author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 17 Sep 2010 08:39:56 +0300 | |
changeset 49 | 7521e5afd3df |
parent 0 | 08ec8eefde2f |
permissions | -rw-r--r-- |
0
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# 2001 September 15 |
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# |
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# The author disclaims copyright to this source code. In place of |
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# a legal notice, here is a blessing: |
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# |
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# May you do good and not evil. |
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# May you find forgiveness for yourself and forgive others. |
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# May you share freely, never taking more than you give. |
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# |
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#*********************************************************************** |
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# This file implements regression tests for SQLite library. |
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# |
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# This file implements tests for proper treatment of the special |
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# value NULL. |
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# |
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|
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set testdir [file dirname $argv0] |
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source $testdir/tester.tcl |
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|
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# Create a table and some data to work with. |
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# |
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do_test null-1.0 { |
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execsql { |
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begin; |
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create table t1(a,b,c); |
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insert into t1 values(1,0,0); |
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insert into t1 values(2,0,1); |
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insert into t1 values(3,1,0); |
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insert into t1 values(4,1,1); |
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insert into t1 values(5,null,0); |
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insert into t1 values(6,null,1); |
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insert into t1 values(7,null,null); |
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commit; |
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select * from t1; |
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} |
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} {1 0 0 2 0 1 3 1 0 4 1 1 5 {} 0 6 {} 1 7 {} {}} |
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|
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# Check for how arithmetic expressions handle NULL |
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# |
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do_test null-1.1 { |
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execsql { |
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select ifnull(a+b,99) from t1; |
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} |
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} {1 2 4 5 99 99 99} |
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do_test null-1.2 { |
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execsql { |
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select ifnull(b*c,99) from t1; |
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} |
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} {0 0 0 1 99 99 99} |
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|
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# Check to see how the CASE expression handles NULL values. The |
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# first WHEN for which the test expression is TRUE is selected. |
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# FALSE and UNKNOWN test expressions are skipped. |
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# |
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do_test null-2.1 { |
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execsql { |
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select ifnull(case when b<>0 then 1 else 0 end, 99) from t1; |
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} |
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} {0 0 1 1 0 0 0} |
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do_test null-2.2 { |
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execsql { |
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select ifnull(case when not b<>0 then 1 else 0 end, 99) from t1; |
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} |
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} {1 1 0 0 0 0 0} |
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do_test null-2.3 { |
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execsql { |
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select ifnull(case when b<>0 and c<>0 then 1 else 0 end, 99) from t1; |
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} |
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} {0 0 0 1 0 0 0} |
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do_test null-2.4 { |
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execsql { |
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select ifnull(case when not (b<>0 and c<>0) then 1 else 0 end, 99) from t1; |
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} |
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} {1 1 1 0 1 0 0} |
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do_test null-2.5 { |
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execsql { |
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select ifnull(case when b<>0 or c<>0 then 1 else 0 end, 99) from t1; |
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} |
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} {0 1 1 1 0 1 0} |
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do_test null-2.6 { |
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execsql { |
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select ifnull(case when not (b<>0 or c<>0) then 1 else 0 end, 99) from t1; |
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} |
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} {1 0 0 0 0 0 0} |
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do_test null-2.7 { |
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execsql { |
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select ifnull(case b when c then 1 else 0 end, 99) from t1; |
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88 |
} |
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} {1 0 0 1 0 0 0} |
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do_test null-2.8 { |
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execsql { |
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select ifnull(case c when b then 1 else 0 end, 99) from t1; |
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} |
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} {1 0 0 1 0 0 0} |
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95 |
|
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# Check to see that NULL values are ignored in aggregate functions. |
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97 |
# |
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do_test null-3.1 { |
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99 |
execsql { |
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select count(*), count(b), count(c), sum(b), sum(c), |
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101 |
avg(b), avg(c), min(b), max(b) from t1; |
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102 |
} |
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|
103 |
} {7 4 6 2 3 0.5 0.5 0 1} |
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|
104 |
|
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|
105 |
# The sum of zero entries is a NULL, but the total of zero entries is 0. |
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106 |
# |
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|
107 |
do_test null-3.2 { |
