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. The |
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12 | # focus of this file is testing SELECT statements that are part of |
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13 | # expressions. |
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14 | # |
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15 | # $Id: subselect.test,v 1.16 2008/08/04 03:51:24 danielk1977 Exp $ |
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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 | # Omit this whole file if the library is build without subquery support. |
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21 | ifcapable !subquery { |
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22 | finish_test |
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23 | return |
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24 | } |
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25 | |||
26 | # Basic sanity checking. Try a simple subselect. |
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27 | # |
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28 | do_test subselect-1.1 { |
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29 | execsql { |
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30 | CREATE TABLE t1(a int, b int); |
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31 | INSERT INTO t1 VALUES(1,2); |
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32 | INSERT INTO t1 VALUES(3,4); |
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33 | INSERT INTO t1 VALUES(5,6); |
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34 | } |
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35 | execsql {SELECT * FROM t1 WHERE a = (SELECT count(*) FROM t1)} |
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36 | } {3 4} |
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37 | |||
38 | # Try a select with more than one result column. |
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39 | # |
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40 | do_test subselect-1.2 { |
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41 | set v [catch {execsql {SELECT * FROM t1 WHERE a = (SELECT * FROM t1)}} msg] |
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42 | lappend v $msg |
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43 | } {1 {only a single result allowed for a SELECT that is part of an expression}} |
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44 | |||
45 | # A subselect without an aggregate. |
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46 | # |
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47 | do_test subselect-1.3a { |
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48 | execsql {SELECT b from t1 where a = (SELECT a FROM t1 WHERE b=2)} |
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49 | } {2} |
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50 | do_test subselect-1.3b { |
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51 | execsql {SELECT b from t1 where a = (SELECT a FROM t1 WHERE b=4)} |
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52 | } {4} |
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53 | do_test subselect-1.3c { |
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54 | execsql {SELECT b from t1 where a = (SELECT a FROM t1 WHERE b=6)} |
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55 | } {6} |
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56 | do_test subselect-1.3d { |
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57 | execsql {SELECT b from t1 where a = (SELECT a FROM t1 WHERE b=8)} |
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58 | } {} |
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59 | ifcapable compound { |
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60 | do_test subselect-1.3e { |
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61 | execsql { |
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62 | SELECT b FROM t1 |
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63 | WHERE a = (SELECT a FROM t1 UNION SELECT b FROM t1 ORDER BY 1); |
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64 | } |
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65 | } {2} |
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66 | } |
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67 | |||
68 | # What if the subselect doesn't return any value. We should get |
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69 | # NULL as the result. Check it out. |
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70 | # |
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71 | do_test subselect-1.4 { |
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72 | execsql {SELECT b from t1 where a = coalesce((SELECT a FROM t1 WHERE b=5),1)} |
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73 | } {2} |
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74 | |||
75 | # Try multiple subselects within a single expression. |
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76 | # |
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77 | do_test subselect-1.5 { |
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78 | execsql { |
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79 | CREATE TABLE t2(x int, y int); |
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80 | INSERT INTO t2 VALUES(1,2); |
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81 | INSERT INTO t2 VALUES(2,4); |
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82 | INSERT INTO t2 VALUES(3,8); |
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83 | INSERT INTO t2 VALUES(4,16); |
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84 | } |
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85 | execsql { |
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86 | SELECT y from t2 |
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87 | WHERE x = (SELECT sum(b) FROM t1 where a notnull) - (SELECT sum(a) FROM t1) |
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88 | } |
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89 | } {8} |
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90 | |||
91 | # Try something useful. Delete every entry from t2 where the |
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92 | # x value is less than half of the maximum. |
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93 | # |
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94 | do_test subselect-1.6 { |
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95 | execsql {DELETE FROM t2 WHERE x < 0.5*(SELECT max(x) FROM t2)} |
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96 | execsql {SELECT x FROM t2 ORDER BY x} |
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97 | } {2 3 4} |
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98 | |||
99 | # Make sure sorting works for SELECTs there used as a scalar expression. |
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100 | # |
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101 | do_test subselect-2.1 { |
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102 | execsql { |
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103 | SELECT (SELECT a FROM t1 ORDER BY a), (SELECT a FROM t1 ORDER BY a DESC) |
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104 | } |
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105 | } {1 5} |
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106 | do_test subselect-2.2 { |
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107 | execsql { |
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108 | SELECT 1 IN (SELECT a FROM t1 ORDER BY a); |
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109 | } |
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110 | } {1} |
