wasCSharpSQLite – Blame information for rev 7
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1 | office | 1 | # 2001 September 15 |
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 | # This file implements regression tests for SQLite library. |
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12 | # |
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13 | # This file implements tests for proper treatment of the special |
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14 | # value NULL. |
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15 | # |
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16 | |||
17 | set testdir [file dirname $argv0] |
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18 | source $testdir/tester.tcl |
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19 | |||
20 | # Create a table and some data to work with. |
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21 | # |
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22 | do_test null-1.0 { |
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23 | execsql { |
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24 | begin; |
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25 | create table t1(a,b,c); |
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26 | insert into t1 values(1,0,0); |
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27 | insert into t1 values(2,0,1); |
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28 | insert into t1 values(3,1,0); |
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29 | insert into t1 values(4,1,1); |
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30 | insert into t1 values(5,null,0); |
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31 | insert into t1 values(6,null,1); |
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32 | insert into t1 values(7,null,null); |
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33 | commit; |
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34 | select * from t1; |
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35 | } |
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36 | } {1 0 0 2 0 1 3 1 0 4 1 1 5 {} 0 6 {} 1 7 {} {}} |
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37 | |||
38 | # Check for how arithmetic expressions handle NULL |
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39 | # |
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40 | do_test null-1.1 { |
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41 | execsql { |
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42 | select ifnull(a+b,99) from t1; |
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43 | } |
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44 | } {1 2 4 5 99 99 99} |
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45 | do_test null-1.2 { |
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46 | execsql { |
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47 | select ifnull(b*c,99) from t1; |
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48 | } |
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49 | } {0 0 0 1 99 99 99} |
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50 | |||
51 | # Check to see how the CASE expression handles NULL values. The |
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52 | # first WHEN for which the test expression is TRUE is selected. |
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53 | # FALSE and UNKNOWN test expressions are skipped. |
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54 | # |
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55 | do_test null-2.1 { |
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56 | execsql { |
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57 | select ifnull(case when b<>0 then 1 else 0 end, 99) from t1; |
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58 | } |
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59 | } {0 0 1 1 0 0 0} |
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60 | do_test null-2.2 { |
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61 | execsql { |
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62 | select ifnull(case when not b<>0 then 1 else 0 end, 99) from t1; |
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63 | } |
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64 | } {1 1 0 0 0 0 0} |
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65 | do_test null-2.3 { |
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66 | execsql { |
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67 | select ifnull(case when b<>0 and c<>0 then 1 else 0 end, 99) from t1; |
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68 | } |
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69 | } {0 0 0 1 0 0 0} |
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70 | do_test null-2.4 { |
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71 | execsql { |
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72 | select ifnull(case when not (b<>0 and c<>0) then 1 else 0 end, 99) from t1; |
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73 | } |
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74 | } {1 1 1 0 1 0 0} |
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75 | do_test null-2.5 { |
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76 | execsql { |
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77 | select ifnull(case when b<>0 or c<>0 then 1 else 0 end, 99) from t1; |
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78 | } |
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79 | } {0 1 1 1 0 1 0} |
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80 | do_test null-2.6 { |
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81 | execsql { |
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82 | select ifnull(case when not (b<>0 or c<>0) then 1 else 0 end, 99) from t1; |
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83 | } |
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84 | } {1 0 0 0 0 0 0} |
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85 | do_test null-2.7 { |
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86 | execsql { |
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87 | select ifnull(case b when c then 1 else 0 end, 99) from t1; |
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88 | } |
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89 | } {1 0 0 1 0 0 0} |
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90 | do_test null-2.8 { |
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91 | execsql { |
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92 | select ifnull(case c when b then 1 else 0 end, 99) from t1; |
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93 | } |
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94 | } {1 0 0 1 0 0 0} |
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95 | |||
96 | # Check to see that NULL values are ignored in aggregate functions. |
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97 | # |
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98 | do_test null-3.1 { |
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99 | execsql { |
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100 | 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 | |||
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 | |||
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 | |||
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 | |||
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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162 | do_test null-6.1 { |
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163 | execsql { |
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164 | select b from t1 union select c from t1 order by b; |
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165 | } |
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166 | } {{} 0 1} |
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167 | do_test null-6.2 { |
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168 | execsql { |
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169 | select b from t1 union select c from t1 order by 1; |
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170 | } |
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171 | } {{} 0 1} |
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172 | do_test null-6.3 { |
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173 | execsql { |
