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Unified Diff: third_party/sqlite/src/test/whereF.test

Issue 949043002: Add //third_party/sqlite to dirs_to_snapshot, remove net_sql.patch (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 5 years, 10 months ago
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Index: third_party/sqlite/src/test/whereF.test
diff --git a/third_party/sqlite/src/test/whereF.test b/third_party/sqlite/src/test/whereF.test
new file mode 100644
index 0000000000000000000000000000000000000000..b9580bb196d200054c3e5d0802ec3a000b3e76f3
--- /dev/null
+++ b/third_party/sqlite/src/test/whereF.test
@@ -0,0 +1,122 @@
+# 2012 November 9
+#
+# 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 cases for query planning decisions.
+
+
+#
+# The tests in this file demonstrate the behaviour of the query planner
+# in determining the order in which joined tables are scanned.
+#
+# Assume there are two tables being joined - t1 and t2. Each has a cost
+# if it is the outer loop, and a cost if it is the inner loop. As follows:
+#
+# t1(outer) - cost of scanning t1 as the outer loop.
+# t1(inner) - cost of scanning t1 as the inner loop.
+# t2(outer) - cost of scanning t2 as the outer loop.
+# t2(inner) - cost of scanning t2 as the inner loop.
+#
+# Depending on the order in which the planner nests the scans, the total
+# cost of the join query is one of:
+#
+# t1(outer) * t2(inner)
+# t2(outer) * t1(inner)
+#
+# The tests in this file attempt to verify that the planner nests joins in
+# the correct order when the following are true:
+#
+# + (t1(outer) * t2(inner)) > (t1(inner) * t2(outer)
+# + t1(outer) < t2(outer)
+#
+# In other words, when the best overall query plan has t2 as the outer loop,
+# but when the outer loop is considered independent of the inner, t1 is the
+# most efficient choice.
+#
+# In order to make them more predictable, automatic indexes are turned off for
+# the tests in this file.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix whereF
+
+do_execsql_test 1.0 {
+ PRAGMA automatic_index = 0;
+ CREATE TABLE t1(a, b, c);
+ CREATE TABLE t2(d, e, f);
+ CREATE UNIQUE INDEX i1 ON t1(a);
+ CREATE UNIQUE INDEX i2 ON t2(d);
+} {}
+
+foreach {tn sql} {
+ 1 "SELECT * FROM t1, t2 WHERE t1.a=t2.e AND t2.d<t1.b AND t1.c!=10"
+ 2 "SELECT * FROM t2, t1 WHERE t1.a=t2.e AND t2.d<t1.b AND t1.c!=10"
+ 3 "SELECT * FROM t2 CROSS JOIN t1 WHERE t1.a=t2.e AND t2.d<t1.b AND t1.c!=10"
+} {
+ do_test 1.$tn {
+ db eval "EXPLAIN QUERY PLAN $sql"
+ } {/.*SCAN TABLE t2\y.*SEARCH TABLE t1\y.*/}
+}
+
+do_execsql_test 2.0 {
+ DROP TABLE t1;
+ DROP TABLE t2;
+ CREATE TABLE t1(a, b, c);
+ CREATE TABLE t2(d, e, f);
+
+ CREATE UNIQUE INDEX i1 ON t1(a);
+ CREATE UNIQUE INDEX i2 ON t1(b);
+ CREATE UNIQUE INDEX i3 ON t2(d);
+} {}
+
+foreach {tn sql} {
+ 1 "SELECT * FROM t1, t2 WHERE t1.a>? AND t2.d>t1.c AND t1.b=t2.e"
+ 2 "SELECT * FROM t2, t1 WHERE t1.a>? AND t2.d>t1.c AND t1.b=t2.e"
+ 3 "SELECT * FROM t2 CROSS JOIN t1 WHERE t1.a>? AND t2.d>t1.c AND t1.b=t2.e"
+} {
+ do_test 2.$tn {
+ db eval "EXPLAIN QUERY PLAN $sql"
+ } {/.*SCAN TABLE t2\y.*SEARCH TABLE t1\y.*/}
+}
+
+do_execsql_test 3.0 {
+ DROP TABLE t1;
+ DROP TABLE t2;
+ CREATE TABLE t1(a, b, c);
+ CREATE TABLE t2(d, e, f);
+
+ CREATE UNIQUE INDEX i1 ON t1(a, b);
+ CREATE INDEX i2 ON t2(d);
+} {}
+
+foreach {tn sql} {
+ 1 {SELECT t1.a, t1.b, t2.d, t2.e FROM t1, t2
+ WHERE t2.d=t1.b AND t1.a=(t2.d+1) AND t1.b = (t2.e+1)}
+
+ 2 {SELECT t1.a, t1.b, t2.d, t2.e FROM t2, t1
+ WHERE t2.d=t1.b AND t1.a=(t2.d+1) AND t1.b = (t2.e+1)}
+
+ 3 {SELECT t1.a, t1.b, t2.d, t2.e FROM t2 CROSS JOIN t1
+ WHERE t2.d=t1.b AND t1.a=(t2.d+1) AND t1.b = (t2.e+1)}
+} {
+ do_test 3.$tn {
+ db eval "EXPLAIN QUERY PLAN $sql"
+ } {/.*SCAN TABLE t2\y.*SEARCH TABLE t1\y.*/}
+}
+
+do_execsql_test 4.0 {
+ CREATE TABLE t4(a,b,c,d,e, PRIMARY KEY(a,b,c));
+ CREATE INDEX t4adc ON t4(a,d,c);
+ CREATE UNIQUE INDEX t4aebc ON t4(a,e,b,c);
+ EXPLAIN QUERY PLAN SELECT rowid FROM t4 WHERE a=? AND b=?;
+} {/a=. AND b=./}
+
+finish_test
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