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108 |
execsql { |
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109 |
SELECT sum(b), total(b) FROM t1 WHERE b<0 |
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110 |
} |
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111 |
} {{} 0.0} |
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112 |
|
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113 |
# Check to see how WHERE clauses handle NULL values. A NULL value |
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114 |
# is the same as UNKNOWN. The WHERE clause should only select those |
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115 |
# rows that are TRUE. FALSE and UNKNOWN rows are rejected. |
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116 |
# |
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117 |
do_test null-4.1 { |
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118 |
execsql { |
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119 |
select a from t1 where b<10 |
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120 |
} |
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121 |
} {1 2 3 4} |
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122 |
do_test null-4.2 { |
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123 |
execsql { |
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124 |
select a from t1 where not b>10 |
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125 |
} |
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126 |
} {1 2 3 4} |
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127 |
do_test null-4.3 { |
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128 |
execsql { |
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129 |
select a from t1 where b<10 or c=1; |
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130 |
} |
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131 |
} {1 2 3 4 6} |
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132 |
do_test null-4.4 { |
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133 |
execsql { |
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134 |
select a from t1 where b<10 and c=1; |
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135 |
} |
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136 |
} {2 4} |
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137 |
do_test null-4.5 { |
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138 |
execsql { |
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139 |
select a from t1 where not (b<10 and c=1); |
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140 |
} |
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141 |
} {1 3 5} |
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142 |
|
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143 |
# The DISTINCT keyword on a SELECT statement should treat NULL values |
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144 |
# as distinct |
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145 |
# |
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146 |
do_test null-5.1 { |
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147 |
execsql { |
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148 |
select distinct b from t1 order by b; |
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149 |
} |
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150 |
} {{} 0 1} |
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|
151 |
|
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152 |
# A UNION to two queries should treat NULL values |
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153 |
# as distinct. |
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154 |
# |
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155 |
# (Later:) We also take this opportunity to test the ability |
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156 |
# of an ORDER BY clause to bind to either SELECT of a UNION. |
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157 |
# The left-most SELECT is preferred. In standard SQL, only |
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158 |
# the left SELECT can be used. The ability to match an ORDER |
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159 |
# BY term to the right SELECT is an SQLite extension. |
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160 |
# |
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|
161 |
ifcapable compound { |
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Revision: 201003
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|
162 |
do_test null-6.1 { |
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163 |
execsql { |
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Revision: 201003
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|
164 |
select b from t1 union select c from t1 order by b; |
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Revision: 201003
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|
165 |
} |
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Revision: 201003
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|
166 |
} {{} 0 1} |
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Revision: 201003
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|
167 |
do_test null-6.2 { |
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Revision: 201003
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|
168 |
execsql { |
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Revision: 201003
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|
169 |
select b from t1 union select c from t1 order by 1; |
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Revision: 201003
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|
170 |
} |
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Revision: 201003
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|
171 |
} {{} 0 1} |
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Revision: 201003
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|
172 |
do_test null-6.3 { |
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Revision: 201003
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|
173 |
execsql { |
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Revision: 201003
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|
174 |
select b from t1 union select c from t1 order by t1.b; |
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Revision: 201003
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|
175 |
} |
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Revision: 201003
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|
176 |
} {{} 0 1} |
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Revision: 201003
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|
177 |
do_test null-6.4 { |
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Revision: 201003
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|
178 |
execsql { |
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Revision: 201003
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|
179 |
select b from t1 union select c from t1 order by main.t1.b; |
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Revision: 201003
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|
180 |
} |
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Revision: 201003
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|
181 |
} {{} 0 1} |
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Revision: 201003
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|
182 |
do_test null-6.5 { |
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Revision: 201003
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|
183 |
catchsql { |
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Revision: 201003
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|
184 |
select b from t1 union select c from t1 order by t1.a; |
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Revision: 201003
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|
185 |
} |
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Revision: 201003
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|
186 |
} {1 {1st ORDER BY term does not match any column in the result set}} |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
187 |
do_test null-6.6 { |
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Revision: 201003
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parents:
diff
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|
188 |
catchsql { |
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Revision: 201003
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|
189 |
select b from t1 union select c from t1 order by main.t1.a; |
