author | Pat Downey <patd@symbian.org> |
Wed, 01 Sep 2010 12:39:58 +0100 | |
branch | RCL_3 |
changeset 24 | cc28652e0254 |
parent 0 | 08ec8eefde2f |
permissions | -rw-r--r-- |
0
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# 2006 January 31 |
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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. The |
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# focus of this file is testing the join reordering optimization |
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# in cases that include a LEFT JOIN. |
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# |
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# $Id: where3.test,v 1.4 2008/04/17 19:14:02 drh Exp $ |
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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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# The following is from ticket #1652. |
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# |
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# A comma join then a left outer join: A,B left join C. |
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# Arrange indices so that the B table is chosen to go first. |
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# Also put an index on C, but make sure that A is chosen before C. |
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# |
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do_test where3-1.1 { |
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execsql { |
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CREATE TABLE t1(a, b); |
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CREATE TABLE t2(p, q); |
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CREATE TABLE t3(x, y); |
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INSERT INTO t1 VALUES(111,'one'); |
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INSERT INTO t1 VALUES(222,'two'); |
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INSERT INTO t1 VALUES(333,'three'); |
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|
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INSERT INTO t2 VALUES(1,111); |
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INSERT INTO t2 VALUES(2,222); |
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INSERT INTO t2 VALUES(4,444); |
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CREATE INDEX t2i1 ON t2(p); |
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INSERT INTO t3 VALUES(999,'nine'); |
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CREATE INDEX t3i1 ON t3(x); |
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SELECT * FROM t1, t2 LEFT JOIN t3 ON q=x WHERE p=2 AND a=q; |
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} |
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} {222 two 2 222 {} {}} |
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ifcapable explain { |
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do_test where3-1.1.1 { |
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explain_no_trace {SELECT * FROM t1, t2 LEFT JOIN t3 ON q=x |
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WHERE p=2 AND a=q} |
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} [explain_no_trace {SELECT * FROM t1, t2 LEFT JOIN t3 ON x=q |
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WHERE p=2 AND a=q}] |
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} |
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# Ticket #1830 |
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# |
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# This is similar to the above but with the LEFT JOIN on the |
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# other side. |
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# |
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do_test where3-1.2 { |
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execsql { |
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CREATE TABLE parent1(parent1key, child1key, Child2key, child3key); |
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CREATE TABLE child1 ( child1key NVARCHAR, value NVARCHAR ); |
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CREATE UNIQUE INDEX PKIDXChild1 ON child1 ( child1key ); |
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CREATE TABLE child2 ( child2key NVARCHAR, value NVARCHAR ); |
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INSERT INTO parent1(parent1key,child1key,child2key) |
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VALUES ( 1, 'C1.1', 'C2.1' ); |
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INSERT INTO child1 ( child1key, value ) VALUES ( 'C1.1', 'Value for C1.1' ); |
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INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.1', 'Value for C2.1' ); |
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INSERT INTO parent1 ( parent1key, child1key, child2key ) |
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VALUES ( 2, 'C1.2', 'C2.2' ); |
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INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.2', 'Value for C2.2' ); |
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INSERT INTO parent1 ( parent1key, child1key, child2key ) |
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VALUES ( 3, 'C1.3', 'C2.3' ); |
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INSERT INTO child1 ( child1key, value ) VALUES ( 'C1.3', 'Value for C1.3' ); |
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INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.3', 'Value for C2.3' ); |
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|
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SELECT parent1.parent1key, child1.value, child2.value |
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FROM parent1 |
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LEFT OUTER JOIN child1 ON child1.child1key = parent1.child1key |
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INNER JOIN child2 ON child2.child2key = parent1.child2key; |
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} |
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} {1 {Value for C1.1} {Value for C2.1} 2 {} {Value for C2.2} 3 {Value for C1.3} {Value for C2.3}} |
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ifcapable explain { |
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do_test where3-1.2.1 { |
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explain_no_trace { |
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SELECT parent1.parent1key, child1.value, child2.value |
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FROM parent1 |
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LEFT OUTER JOIN child1 ON child1.child1key = parent1.child1key |
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INNER JOIN child2 ON child2.child2key = parent1.child2key; |
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} |
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} [explain_no_trace { |
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SELECT parent1.parent1key, child1.value, child2.value |
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FROM parent1 |
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LEFT OUTER JOIN child1 ON parent1.child1key = child1.child1key |
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INNER JOIN child2 ON child2.child2key = parent1.child2key; |
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102 |
}] |
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103 |
} |
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104 |
|
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# This procedure executes the SQL. Then it appends |
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# the ::sqlite_query_plan variable. |
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107 |
# |
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108 |
proc queryplan {sql} { |
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set ::sqlite_sort_count 0 |
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set data [execsql $sql] |
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return [concat $data $::sqlite_query_plan] |
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} |
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113 |
|
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114 |
|
