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Rev | Author | Line No. | Line |
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1 | office | 1 | # 2008 June 24 |
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 | # $Id: select9.test,v 1.4 2008/07/01 14:39:35 danielk1977 Exp $ |
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14 | |||
15 | # The tests in this file are focused on test compound SELECT statements |
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16 | # that have any or all of an ORDER BY, LIMIT or OFFSET clauses. As of |
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17 | # version 3.6.0, SQLite contains code to use SQL indexes where possible |
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18 | # to optimize such statements. |
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19 | # |
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20 | |||
21 | # TODO Points: |
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22 | # |
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23 | # * Are there any "column affinity" issues to consider? |
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24 | |||
25 | set testdir [file dirname $argv0] |
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26 | source $testdir/tester.tcl |
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27 | |||
28 | #------------------------------------------------------------------------- |
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29 | # test_compound_select TESTNAME SELECT RESULT |
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30 | # |
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31 | # This command is used to run multiple LIMIT/OFFSET test cases based on |
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32 | # the single SELECT statement passed as the second argument. The SELECT |
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33 | # statement may not contain a LIMIT or OFFSET clause. This proc tests |
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34 | # many statements of the form: |
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35 | # |
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36 | # "$SELECT limit $X offset $Y" |
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37 | # |
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38 | # for various values of $X and $Y. |
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39 | # |
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40 | # The third argument, $RESULT, should contain the expected result of |
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41 | # the command [execsql $SELECT]. |
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42 | # |
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43 | # The first argument, $TESTNAME, is used as the base test case name to |
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44 | # pass to [do_test] for each individual LIMIT OFFSET test case. |
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45 | # |
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46 | proc test_compound_select {testname sql result} { |
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47 | |||
48 | set nCol 1 |
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49 | db eval $sql A { |
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50 | set nCol [llength $A(*)] |
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51 | break |
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52 | } |
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53 | set nRow [expr {[llength $result] / $nCol}] |
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54 | |||
55 | set ::compound_sql $sql |
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56 | do_test $testname { |
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57 | execsql $::compound_sql |
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58 | } $result |
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59 | #return |
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60 | |||
61 | set iLimitIncr 1 |
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62 | set iOffsetIncr 1 |
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63 | if {[info exists ::G(isquick)] && $::G(isquick) && $nRow>=5} { |
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64 | set iOffsetIncr [expr $nRow / 5] |
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65 | set iLimitIncr [expr $nRow / 5] |
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66 | } |
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67 | |||
68 | set iLimitEnd [expr $nRow+$iLimitIncr] |
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69 | set iOffsetEnd [expr $nRow+$iOffsetIncr] |
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70 | |||
71 | for {set iOffset 0} {$iOffset < $iOffsetEnd} {incr iOffset $iOffsetIncr} { |
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72 | for {set iLimit 0} {$iLimit < $iLimitEnd} {incr iLimit} { |
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73 | |||
74 | set ::compound_sql "$sql LIMIT $iLimit" |
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75 | if {$iOffset != 0} { |
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76 | append ::compound_sql " OFFSET $iOffset" |
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77 | } |
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78 | |||
79 | set iStart [expr {$iOffset*$nCol}] |
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80 | set iEnd [expr {($iOffset*$nCol) + ($iLimit*$nCol) -1}] |
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81 | |||
82 | do_test $testname.limit=$iLimit.offset=$iOffset { |
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83 | execsql $::compound_sql |
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84 | } [lrange $result $iStart $iEnd] |
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85 | } |