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Revision: 201003
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parents:
diff
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|
190 |
} |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
191 |
} {1 {1st ORDER BY term does not match any column in the result set}} |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
192 |
} ;# ifcapable compound |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
193 |
|
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Revision: 201003
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parents:
diff
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|
194 |
# The UNIQUE constraint only applies to non-null values |
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Revision: 201003
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|
195 |
# |
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Revision: 201003
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diff
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|
196 |
ifcapable conflict { |
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Revision: 201003
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parents:
diff
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|
197 |
do_test null-7.1 { |
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Revision: 201003
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parents:
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|
198 |
execsql { |
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Revision: 201003
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parents:
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|
199 |
create table t2(a, b unique on conflict ignore); |
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Revision: 201003
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diff
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|
200 |
insert into t2 values(1,1); |
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Revision: 201003
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parents:
diff
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|
201 |
insert into t2 values(2,null); |
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Revision: 201003
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parents:
diff
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|
202 |
insert into t2 values(3,null); |
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Revision: 201003
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parents:
diff
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|
203 |
insert into t2 values(4,1); |
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Revision: 201003
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parents:
diff
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|
204 |
select a from t2; |
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Revision: 201003
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parents:
diff
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|
205 |
} |
08ec8eefde2f
Revision: 201003
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parents:
diff
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|
206 |
} {1 2 3} |
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do_test null-7.2 { |
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execsql { |
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create table t3(a, b, c, unique(b,c) on conflict ignore); |
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insert into t3 values(1,1,1); |
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insert into t3 values(2,null,1); |
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insert into t3 values(3,null,1); |
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insert into t3 values(4,1,1); |
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select a from t3; |
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} |
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} {1 2 3} |
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} |
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|
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# Ticket #461 - Make sure nulls are handled correctly when doing a |
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# lookup using an index. |
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# |
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do_test null-8.1 { |
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execsql { |
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CREATE TABLE t4(x,y); |
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INSERT INTO t4 VALUES(1,11); |
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INSERT INTO t4 VALUES(2,NULL); |
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SELECT x FROM t4 WHERE y=NULL; |
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} |
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} {} |
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ifcapable subquery { |
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do_test null-8.2 { |
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execsql { |
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SELECT x FROM t4 WHERE y IN (33,NULL); |
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} |
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} {} |
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} |
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do_test null-8.3 { |
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execsql { |
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SELECT x FROM t4 WHERE y<33 ORDER BY x; |
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} |
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} {1} |
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do_test null-8.4 { |
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execsql { |
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SELECT x FROM t4 WHERE y>6 ORDER BY x; |
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} |
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} {1} |
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do_test null-8.5 { |
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execsql { |
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SELECT x FROM t4 WHERE y!=33 ORDER BY x; |
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} |
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} {1} |
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do_test null-8.11 { |
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execsql { |
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CREATE INDEX t4i1 ON t4(y); |
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SELECT x FROM t4 WHERE y=NULL; |
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} |
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} {} |
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ifcapable subquery { |
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do_test null-8.12 { |
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execsql { |
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SELECT x FROM t4 WHERE y IN (33,NULL); |
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} |
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} {} |
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} |
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do_test null-8.13 { |
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execsql { |
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SELECT x FROM t4 WHERE y<33 ORDER BY x; |
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} |
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} {1} |
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do_test null-8.14 { |
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execsql { |
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SELECT x FROM t4 WHERE y>6 ORDER BY x; |
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} |
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} {1} |
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do_test null-8.15 { |
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execsql { |
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SELECT x FROM t4 WHERE y!=33 ORDER BY x; |
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} |
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} {1} |
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|
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|
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|
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finish_test |