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+# 2014-03-21
+#
+# 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.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library. The
+# focus of this file is testing that the block-sort optimization.
+#
+
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set ::testprefix orderby6
+
+# Run all tests twice. Once with a normal table and a second time
+# with a WITHOUT ROWID table
+#
+foreach {tn rowidclause} {1 {} 2 {WITHOUT ROWID}} {
+
+ # Construct a table with 1000 rows and a split primary key
+ #
+ reset_db
+ do_test $tn.1 {
+ db eval "CREATE TABLE t1(a,b,c,PRIMARY KEY(b,c)) $rowidclause;"
+ db eval {
+ WITH RECURSIVE
+ cnt(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM cnt WHERE x<1000)
+ INSERT INTO t1 SELECT x, x%40, x/40 FROM cnt;
+ }
+ } {}
+
+ # Run various ORDER BY queries that can benefit from block-sort.
+ # Compare the output to the same output using a full-sort enforced
+ # by adding + to each term of the ORDER BY clause.
+ #
+ do_execsql_test $tn.2 {
+ SELECT b,a,c FROM t1 ORDER BY b,a,c;
+ } [db eval {SELECT b,a,c FROM t1 ORDER BY +b,+a,+c}]
+ do_execsql_test $tn.3 {
+ SELECT b,a,c FROM t1 ORDER BY b,c DESC,a;
+ } [db eval {SELECT b,a,c FROM t1 ORDER BY +b,+c DESC,+a}]
+ do_execsql_test $tn.4 {
+ SELECT b,a,c FROM t1 ORDER BY b DESC,c,a;
+ } [db eval {SELECT b,a,c FROM t1 ORDER BY +b DESC,+c,+a}]
+ do_execsql_test $tn.5 {
+ SELECT b,a,c FROM t1 ORDER BY b DESC,a,c;
+ } [db eval {SELECT b,a,c FROM t1 ORDER BY +b DESC,+a,+c}]
+
+ # LIMIT and OFFSET clauses on block-sort queries.
+ #
+ do_execsql_test $tn.11 {
+ SELECT a FROM t1 ORDER BY b, a LIMIT 10 OFFSET 20;
+ } {840 880 920 960 1000 1 41 81 121 161}
+ do_execsql_test $tn.11x {
+ SELECT a FROM t1 ORDER BY +b, a LIMIT 10 OFFSET 20;
+ } {840 880 920 960 1000 1 41 81 121 161}
+
+ do_execsql_test $tn.12 {
+ SELECT a FROM t1 ORDER BY b DESC, a LIMIT 10 OFFSET 20;
+ } {839 879 919 959 999 38 78 118 158 198}
+ do_execsql_test $tn.12 {
+ SELECT a FROM t1 ORDER BY +b DESC, a LIMIT 10 OFFSET 20;
+ } {839 879 919 959 999 38 78 118 158 198}
+
+ do_execsql_test $tn.13 {
+ SELECT a FROM t1 ORDER BY b, a DESC LIMIT 10 OFFSET 45;
+ } {161 121 81 41 1 962 922 882 842 802}
+ do_execsql_test $tn.13x {
+ SELECT a FROM t1 ORDER BY +b, a DESC LIMIT 10 OFFSET 45;
+ } {161 121 81 41 1 962 922 882 842 802}
+
+ do_execsql_test $tn.14 {
+ SELECT a FROM t1 ORDER BY b DESC, a LIMIT 10 OFFSET 45;
+ } {838 878 918 958 998 37 77 117 157 197}
+ do_execsql_test $tn.14x {
+ SELECT a FROM t1 ORDER BY +b DESC, a LIMIT 10 OFFSET 45;
+ } {838 878 918 958 998 37 77 117 157 197}
+
+ # Many test cases where the LIMIT+OFFSET window is in various
+ # alignments with block-sort boundaries.