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86 | } |
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87 | } |
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88 | |||
89 | #------------------------------------------------------------------------- |
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90 | # test_compound_select_flippable TESTNAME SELECT RESULT |
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91 | # |
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92 | # This command is for testing statements of the form: |
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93 | # |
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94 | # <simple select 1> <compound op> <simple select 2> ORDER BY <order by> |
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95 | # |
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96 | # where each <simple select> is a simple (non-compound) select statement |
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97 | # and <compound op> is one of "INTERSECT", "UNION ALL" or "UNION". |
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98 | # |
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99 | # This proc calls [test_compound_select] twice, once with the select |
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100 | # statement as it is passed to this command, and once with the positions |
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101 | # of <select statement 1> and <select statement 2> exchanged. |
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102 | # |
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103 | proc test_compound_select_flippable {testname sql result} { |
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104 | test_compound_select $testname $sql $result |
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105 | |||
106 | set select [string trim $sql] |
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107 | set RE {(.*)(UNION ALL|INTERSECT|UNION)(.*)(ORDER BY.*)} |
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108 | set rc [regexp $RE $select -> s1 op s2 order_by] |
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109 | if {!$rc} {error "Statement is unflippable: $select"} |
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110 | |||
111 | set flipsql "$s2 $op $s1 $order_by" |
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112 | test_compound_select $testname.flipped $flipsql $result |
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113 | } |
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114 | |||
115 | ############################################################################# |
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116 | # Begin tests. |
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117 | # |
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118 | |||
119 | # Create and populate a sample database. |
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120 | # |
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121 | do_test select9-1.0 { |
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122 | execsql { |
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123 | CREATE TABLE t1(a, b, c); |
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124 | CREATE TABLE t2(d, e, f); |
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125 | BEGIN; |
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126 | INSERT INTO t1 VALUES(1, 'one', 'I'); |
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127 | INSERT INTO t1 VALUES(3, NULL, NULL); |
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128 | INSERT INTO t1 VALUES(5, 'five', 'V'); |
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129 | INSERT INTO t1 VALUES(7, 'seven', 'VII'); |
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130 | INSERT INTO t1 VALUES(9, NULL, NULL); |
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131 | INSERT INTO t1 VALUES(2, 'two', 'II'); |
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132 | INSERT INTO t1 VALUES(4, 'four', 'IV'); |
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133 | INSERT INTO t1 VALUES(6, NULL, NULL); |
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134 | INSERT INTO t1 VALUES(8, 'eight', 'VIII'); |
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135 | INSERT INTO t1 VALUES(10, 'ten', 'X'); |
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136 | |||
137 | INSERT INTO t2 VALUES(1, 'two', 'IV'); |
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138 | INSERT INTO t2 VALUES(2, 'four', 'VIII'); |
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139 | INSERT INTO t2 VALUES(3, NULL, NULL); |
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140 | INSERT INTO t2 VALUES(4, 'eight', 'XVI'); |
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141 | INSERT INTO t2 VALUES(5, 'ten', 'XX'); |
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142 | INSERT INTO t2 VALUES(6, NULL, NULL); |
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143 | INSERT INTO t2 VALUES(7, 'fourteen', 'XXVIII'); |
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144 | INSERT INTO t2 VALUES(8, 'sixteen', 'XXXII'); |
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145 | INSERT INTO t2 VALUES(9, NULL, NULL); |
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146 | INSERT INTO t2 VALUES(10, 'twenty', 'XL'); |
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147 | |||
148 | COMMIT; |
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149 | } |
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150 | } {} |
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151 | |||
152 | # Each iteration of this loop runs the same tests with a different set |
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153 | # of indexes present within the database schema. The data returned by |