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# If you have a from clause of the form: A B C left join D |
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# then make sure the query optimizer is able to reorder the |
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# A B C part anyway it wants. |
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118 |
# |
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# Following the fix to ticket #1652, there was a time when |
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# the C table would not reorder. So the following reorderings |
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# were possible: |
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122 |
# |
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# A B C left join D |
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# B A C left join D |
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125 |
# |
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# But these reorders were not allowed |
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127 |
# |
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# C A B left join D |
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# A C B left join D |
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# C B A left join D |
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# B C A left join D |
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132 |
# |
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# The following tests are here to verify that the latter four |
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# reorderings are allowed again. |
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135 |
# |
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do_test where3-2.1 { |
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execsql { |
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CREATE TABLE tA(apk integer primary key, ax); |
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CREATE TABLE tB(bpk integer primary key, bx); |
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CREATE TABLE tC(cpk integer primary key, cx); |
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CREATE TABLE tD(dpk integer primary key, dx); |
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142 |
} |
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143 |
queryplan { |
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
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WHERE cpk=bx AND bpk=ax |
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146 |
} |
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} {tA {} tB * tC * tD *} |
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148 |
do_test where3-2.1.1 { |
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149 |
queryplan { |
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk |
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151 |
WHERE cpk=bx AND bpk=ax |
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152 |
} |
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} {tA {} tB * tC * tD *} |
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154 |
do_test where3-2.1.2 { |
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155 |
queryplan { |
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156 |
SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk |
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157 |
WHERE bx=cpk AND bpk=ax |
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158 |
} |
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159 |
} {tA {} tB * tC * tD *} |
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160 |
do_test where3-2.1.3 { |
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161 |
queryplan { |
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162 |
SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk |
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163 |
WHERE bx=cpk AND ax=bpk |
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164 |
} |
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165 |
} {tA {} tB * tC * tD *} |
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166 |
do_test where3-2.1.4 { |
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167 |
queryplan { |
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168 |
SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
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169 |
WHERE bx=cpk AND ax=bpk |
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170 |
} |
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171 |
} {tA {} tB * tC * tD *} |
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172 |
do_test where3-2.1.5 { |
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173 |
queryplan { |
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174 |
SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
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175 |
WHERE cpk=bx AND ax=bpk |
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176 |
} |
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177 |
} {tA {} tB * tC * tD *} |
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178 |
do_test where3-2.2 { |
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179 |
queryplan { |
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180 |
SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
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181 |
WHERE cpk=bx AND apk=bx |
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182 |
} |
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183 |
} {tB {} tA * tC * tD *} |
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184 |
do_test where3-2.3 { |
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185 |
queryplan { |
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186 |
SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
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187 |
WHERE cpk=bx AND apk=bx |
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188 |
} |
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189 |
} {tB {} tA * tC * tD *} |
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190 |
do_test where3-2.4 { |
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191 |
queryplan { |
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192 |
SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
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193 |
WHERE apk=cx AND bpk=ax |
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194 |
} |
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195 |
} {tC {} tA * tB * tD *} |
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196 |
do_test where3-2.5 { |
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197 |
queryplan { |
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198 |
SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
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199 |
WHERE cpk=ax AND bpk=cx |
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200 |
} |
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201 |
} {tA {} tC * tB * tD *} |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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do_test where3-2.5 { |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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queryplan { |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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WHERE bpk=cx AND apk=bx |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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} |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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} {tC {} tB * tA * tD *} |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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do_test where3-2.6 { |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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queryplan { |
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SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx |
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WHERE cpk=bx AND apk=cx |
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} |
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} {tB {} tC * tA * tD *} |
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|
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|
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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finish_test |