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111 | do_test subselect-2.3 { |
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112 | execsql { |
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113 | SELECT 2 IN (SELECT a FROM t1 ORDER BY a DESC); |
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114 | } |
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115 | } {0} |
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116 | |||
117 | # Verify that the ORDER BY clause is honored in a subquery. |
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118 | # |
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119 | ifcapable compound { |
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120 | do_test subselect-3.1 { |
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121 | execsql { |
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122 | CREATE TABLE t3(x int); |
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123 | INSERT INTO t3 SELECT a FROM t1 UNION ALL SELECT b FROM t1; |
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124 | SELECT * FROM t3 ORDER BY x; |
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125 | } |
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126 | } {1 2 3 4 5 6} |
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127 | } ;# ifcapable compound |
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128 | ifcapable !compound { |
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129 | do_test subselect-3.1 { |
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130 | execsql { |
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131 | CREATE TABLE t3(x int); |
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132 | INSERT INTO t3 SELECT a FROM t1; |
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133 | INSERT INTO t3 SELECT b FROM t1; |
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134 | SELECT * FROM t3 ORDER BY x; |
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135 | } |
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136 | } {1 2 3 4 5 6} |
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137 | } ;# ifcapable !compound |
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138 | |||
139 | do_test subselect-3.2 { |
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140 | execsql { |
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141 | SELECT sum(x) FROM (SELECT x FROM t3 ORDER BY x LIMIT 2); |
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142 | } |
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143 | } {3} |
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144 | do_test subselect-3.3 { |
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145 | execsql { |
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146 | SELECT sum(x) FROM (SELECT x FROM t3 ORDER BY x DESC LIMIT 2); |
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147 | } |
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148 | } {11} |
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149 | do_test subselect-3.4 { |
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150 | execsql { |
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151 | SELECT (SELECT x FROM t3 ORDER BY x); |
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152 | } |
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153 | } {1} |
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154 | do_test subselect-3.5 { |
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155 | execsql { |
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156 | SELECT (SELECT x FROM t3 ORDER BY x DESC); |
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157 | } |
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158 | } {6} |
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159 | do_test subselect-3.6 { |
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160 | execsql { |
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161 | SELECT (SELECT x FROM t3 ORDER BY x LIMIT 1); |
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162 | } |
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163 | } {1} |
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164 | do_test subselect-3.7 { |
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165 | execsql { |
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166 | SELECT (SELECT x FROM t3 ORDER BY x DESC LIMIT 1); |
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167 | } |
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168 | } {6} |
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169 | do_test subselect-3.8 { |
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170 | execsql { |
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171 | SELECT (SELECT x FROM t3 ORDER BY x LIMIT 1 OFFSET 2); |
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172 | } |
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173 | } {3} |
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174 | do_test subselect-3.9 { |
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175 | execsql { |
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176 | SELECT (SELECT x FROM t3 ORDER BY x DESC LIMIT 1 OFFSET 2); |
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177 | } |
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178 | } {4} |
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179 | do_test subselect-3.10 { |
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180 | execsql { |
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181 | SELECT x FROM t3 WHERE x IN |
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182 | (SELECT x FROM t3 ORDER BY x DESC LIMIT 1 OFFSET 2); |
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183 | } |
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184 | } {4} |
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185 | |||
186 | # Ticket #2295. |
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187 | # Make sure type affinities work correctly on subqueries with |
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188 | # an ORDER BY clause. |
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189 | # |
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190 | do_test subselect-4.1 { |
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191 | execsql { |
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192 | CREATE TABLE t4(a TEXT, b TEXT); |
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193 | INSERT INTO t4 VALUES('a','1'); |
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194 | INSERT INTO t4 VALUES('b','2'); |
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195 | INSERT INTO t4 VALUES('c','3'); |
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196 | SELECT a FROM t4 WHERE b IN (SELECT b FROM t4 ORDER BY b); |
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197 | } |
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198 | } {a b c} |
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199 | do_test subselect-4.2 { |
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200 | execsql { |
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201 | SELECT a FROM t4 WHERE b IN (SELECT b FROM t4 ORDER BY b LIMIT 1); |
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202 | } |
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203 | } {a} |
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204 | do_test subselect-4.3 { |
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205 | execsql { |
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206 | SELECT a FROM t4 WHERE b IN (SELECT b FROM t4 ORDER BY b DESC LIMIT 1); |
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207 | } |
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208 | } {c} |
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209 | |||
210 | finish_test |