From: drh <drh@noemail.net>
Date: Wed, 27 Nov 2013 13:48:02 +0000 (+0000)
Subject: Additional test cases for skip-scan.
X-Git-Tag: version-3.8.2~26
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ce00a8378511791f557b19b35f780c9b7924b3f9;p=thirdparty%2Fsqlite.git

Additional test cases for skip-scan.

FossilOrigin-Name: ce70803f5e1bfb4dc495d3a0c2ddd5ee6c3a10fe
---

diff --git a/manifest b/manifest
index 9d807e7a96..1f661d4044 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Make\ssure\sthe\scolWidth\sarray\sis\scorrectly\sinitialized\sin\sthe\s".explain"\ncommand\sof\sthe\sshell.
-D 2013-11-27T13:24:18.470
+C Additional\stest\scases\sfor\sskip-scan.
+D 2013-11-27T13:48:02.795
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in e1a9b4258bbde53f5636f4e238c65b7e11459e2b
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -808,7 +808,7 @@ F test/shortread1.test bb591ef20f0fd9ed26d0d12e80eee6d7ac8897a3
 F test/shrink.test 8c70f62b6e8eb4d54533de6d65bd06b1b9a17868
 F test/sidedelete.test f0ad71abe6233e3b153100f3b8d679b19a488329
 F test/skipscan1.test 6bb4891c2cc5efd5690a9da9e7508e53d4a68e10
-F test/skipscan2.test c1e21a19ec8fa3674e9ccd0475f20ef82c275838
+F test/skipscan2.test 5a4db0799c338ddbacb154aaa5589c0254b36a8d
 F test/soak.test 0b5b6375c9f4110c828070b826b3b4b0bb65cd5f
 F test/softheap1.test 40562fe6cac6d9827b7b42b86d45aedf12c15e24
 F test/sort.test 0e4456e729e5a92a625907c63dcdedfbe72c5dc5
@@ -1145,7 +1145,7 @@ F tool/vdbe-compress.tcl f12c884766bd14277f4fcedcae07078011717381
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
 F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
-P 83c0bb9913838d18ba355033afde6e38b4690842
-R 67ef9465051c6a15a8474ed69b1e156e
+P ceebcdcaf1acf409b77b4cc2903b4570001f098a
+R bcfcf6f48c85e4fa706276f8ed169192
 U drh
-Z 9742934aff6856eb16d7b29615a17978
+Z 88c6067bf128a26cfad7d97b15ea7137
diff --git a/manifest.uuid b/manifest.uuid
index 1f8d47bbde..eb9f0afe6d 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-ceebcdcaf1acf409b77b4cc2903b4570001f098a
\ No newline at end of file
+ce70803f5e1bfb4dc495d3a0c2ddd5ee6c3a10fe
\ No newline at end of file
diff --git a/test/skipscan2.test b/test/skipscan2.test
index 3858ed5e07..e39b16ed27 100644
--- a/test/skipscan2.test
+++ b/test/skipscan2.test
@@ -99,6 +99,51 @@ do_execsql_test skipscan2-1.7 {
   ORDER BY 1;
 } {David Jack Patrick Quiana Xavier}
 
+# Add 8 more people, bringing the total to 34.  Then the number of
+# duplicates in the left-column of the index will be 17 and 
+# skip-scan should not be used after an (unfudged) ANALYZE.
+#
+do_execsql_test skipscan2-1.8 {
+  INSERT INTO people VALUES('Angie','student',166);
+  INSERT INTO people VALUES('Brad','student',176);
+  INSERT INTO people VALUES('Claire','student',168);
+  INSERT INTO people VALUES('Donald','student',162);
+  INSERT INTO people VALUES('Elaine','student',177);
+  INSERT INTO people VALUES('Frazier','student',159);
+  INSERT INTO people VALUES('Grace','student',179);
+  INSERT INTO people VALUES('Horace','student',166);
+  ANALYZE;
+  SELECT stat FROM sqlite_stat1 WHERE idx='people_idx1';
+} {{34 17 2}}
+db cache flush
+do_execsql_test skipscan2-1.9 {
+  SELECT name FROM people WHERE height>=180 ORDER BY +name;
+} {David Jack Patrick Quiana Xavier}
+do_execsql_test skipscan2-1.9eqp {
+  EXPLAIN QUERY PLAN
+  SELECT name FROM people WHERE height>=180 ORDER BY +name;
+} {~/*INDEX people_idx1 */}
+
+# Add 2 more people, bringing the total to 36.  Then the number of
+# duplicates in the left-column of the index will be 18 and 
+# skip-scan will be used after an (unfudged) ANALYZE.
+#
+do_execsql_test skipscan2-1.10 {
+  INSERT INTO people VALUES('Ingrad','student',155);
+  INSERT INTO people VALUES('Jacob','student',179);
+  ANALYZE;
+  SELECT stat FROM sqlite_stat1 WHERE idx='people_idx1';
+} {{36 18 2}}
+db cache flush
+do_execsql_test skipscan2-1.11 {
+  SELECT name FROM people WHERE height>=180 ORDER BY +name;
+} {David Jack Patrick Quiana Xavier}
+do_execsql_test skipscan2-1.11eqp {
+  EXPLAIN QUERY PLAN
+  SELECT name FROM people WHERE height>=180 ORDER BY +name;
+} {/*INDEX people_idx1 */}
+
+
 # Repeat using a WITHOUT ROWID table.
 #
 do_execsql_test skipscan2-2.1 {
@@ -111,7 +156,7 @@ do_execsql_test skipscan2-2.1 {
   CREATE INDEX peoplew_idx1 ON peoplew(role, height);
   INSERT INTO peoplew(name,role,height)
      SELECT name, role, height FROM  people;
-  DROP TABLE people;
+  ALTER TABLE people RENAME TO old_people;
   SELECT name FROM peoplew WHERE height>=180 ORDER BY +name;
 } {David Jack Patrick Quiana Xavier}
 do_execsql_test skipscan2-2.2 {
@@ -130,11 +175,6 @@ do_execsql_test skipscan2-2.2 {
 #
 do_execsql_test skipscan2-2.4 {
   ANALYZE;
-  -- We do not have enough people above to actually force the use
-  -- of a skip-scan.  So make a manual adjustment to the stat1 table
-  -- to make it seem like there are many more.
-  UPDATE sqlite_stat1 SET stat='10000 5000 20' WHERE idx='peoplew_idx1';
-  ANALYZE sqlite_master;
 }
 db cache flush
 do_execsql_test skipscan2-2.5 {