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154 | # the compound SELECT statements in the test cases should be the same |
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155 | # in each case. |
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156 | # |
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157 | set iOuterLoop 1 |
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158 | foreach indexes [list { |
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159 | /* Do not create any indexes. */ |
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160 | } { |
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161 | CREATE INDEX i1 ON t1(a) |
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162 | } { |
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163 | CREATE INDEX i2 ON t1(b) |
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164 | } { |
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165 | CREATE INDEX i3 ON t2(d) |
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166 | } { |
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167 | CREATE INDEX i4 ON t2(e) |
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168 | }] { |
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169 | |||
170 | do_test select9-1.$iOuterLoop.1 { |
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171 | execsql $indexes |
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172 | } {} |
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173 | |||
174 | # Test some 2-way UNION ALL queries. No WHERE clauses. |
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175 | # |
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176 | test_compound_select select9-1.$iOuterLoop.2 { |
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177 | SELECT a, b FROM t1 UNION ALL SELECT d, e FROM t2 |
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178 | } {1 one 3 {} 5 five 7 seven 9 {} 2 two 4 four 6 {} 8 eight 10 ten 1 two 2 four 3 {} 4 eight 5 ten 6 {} 7 fourteen 8 sixteen 9 {} 10 twenty} |
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179 | test_compound_select select9-1.$iOuterLoop.3 { |
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180 | SELECT a, b FROM t1 UNION ALL SELECT d, e FROM t2 ORDER BY 1 |
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181 | } {1 one 1 two 2 two 2 four 3 {} 3 {} 4 four 4 eight 5 five 5 ten 6 {} 6 {} 7 seven 7 fourteen 8 eight 8 sixteen 9 {} 9 {} 10 ten 10 twenty} |
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182 | test_compound_select select9-1.$iOuterLoop.4 { |
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183 | SELECT a, b FROM t1 UNION ALL SELECT d, e FROM t2 ORDER BY 2 |
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184 | } {3 {} 9 {} 6 {} 3 {} 6 {} 9 {} 8 eight 4 eight 5 five 4 four 2 four 7 fourteen 1 one 7 seven 8 sixteen 10 ten 5 ten 10 twenty 2 two 1 two} |
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185 | test_compound_select_flippable select9-1.$iOuterLoop.5 { |
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186 | SELECT a, b FROM t1 UNION ALL SELECT d, e FROM t2 ORDER BY 1, 2 |
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187 | } {1 one 1 two 2 four 2 two 3 {} 3 {} 4 eight 4 four 5 five 5 ten 6 {} 6 {} 7 fourteen 7 seven 8 eight 8 sixteen 9 {} 9 {} 10 ten 10 twenty} |
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188 | test_compound_select_flippable select9-1.$iOuterLoop.6 { |
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189 | SELECT a, b FROM t1 UNION ALL SELECT d, e FROM t2 ORDER BY 2, 1 |
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190 | } {3 {} 3 {} 6 {} 6 {} 9 {} 9 {} 4 eight 8 eight 5 five 2 four 4 four 7 fourteen 1 one 7 seven 8 sixteen 5 ten 10 ten 10 twenty 1 two 2 two} |
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191 | |||
192 | # Test some 2-way UNION queries. |
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193 | # |
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194 | test_compound_select select9-1.$iOuterLoop.7 { |
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195 | SELECT a, b FROM t1 UNION SELECT d, e FROM t2 |
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196 | } {1 one 1 two 2 four 2 two 3 {} 4 eight 4 four 5 five 5 ten 6 {} 7 fourteen 7 seven 8 eight 8 sixteen 9 {} 10 ten 10 twenty} |
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197 | |||
198 | test_compound_select select9-1.$iOuterLoop.8 { |
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199 | SELECT a, b FROM t1 UNION SELECT d, e FROM t2 ORDER BY 1 |
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200 | } {1 one 1 two 2 four 2 two 3 {} 4 eight 4 four 5 five 5 ten 6 {} 7 fourteen 7 seven 8 eight 8 sixteen 9 {} 10 ten 10 twenty} |
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201 | |||
202 | test_compound_select select9-1.$iOuterLoop.9 { |
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203 | SELECT a, b FROM t1 UNION SELECT d, e FROM t2 ORDER BY 2 |
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204 | } {3 {} 6 {} 9 {} 4 eight 8 eight 5 five 2 four 4 four 7 fourteen 1 one 7 seven 8 sixteen 5 ten 10 ten 10 twenty 1 two 2 two} |
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205 | |||
206 | test_compound_select_flippable select9-1.$iOuterLoop.10 { |
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207 | SELECT a, b FROM t1 UNION SELECT d, e FROM t2 ORDER BY 1, 2 |
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208 | } {1 one 1 two 2 four 2 two 3 {} 4 eight 4 four 5 five 5 ten 6 {} 7 fourteen 7 seven 8 eight 8 sixteen 9 {} 10 ten 10 twenty} |
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209 | |||
210 | test_compound_select_flippable select9-1.$iOuterLoop.11 { |
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211 | SELECT a, b FROM t1 UNION SELECT d, e FROM t2 ORDER BY 2, 1 |
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212 | } {3 {} 6 {} 9 {} 4 eight 8 eight 5 five 2 four 4 four 7 fourteen 1 one 7 seven 8 sixteen 5 ten 10 ten 10 twenty 1 two 2 two} |