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174 | select b from t1 union select c from t1 order by t1.b; |
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175 | } |
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176 | } {{} 0 1} |
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177 | do_test null-6.4 { |
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178 | execsql { |
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179 | select b from t1 union select c from t1 order by main.t1.b; |
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180 | } |
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181 | } {{} 0 1} |
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182 | do_test null-6.5 { |
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183 | catchsql { |
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184 | select b from t1 union select c from t1 order by t1.a; |
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185 | } |
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186 | } {1 {1st ORDER BY term does not match any column in the result set}} |
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187 | do_test null-6.6 { |
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188 | catchsql { |
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189 | select b from t1 union select c from t1 order by main.t1.a; |
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190 | } |
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191 | } {1 {1st ORDER BY term does not match any column in the result set}} |
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192 | } ;# ifcapable compound |
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193 | |||
194 | # The UNIQUE constraint only applies to non-null values |
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195 | # |
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196 | ifcapable conflict { |
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197 | do_test null-7.1 { |
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198 | execsql { |
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199 | create table t2(a, b unique on conflict ignore); |
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200 | insert into t2 values(1,1); |
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201 | insert into t2 values(2,null); |
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202 | insert into t2 values(3,null); |
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203 | insert into t2 values(4,1); |
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204 | select a from t2; |
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205 | } |
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206 | } {1 2 3} |
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207 | do_test null-7.2 { |
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208 | execsql { |
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209 | create table t3(a, b, c, unique(b,c) on conflict ignore); |
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210 | insert into t3 values(1,1,1); |
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211 | insert into t3 values(2,null,1); |
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212 | insert into t3 values(3,null,1); |
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213 | insert into t3 values(4,1,1); |
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214 | select a from t3; |
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215 | } |
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216 | } {1 2 3} |
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217 | } |
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218 | |||
219 | # Ticket #461 - Make sure nulls are handled correctly when doing a |
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220 | # lookup using an index. |
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221 | # |
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222 | do_test null-8.1 { |
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223 | execsql { |
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224 | CREATE TABLE t4(x,y); |
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225 | INSERT INTO t4 VALUES(1,11); |
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226 | INSERT INTO t4 VALUES(2,NULL); |
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227 | SELECT x FROM t4 WHERE y=NULL; |
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228 | } |
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229 | } {} |
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230 | ifcapable subquery { |
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231 | do_test null-8.2 { |
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232 | execsql { |
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233 | SELECT x FROM t4 WHERE y IN (33,NULL); |
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234 | } |
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235 | } {} |
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236 | } |
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237 | do_test null-8.3 { |
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238 | execsql { |
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239 | SELECT x FROM t4 WHERE y<33 ORDER BY x; |
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240 | } |
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241 | } {1} |
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242 | do_test null-8.4 { |
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243 | execsql { |
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244 | SELECT x FROM t4 WHERE y>6 ORDER BY x; |
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245 | } |
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246 | } {1} |
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247 | do_test null-8.5 { |
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248 | execsql { |
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249 | SELECT x FROM t4 WHERE y!=33 ORDER BY x; |
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250 | } |
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251 | } {1} |
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252 | do_test null-8.11 { |
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253 | execsql { |
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254 | CREATE INDEX t4i1 ON t4(y); |
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255 | SELECT x FROM t4 WHERE y=NULL; |
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256 | } |
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257 | } {} |
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258 | ifcapable subquery { |
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259 | do_test null-8.12 { |
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260 | execsql { |
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261 | SELECT x FROM t4 WHERE y IN (33,NULL); |
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262 | } |
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263 | } {} |
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264 | } |
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265 | do_test null-8.13 { |
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266 | execsql { |
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267 | SELECT x FROM t4 WHERE y<33 ORDER BY x; |
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268 | } |
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269 | } {1} |
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270 | do_test null-8.14 { |
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271 | execsql { |
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272 | SELECT x FROM t4 WHERE y>6 ORDER BY x; |
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273 | } |
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274 | } {1} |
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275 | do_test null-8.15 { |
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276 | execsql { |
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277 | SELECT x FROM t4 WHERE y!=33 ORDER BY x; |
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278 | } |
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279 | } {1} |
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280 | |||
281 | |||
282 | |||
283 | finish_test |