derek.holloway
7502bf64a4
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78 lines
2.0 KiB
Plaintext
78 lines
2.0 KiB
Plaintext
# 2014-04-21
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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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#
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# Test that ticket [b75a9ca6b0] has been fixed.
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#
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# Ticket [b75a9ca6b0] concerns queries that have both a GROUP BY
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# and an ORDER BY. This code verifies that SQLite is able to
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# optimize out the ORDER BY in some circumstances, but retains the
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# ORDER BY when necessary.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set testprefix tkt-b75a9ca6b0
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do_execsql_test 1 {
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CREATE TABLE t1 (x, y);
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INSERT INTO t1 VALUES (1, 3);
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INSERT INTO t1 VALUES (2, 2);
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INSERT INTO t1 VALUES (3, 1);
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}
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do_execsql_test 1.1 {
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CREATE INDEX i1 ON t1(x, y);
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}
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set idxscan {SCAN t1 USING COVERING INDEX i1}
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set tblscan {SCAN t1}
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set grpsort {USE TEMP B-TREE FOR GROUP BY}
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set sort {USE TEMP B-TREE FOR ORDER BY}
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foreach {tn q res eqp} [subst -nocommands {
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1 "SELECT * FROM t1 GROUP BY x, y ORDER BY x,y"
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{1 3 2 2 3 1} {$idxscan}
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2 "SELECT * FROM t1 GROUP BY x, y ORDER BY x"
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{1 3 2 2 3 1} {$idxscan*$sort}
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3 "SELECT * FROM t1 GROUP BY y, x ORDER BY y, x"
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{3 1 2 2 1 3} {$idxscan*$sort}
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4 "SELECT * FROM t1 GROUP BY x ORDER BY x"
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{1 3 2 2 3 1} {$idxscan}
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5 "SELECT * FROM t1 GROUP BY y ORDER BY y"
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{3 1 2 2 1 3} {$tblscan*$grpsort}
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6 "SELECT * FROM t1 GROUP BY y ORDER BY x"
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{1 3 2 2 3 1} {$tblscan*$grpsort*$sort}
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7 "SELECT * FROM t1 GROUP BY x, y ORDER BY x, y DESC"
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{1 3 2 2 3 1} {$idxscan*$sort}
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8 "SELECT * FROM t1 GROUP BY x, y ORDER BY x DESC, y DESC"
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{3 1 2 2 1 3} {$idxscan}
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9 "SELECT * FROM t1 GROUP BY x, y ORDER BY x ASC, y ASC"
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{1 3 2 2 3 1} {$idxscan}
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10 "SELECT * FROM t1 GROUP BY x, y ORDER BY x COLLATE nocase, y"
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{1 3 2 2 3 1} {$idxscan*$sort}
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}] {
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do_execsql_test 1.$tn.1 $q $res
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do_eqp_test 1.$tn.2 $q $eqp
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}
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finish_test
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