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213 | |||
214 | # Test some 2-way INTERSECT queries. |
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215 | # |
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216 | test_compound_select select9-1.$iOuterLoop.11 { |
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217 | SELECT a, b FROM t1 INTERSECT SELECT d, e FROM t2 |
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218 | } {3 {} 6 {} 9 {}} |
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219 | test_compound_select_flippable select9-1.$iOuterLoop.12 { |
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220 | SELECT a, b FROM t1 INTERSECT SELECT d, e FROM t2 ORDER BY 1 |
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221 | } {3 {} 6 {} 9 {}} |
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222 | test_compound_select select9-1.$iOuterLoop.13 { |
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223 | SELECT a, b FROM t1 INTERSECT SELECT d, e FROM t2 ORDER BY 2 |
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224 | } {3 {} 6 {} 9 {}} |
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225 | test_compound_select_flippable select9-1.$iOuterLoop.14 { |
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226 | SELECT a, b FROM t1 INTERSECT SELECT d, e FROM t2 ORDER BY 2, 1 |
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227 | } {3 {} 6 {} 9 {}} |
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228 | test_compound_select_flippable select9-1.$iOuterLoop.15 { |
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229 | SELECT a, b FROM t1 INTERSECT SELECT d, e FROM t2 ORDER BY 1, 2 |
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230 | } {3 {} 6 {} 9 {}} |
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231 | |||
232 | # Test some 2-way EXCEPT queries. |
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233 | # |
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234 | test_compound_select select9-1.$iOuterLoop.16 { |
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235 | SELECT a, b FROM t1 EXCEPT SELECT d, e FROM t2 |
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236 | } {1 one 2 two 4 four 5 five 7 seven 8 eight 10 ten} |
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237 | |||
238 | test_compound_select select9-1.$iOuterLoop.17 { |
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239 | SELECT a, b FROM t1 EXCEPT SELECT d, e FROM t2 ORDER BY 1 |
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240 | } {1 one 2 two 4 four 5 five 7 seven 8 eight 10 ten} |
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241 | |||
242 | test_compound_select select9-1.$iOuterLoop.18 { |
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243 | SELECT a, b FROM t1 EXCEPT SELECT d, e FROM t2 ORDER BY 2 |
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244 | } {8 eight 5 five 4 four 1 one 7 seven 10 ten 2 two} |
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245 | |||
246 | test_compound_select select9-1.$iOuterLoop.19 { |
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247 | SELECT a, b FROM t1 EXCEPT SELECT d, e FROM t2 ORDER BY 1, 2 |
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248 | } {1 one 2 two 4 four 5 five 7 seven 8 eight 10 ten} |
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249 | |||
250 | test_compound_select select9-1.$iOuterLoop.20 { |
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251 | SELECT a, b FROM t1 EXCEPT SELECT d, e FROM t2 ORDER BY 2, 1 |
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252 | } {8 eight 5 five 4 four 1 one 7 seven 10 ten 2 two} |
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253 | |||
254 | incr iOuterLoop |
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255 | } |
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256 | |||
257 | do_test select9-2.0 { |
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258 | execsql { |
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259 | DROP INDEX i1; |
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260 | DROP INDEX i2; |
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261 | DROP INDEX i3; |
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262 | DROP INDEX i4; |
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263 | } |
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264 | } {} |
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265 | |||
266 | proc reverse {lhs rhs} { |
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267 | return [string compare $rhs $lhs] |
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268 | } |
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269 | db collate reverse reverse |
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270 | |||
271 | # This loop is similar to the previous one (test cases select9-1.*) |
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272 | # except that the simple select statements have WHERE clauses attached |
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273 | # to them. Sometimes the WHERE clause may be satisfied using the same |
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274 | # index used for ORDER BY, sometimes not. |
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275 | # |
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276 | set iOuterLoop 1 |
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277 | foreach indexes [list { |
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278 | /* Do not create any indexes. */ |
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279 | } { |
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280 | CREATE INDEX i1 ON t1(a) |
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281 | } { |
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282 | DROP INDEX i1; |
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283 | CREATE INDEX i1 ON t1(b, a) |
