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third_party/sqlite/src/test/select2.test

Index: third_party/sqlite/src/test/select2.test
diff --git a/third_party/sqlite/src/test/select2.test b/third_party/sqlite/src/test/select2.test
new file mode 100644
index 0000000000000000000000000000000000000000..35f8dd587905eafd358b23f51b78e009867cdf6a
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+# 2001 September 15
+#
+# 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 the SELECT statement.
+#
+# $Id: select2.test,v 1.28 2009/01/15 15:23:59 drh Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# Create a table with some data
+#
+execsql {CREATE TABLE tbl1(f1 int, f2 int)}
+execsql {BEGIN}
+for {set i 0} {$i<=30} {incr i} {
+  execsql "INSERT INTO tbl1 VALUES([expr {$i%9}],[expr {$i%10}])"
+}
+execsql {COMMIT}
+
+# Do a second query inside a first.
+#
+do_test select2-1.1 {
+  set sql {SELECT DISTINCT f1 FROM tbl1 ORDER BY f1}
+  set r {}
+  catch {unset data}
+  db eval $sql data {
+    set f1 $data(f1)
+    lappend r $f1:
+    set sql2 "SELECT f2 FROM tbl1 WHERE f1=$f1 ORDER BY f2"
+    db eval $sql2 d2 {
+      lappend r $d2(f2)
+    }
+  }
+  set r
+} {0: 0 7 8 9 1: 0 1 8 9 2: 0 1 2 9 3: 0 1 2 3 4: 2 3 4 5: 3 4 5 6: 4 5 6 7: 5 6 7 8: 6 7 8}
+
+do_test select2-1.2 {
+  set sql {SELECT DISTINCT f1 FROM tbl1 WHERE f1>3 AND f1<5}
+  set r {}
+  db eval $sql data {
+    set f1 $data(f1)
+    lappend r $f1:
+    set sql2 "SELECT f2 FROM tbl1 WHERE f1=$f1 ORDER BY f2"
+    db eval $sql2 d2 {
+      lappend r $d2(f2)
+    }
+  }
+  set r
+} {4: 2 3 4}
+unset data
+
+# Create a largish table. Do this twice, once using the TCL cache and once
+# without.  Compare the performance to make sure things go faster with the
+# cache turned on.
+#
+ifcapable tclvar {
+  do_test select2-2.0.1 {
+    set t1 [time {
+      execsql {CREATE TABLE tbl2(f1 int, f2 int, f3 int); BEGIN;}
+      for {set i 1} {$i<=30000} {incr i} {
+        set i2 [expr {$i*2}]
+        set i3 [expr {$i*3}]
+        db eval {INSERT INTO tbl2 VALUES($i,$i2,$i3)}
+      }
+      execsql {COMMIT}
+    }]
+    list
+  } {}
+  puts "time with cache: $::t1"
+}
+catch {execsql {DROP TABLE tbl2}}
+do_test select2-2.0.2 {
+  set t2 [time {
+    execsql {CREATE TABLE tbl2(f1 int, f2 int, f3 int); BEGIN;}
+    for {set i 1} {$i<=30000} {incr i} {
+      set i2 [expr {$i*2}]
+      set i3 [expr {$i*3}]
+      execsql "INSERT INTO tbl2 VALUES($i,$i2,$i3)"
+    }
+    execsql {COMMIT}
+  }]
+  list
+} {}
+puts "time without cache: $t2"
+#ifcapable tclvar {
+#  do_test select2-2.0.3 {
+#    expr {[lindex $t1 0]<[lindex $t2 0]}
+#  } 1
+#}
+
+do_test select2-2.1 {
+  execsql {SELECT count(*) FROM tbl2}
+} {30000}
+do_test select2-2.2 {
+  execsql {SELECT count(*) FROM tbl2 WHERE f2>1000}
+} {29500}
+
+do_test select2-3.1 {
+  execsql {SELECT f1 FROM tbl2 WHERE 1000=f2}
+} {500}
+
+do_test select2-3.2a {
+  execsql {CREATE INDEX idx1 ON tbl2(f2)}
+} {}
+do_test select2-3.2b {
+  execsql {SELECT f1 FROM tbl2 WHERE 1000=f2}
+} {500}
+do_test select2-3.2c {
+  execsql {SELECT f1 FROM tbl2 WHERE f2=1000}
+} {500}
+do_test select2-3.2d {
+  set sqlite_search_count 0
+  execsql {SELECT * FROM tbl2 WHERE 1000=f2}
+  set sqlite_search_count
+} {3}
+do_test select2-3.2e {
+  set sqlite_search_count 0
+  execsql {SELECT * FROM tbl2 WHERE f2=1000}
+  set sqlite_search_count
+} {3}
+
+# Make sure queries run faster with an index than without
+#
+do_test select2-3.3 {
+  execsql {DROP INDEX idx1}
+  set sqlite_search_count 0
+  execsql {SELECT f1 FROM tbl2 WHERE f2==2000}
+  set sqlite_search_count
+} {29999}
+
+# Make sure we can optimize functions in the WHERE clause that
+# use fields from two or more different table.  (Bug #6)
+#
+do_test select2-4.1 {
+  execsql {
+    CREATE TABLE aa(a);
+    CREATE TABLE bb(b);
+    INSERT INTO aa VALUES(1);
+    INSERT INTO aa VALUES(3);
+    INSERT INTO bb VALUES(2);
+    INSERT INTO bb VALUES(4);
+    SELECT * FROM aa, bb WHERE max(a,b)>2;
+  }
+} {1 4 3 2 3 4}
+do_test select2-4.2 {
+  execsql {
+    INSERT INTO bb VALUES(0);
+    SELECT * FROM aa CROSS JOIN bb WHERE b;
+  }
+} {1 2 1 4 3 2 3 4}
+do_test select2-4.3 {
+  execsql {
+    SELECT * FROM aa CROSS JOIN bb WHERE NOT b;
+  }
+} {1 0 3 0}
+do_test select2-4.4 {
+  execsql {
+    SELECT * FROM aa, bb WHERE min(a,b);
+  }
+} {1 2 1 4 3 2 3 4}
+do_test select2-4.5 {
+  execsql {
+    SELECT * FROM aa, bb WHERE NOT min(a,b);
+  }
+} {1 0 3 0}
+do_test select2-4.6 {
+  execsql {
+    SELECT * FROM aa, bb WHERE CASE WHEN a=b-1 THEN 1 END;
+  }
+} {1 2 3 4}
+do_test select2-4.7 {
+  execsql {
+    SELECT * FROM aa, bb WHERE CASE WHEN a=b-1 THEN 0 ELSE 1 END;
+  }
+} {1 4 1 0 3 2 3 0}
+
+finish_test