |
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11 | # |
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12 | # This file is to test that ticket #2640 has been fixed. |
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13 | # |
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14 | # $Id: tkt2640.test,v 1.3 2008/08/04 03:51:24 danielk1977 Exp $ |
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15 | # |
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16 | |||
17 | # The problem in ticket #2640 was that the query optimizer was |
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18 | # not recognizing all uses of tables within subqueries in the |
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19 | # WHERE clause. If the subquery contained a compound SELECT, |
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20 | # then tables that were used by terms of the compound other than |
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21 | # the last term would not be recognized as dependencies. |
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22 | # So if one of the SELECT statements within a compound made |
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23 | # use of a table that occurs later in a join, the query |
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24 | # optimizer would not recognize this and would try to evaluate |
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25 | # the subquery too early, before that tables value had been |
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26 | # established. |
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27 | |||
28 | set testdir [file dirname $argv0] |
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29 | source $testdir/tester.tcl |
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30 | |||
31 | ifcapable !subquery||!compound { |
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32 | finish_test |
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33 | return |
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34 | } |
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35 | |||
36 | do_test tkt2640-1.1 { |
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37 | execsql { |
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38 | CREATE TABLE persons(person_id, name); |
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39 | INSERT INTO persons VALUES(1,'fred'); |
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40 | INSERT INTO persons VALUES(2,'barney'); |
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41 | INSERT INTO persons VALUES(3,'wilma'); |
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42 | INSERT INTO persons VALUES(4,'pebbles'); |
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43 | INSERT INTO persons VALUES(5,'bambam'); |
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44 | CREATE TABLE directors(person_id); |
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45 | INSERT INTO directors VALUES(5); |
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46 | INSERT INTO directors VALUES(3); |
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47 | CREATE TABLE writers(person_id); |
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48 | INSERT INTO writers VALUES(2); |
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49 | INSERT INTO writers VALUES(3); |
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50 | INSERT INTO writers VALUES(4); |
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51 | SELECT DISTINCT p.name |
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52 | FROM persons p, directors d |
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53 | WHERE d.person_id=p.person_id |
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54 | AND NOT EXISTS ( |
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55 | SELECT person_id FROM directors d1 WHERE d1.person_id=p.person_id |
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56 | EXCEPT |
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57 | SELECT person_id FROM writers w |
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58 | ); |
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59 | } |
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60 | } {wilma} |
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61 | do_test tkt2640-1.2 { |
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62 | execsql { |
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63 | SELECT DISTINCT p.name |
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64 | FROM persons p CROSS JOIN directors d |
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65 | WHERE d.person_id=p.person_id |
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66 | AND NOT EXISTS ( |
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67 | SELECT person_id FROM directors d1 WHERE d1.person_id=p.person_id |
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68 | EXCEPT |
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69 | SELECT person_id FROM writers w |
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70 | ); |
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71 | } |
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72 | } {wilma} |
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73 | do_test tkt2640-1.3 { |
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74 | execsql { |
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75 | SELECT DISTINCT p.name |
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76 | FROM directors d CROSS JOIN persons p |
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77 | WHERE d.person_id=p.person_id |
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78 | AND NOT EXISTS ( |
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79 | SELECT person_id FROM directors d1 WHERE d1.person_id=p.person_id |
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80 | EXCEPT |
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81 | SELECT person_id FROM writers w |
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82 | ); |
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83 | } |
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84 | } {wilma} |
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85 | do_test tkt2640-1.4 { |
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86 | execsql { |
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87 | SELECT DISTINCT p.name |
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88 | FROM persons p, directors d |
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89 | WHERE d.person_id=p.person_id |
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90 | AND NOT EXISTS ( |
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91 | SELECT person_id FROM directors d1 WHERE d1.person_id=d.person_id |
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92 | EXCEPT |
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93 | SELECT person_id FROM writers w |
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94 | ); |
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95 | } |
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96 | } {wilma} |
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97 | do_test tkt2640-1.5 { |
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98 | execsql { |
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99 | SELECT DISTINCT p.name |
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100 | FROM persons p CROSS JOIN directors d |
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101 | WHERE d.person_id=p.person_id |
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102 | AND NOT EXISTS ( |
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103 | SELECT person_id FROM directors d1 WHERE d1.person_id=d.person_id |
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104 | EXCEPT |
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105 | SELECT person_id FROM writers w |
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106 | ); |
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107 | } |
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108 | } {wilma} |
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109 | do_test tkt2640-1.6 { |
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110 | execsql { |
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111 | SELECT DISTINCT p.name |
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112 | FROM directors d CROSS JOIN persons p |
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113 | WHERE d.person_id=p.person_id |
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114 | AND NOT EXISTS ( |
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115 | SELECT person_id FROM directors d1 WHERE d1.person_id=d.person_id |
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116 | EXCEPT |
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117 | SELECT person_id FROM writers w |
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118 | ); |
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119 | } |
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120 | } {wilma} |
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121 | |||
122 | |||
123 | |||
124 | finish_test |