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+# 2014-04-21
+#
+# The author disclaims copyright to this source code. In place of
+# a legal notice, here is a blessing:
+#
+# May you do good and not evil.
+# May you find forgiveness for yourself and forgive others.
+# May you share freely, never taking more than you give.
+#
+#*************************************************************************
+#
+# Test that ticket [b75a9ca6b0] has been fixed.
+#
+# Ticket [b75a9ca6b0] concerns queries that have both a GROUP BY
+# and an ORDER BY. This code verifies that SQLite is able to
+# optimize out the ORDER BY in some circumstances, but retains the
+# ORDER BY when necessary.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix tkt-b75a9ca6b0
+
+do_execsql_test 1 {
+ CREATE TABLE t1 (x, y);
+ INSERT INTO t1 VALUES (1, 3);
+ INSERT INTO t1 VALUES (2, 2);
+ INSERT INTO t1 VALUES (3, 1);
+}
+
+do_execsql_test 1.1 {
+ CREATE INDEX i1 ON t1(x, y);
+}
+
+set idxscan {SCAN t1 USING COVERING INDEX i1}
+set tblscan {SCAN t1}
+set grpsort {USE TEMP B-TREE FOR GROUP BY}
+set sort {USE TEMP B-TREE FOR ORDER BY}
+
+foreach {tn q res eqp} [subst -nocommands {
+ 1 "SELECT * FROM t1 GROUP BY x, y ORDER BY x,y"
+ {1 3 2 2 3 1} {$idxscan}
+
+ 2 "SELECT * FROM t1 GROUP BY x, y ORDER BY x"
+ {1 3 2 2 3 1} {$idxscan*$sort}
+
+ 3 "SELECT * FROM t1 GROUP BY y, x ORDER BY y, x"
+ {3 1 2 2 1 3} {$idxscan*$sort}
+
+ 4 "SELECT * FROM t1 GROUP BY x ORDER BY x"
+ {1 3 2 2 3 1} {$idxscan}
+
+ 5 "SELECT * FROM t1 GROUP BY y ORDER BY y"
+ {3 1 2 2 1 3} {$tblscan*$grpsort}
+
+ 6 "SELECT * FROM t1 GROUP BY y ORDER BY x"
+ {1 3 2 2 3 1} {$tblscan*$grpsort*$sort}
+
+ 7 "SELECT * FROM t1 GROUP BY x, y ORDER BY x, y DESC"
+ {1 3 2 2 3 1} {$idxscan*$sort}
+
+ 8 "SELECT * FROM t1 GROUP BY x, y ORDER BY x DESC, y DESC"
+ {3 1 2 2 1 3} {$idxscan}
+
+ 9 "SELECT * FROM t1 GROUP BY x, y ORDER BY x ASC, y ASC"
+ {1 3 2 2 3 1} {$idxscan}
+
+ 10 "SELECT * FROM t1 GROUP BY x, y ORDER BY x COLLATE nocase, y"
+ {1 3 2 2 3 1} {$idxscan*$sort}
+
+}] {
+ do_execsql_test 1.$tn.1 $q $res
+ do_eqp_test 1.$tn.2 $q $eqp
+}
+
+
+finish_test