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284 | } { |
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285 | CREATE INDEX i2 ON t2(d DESC, e COLLATE REVERSE ASC); |
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286 | } { |
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287 | CREATE INDEX i3 ON t1(a DESC); |
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288 | }] { |
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289 | do_test select9-2.$iOuterLoop.1 { |
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290 | execsql $indexes |
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291 | } {} |
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292 | |||
293 | test_compound_select_flippable select9-2.$iOuterLoop.2 { |
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294 | SELECT * FROM t1 WHERE a<5 UNION SELECT * FROM t2 WHERE d>=5 ORDER BY 1 |
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295 | } {1 one I 2 two II 3 {} {} 4 four IV 5 ten XX 6 {} {} 7 fourteen XXVIII 8 sixteen XXXII 9 {} {} 10 twenty XL} |
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296 | |||
297 | test_compound_select_flippable select9-2.$iOuterLoop.2 { |
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298 | SELECT * FROM t1 WHERE a<5 UNION SELECT * FROM t2 WHERE d>=5 ORDER BY 2, 1 |
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299 | } {3 {} {} 6 {} {} 9 {} {} 4 four IV 7 fourteen XXVIII 1 one I 8 sixteen XXXII 5 ten XX 10 twenty XL 2 two II} |
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300 | |||
301 | test_compound_select_flippable select9-2.$iOuterLoop.3 { |
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302 | SELECT * FROM t1 WHERE a<5 UNION SELECT * FROM t2 WHERE d>=5 |
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303 | ORDER BY 2 COLLATE reverse, 1 |
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304 | } {3 {} {} 6 {} {} 9 {} {} 2 two II 10 twenty XL 5 ten XX 8 sixteen XXXII 1 one I 7 fourteen XXVIII 4 four IV} |
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305 | |||
306 | test_compound_select_flippable select9-2.$iOuterLoop.4 { |
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307 | SELECT * FROM t1 WHERE a<5 UNION ALL SELECT * FROM t2 WHERE d>=5 ORDER BY 1 |
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308 | } {1 one I 2 two II 3 {} {} 4 four IV 5 ten XX 6 {} {} 7 fourteen XXVIII 8 sixteen XXXII 9 {} {} 10 twenty XL} |
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309 | |||
310 | test_compound_select_flippable select9-2.$iOuterLoop.5 { |
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311 | SELECT * FROM t1 WHERE a<5 UNION ALL SELECT * FROM t2 WHERE d>=5 ORDER BY 2, 1 |
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312 | } {3 {} {} 6 {} {} 9 {} {} 4 four IV 7 fourteen XXVIII 1 one I 8 sixteen XXXII 5 ten XX 10 twenty XL 2 two II} |
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313 | |||
314 | test_compound_select_flippable select9-2.$iOuterLoop.6 { |
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315 | SELECT * FROM t1 WHERE a<5 UNION ALL SELECT * FROM t2 WHERE d>=5 |
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316 | ORDER BY 2 COLLATE reverse, 1 |
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317 | } {3 {} {} 6 {} {} 9 {} {} 2 two II 10 twenty XL 5 ten XX 8 sixteen XXXII 1 one I 7 fourteen XXVIII 4 four IV} |
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318 | |||
319 | test_compound_select select9-2.$iOuterLoop.4 { |
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320 | SELECT a FROM t1 WHERE a<8 EXCEPT SELECT d FROM t2 WHERE d<=3 ORDER BY 1 |
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321 | } {4 5 6 7} |
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322 | |||
323 | test_compound_select select9-2.$iOuterLoop.4 { |
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324 | SELECT a FROM t1 WHERE a<8 INTERSECT SELECT d FROM t2 WHERE d<=3 ORDER BY 1 |
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325 | } {1 2 3} |
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326 | |||
327 | } |
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328 | |||
329 | do_test select9-2.X { |
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330 | execsql { |
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331 | DROP INDEX i1; |
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332 | DROP INDEX i2; |
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333 | DROP INDEX i3; |
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334 | } |
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335 | } {} |
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336 | |||
337 | # This procedure executes the SQL. Then it checks the generated program |
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338 | # for the SQL and appends a "nosort" to the result if the program contains the |
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339 | # SortCallback opcode. If the program does not contain the SortCallback |
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340 | # opcode it appends "sort" |
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341 | # |
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342 | proc cksort {sql} { |
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343 | set ::sqlite_sort_count 0 |
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344 | set data [execsql $sql] |
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345 | if {$::sqlite_sort_count} {set x sort} {set x nosort} |
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346 | lappend data $x |
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347 | return $data |
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348 | } |
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349 | |||
350 | # If the right indexes exist, the following query: |