+ #
+ foreach {tx limit offset orderby} {
+ 1 10 24 {+b,+a}
+ 2 10 25 {+b,+a}
+ 3 10 26 {+b,+a}
+ 4 10 39 {+b,+a}
+ 5 10 40 {+b,+a}
+ 6 10 41 {+b,+a}
+ 7 27 24 {+b,+a}
+ 8 27 49 {+b,+a}
+ 11 10 24 {+b DESC,+a}
+ 12 10 25 {+b DESC,+a}
+ 13 10 26 {+b DESC,+a}
+ 14 10 39 {+b DESC,+a}
+ 15 10 40 {+b DESC,+a}
+ 16 10 41 {+b DESC,+a}
+ 17 27 24 {+b DESC,+a}
+ 18 27 49 {+b DESC,+a}
+ 21 10 24 {+b,+a DESC}
+ 22 10 25 {+b,+a DESC}
+ 23 10 26 {+b,+a DESC}
+ 24 10 39 {+b,+a DESC}
+ 25 10 40 {+b,+a DESC}
+ 26 10 41 {+b,+a DESC}
+ 27 27 24 {+b,+a DESC}
+ 28 27 49 {+b,+a DESC}
+ 31 10 24 {+b DESC,+a DESC}
+ 32 10 25 {+b DESC,+a DESC}
+ 33 10 26 {+b DESC,+a DESC}
+ 34 10 39 {+b DESC,+a DESC}
+ 35 10 40 {+b DESC,+a DESC}
+ 36 10 41 {+b DESC,+a DESC}
+ 37 27 24 {+b DESC,+a DESC}
+ 38 27 49 {+b DESC,+a DESC}
+ } {
+ set sql1 "SELECT a FROM t1 ORDER BY $orderby LIMIT $limit OFFSET $offset;"
+ set sql2 [string map {+ {}} $sql1]
+ # puts $sql2\n$sql1\n[db eval $sql2]
+ do_test $tn.21.$tx {db eval $::sql2} [db eval $sql1]
+ }
+
+ ########################################################################
+ # A second test table, t2, has many columns open to sorting.
+ do_test $tn.31 {
+ db eval "CREATE TABLE t2(a,b,c,d,e,f,PRIMARY KEY(b,c,d,e,f)) $rowidclause;"
+ db eval {
+ WITH RECURSIVE
+ cnt(x) AS (VALUES(0) UNION ALL SELECT x+1 FROM cnt WHERE x<242)
+ INSERT INTO t2 SELECT x, x%3, (x/3)%3, (x/9)%3, (x/27)%3, (x/81)%3
+ FROM cnt;
+ }
+ } {}
+
+ do_execsql_test $tn.32 {
+ SELECT a FROM t2 ORDER BY b,c,d,e,f;
+ } [db eval {SELECT a FROM t2 ORDER BY +b,+c,+d,+e,+f;}]
+ do_execsql_test $tn.33 {
+ SELECT a FROM t2 ORDER BY b,c,d,e,+f;
+ } [db eval {SELECT a FROM t2 ORDER BY +b,+c,+d,+e,+f;}]
+ do_execsql_test $tn.34 {
+ SELECT a FROM t2 ORDER BY b,c,d,+e,+f;
+ } [db eval {SELECT a FROM t2 ORDER BY +b,+c,+d,+e,+f;}]
+ do_execsql_test $tn.35 {
+ SELECT a FROM t2 ORDER BY b,c,+d,+e,+f;
+ } [db eval {SELECT a FROM t2 ORDER BY +b,+c,+d,+e,+f;}]
+ do_execsql_test $tn.36 {
+ SELECT a FROM t2 ORDER BY b,+c,+d,+e,+f;
+ } [db eval {SELECT a FROM t2 ORDER BY +b,+c,+d,+e,+f;}]
+
+ do_execsql_test $tn.37 {
+ SELECT a FROM t2 ORDER BY b,c,d,e,f DESC;
+ } [db eval {SELECT a FROM t2 ORDER BY +b,+c,+d,+e,+f DESC;}]
+ do_execsql_test $tn.38 {
+ SELECT a FROM t2 ORDER BY b,c,d,e DESC,f;
+ } [db eval {SELECT a FROM t2 ORDER BY +b,+c,+d,+e DESC,+f;}]
+ do_execsql_test $tn.39 {
+ SELECT a FROM t2 ORDER BY b,c,d DESC,e,f;
+ } [db eval {SELECT a FROM t2 ORDER BY +b,+c,+d DESC,+e,+f;}]
+ do_execsql_test $tn.40 {
+ SELECT a FROM t2 ORDER BY b,c DESC,d,e,f;
+ } [db eval {SELECT a FROM t2 ORDER BY +b,+c DESC,+d,+e,+f;}]
+ do_execsql_test $tn.41 {
+ SELECT a FROM t2 ORDER BY b DESC,c,d,e,f;
+ } [db eval {SELECT a FROM t2 ORDER BY +b DESC,+c,+d,+e,+f;}]
+
+ do_execsql_test $tn.42 {
+ SELECT a FROM t2 ORDER BY b DESC,c DESC,d,e,f LIMIT 31;
+ } [db eval {SELECT a FROM t2 ORDER BY +b DESC,+c DESC,+d,+e,+f LIMIT 31}]
+ do_execsql_test $tn.43 {
+ SELECT a FROM t2 ORDER BY b,c,d,e,f DESC LIMIT 8 OFFSET 7;
+ } [db eval {SELECT a FROM t2 ORDER BY +b,+c,+d,+e,+f DESC LIMIT 8 OFFSET 7}]
+
+
+}
+
+
+
+finish_test
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