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351 | # |
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352 | # SELECT t1.a FROM t1 UNION ALL SELECT t2.d FROM t2 ORDER BY 1 |
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353 | # |
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354 | # can use indexes to run without doing a in-memory sort operation. |
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355 | # This block of tests (select9-3.*) is used to check if the same |
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356 | # is possible with: |
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357 | # |
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358 | # CREATE VIEW v1 AS SELECT a FROM t1 UNION ALL SELECT d FROM t2 |
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359 | # SELECT a FROM v1 ORDER BY 1 |
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360 | # |
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361 | # It turns out that it is. |
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362 | # |
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363 | do_test select9-3.1 { |
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364 | cksort { SELECT a FROM t1 ORDER BY 1 } |
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365 | } {1 2 3 4 5 6 7 8 9 10 sort} |
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366 | do_test select9-3.2 { |
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367 | execsql { CREATE INDEX i1 ON t1(a) } |
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368 | cksort { SELECT a FROM t1 ORDER BY 1 } |
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369 | } {1 2 3 4 5 6 7 8 9 10 nosort} |
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370 | do_test select9-3.3 { |
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371 | cksort { SELECT a FROM t1 UNION ALL SELECT d FROM t2 ORDER BY 1 LIMIT 5 } |
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372 | } {1 1 2 2 3 sort} |
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373 | do_test select9-3.4 { |
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374 | execsql { CREATE INDEX i2 ON t2(d) } |
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375 | cksort { SELECT a FROM t1 UNION ALL SELECT d FROM t2 ORDER BY 1 LIMIT 5 } |
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376 | } {1 1 2 2 3 nosort} |
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377 | do_test select9-3.5 { |
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378 | execsql { CREATE VIEW v1 AS SELECT a FROM t1 UNION ALL SELECT d FROM t2 } |
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379 | cksort { SELECT a FROM v1 ORDER BY 1 LIMIT 5 } |
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380 | } {1 1 2 2 3 nosort} |
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381 | do_test select9-3.X { |
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382 | execsql { |
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383 | DROP INDEX i1; |
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384 | DROP INDEX i2; |
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385 | DROP VIEW v1; |
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386 | } |
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387 | } {} |
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388 | |||
389 | # This block of tests is the same as the preceding one, except that |
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390 | # "UNION" is tested instead of "UNION ALL". |
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391 | # |
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392 | do_test select9-4.1 { |
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393 | cksort { SELECT a FROM t1 ORDER BY 1 } |
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394 | } {1 2 3 4 5 6 7 8 9 10 sort} |
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395 | do_test select9-4.2 { |
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396 | execsql { CREATE INDEX i1 ON t1(a) } |
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397 | cksort { SELECT a FROM t1 ORDER BY 1 } |
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398 | } {1 2 3 4 5 6 7 8 9 10 nosort} |
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399 | do_test select9-4.3 { |
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400 | cksort { SELECT a FROM t1 UNION SELECT d FROM t2 ORDER BY 1 LIMIT 5 } |
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401 | } {1 2 3 4 5 sort} |
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402 | do_test select9-4.4 { |
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403 | execsql { CREATE INDEX i2 ON t2(d) } |
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404 | cksort { SELECT a FROM t1 UNION SELECT d FROM t2 ORDER BY 1 LIMIT 5 } |
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405 | } {1 2 3 4 5 nosort} |
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406 | do_test select9-4.5 { |
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407 | execsql { CREATE VIEW v1 AS SELECT a FROM t1 UNION SELECT d FROM t2 } |
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408 | cksort { SELECT a FROM v1 ORDER BY 1 LIMIT 5 } |
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409 | } {1 2 3 4 5 sort} |
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410 | do_test select9-4.X { |
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411 | execsql { |
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412 | DROP INDEX i1; |
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413 | DROP INDEX i2; |
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414 | DROP VIEW v1; |
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415 | } |
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416 | } {} |
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417 | |||
418 | |||
419 | finish_test |