[sql] Import SQLite 3.17.0.

third_party/sqlite/src/test/tempdb2.test

+# 2016 March 3
+#
+# 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.
+#
+#***********************************************************************
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix tempdb2
+
+db close
+sqlite3 db ""
+
+proc int2str {i} { string range [string repeat "$i." 450] 0 899 }
+db func int2str int2str
+
+#-------------------------------------------------------------------------
+#
+#  1.1: Write a big transaction to the db. One so large that it forces
+#       the file to be created and the cache flushed to disk on COMMIT.
+#
+#  1.2: Write a small transaction - one small enough that it remains in
+#       memory on COMMIT. All the pages of table [t1] are now dirty.
+#
+#  1.3: Delete the contents of [t1]. This moves all of its leaves to the
+#       free-list and causes the btree layer to call PagerDontWrite() on
+#       each of them.
+#
+#       Then do a big update on table [t2]. So big that the former leaves
+#       of [t1] are forced out of the cache. Then roll back the transaction.
+#       If the PagerDontWrite() calls are honoured and the data is not written
+#       to disk, the update made in test 1.2 will be lost at this point. Or, if
+#       they are ignored (as they should be for temp databases), the update
+#       will be safely written out to disk before the cache entries are
+#       discarded.
+#
+do_execsql_test 1.1 {
+  PRAGMA page_size=1024;
+  PRAGMA cache_size=50;
+
+  BEGIN;
+    CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
+    INSERT INTO t1 VALUES(1, int2str(1));
+    INSERT INTO t1 VALUES(2, int2str(1));
+    INSERT INTO t1 VALUES(3, int2str(1));
+
+    CREATE TABLE t2(a INTEGER PRIMARY KEY, b);
+    WITH c(x) AS ( VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100 ) 
+    INSERT INTO t2 SELECT x, int2str(x) FROM c;
+  COMMIT;
+
+  PRAGMA lock_status;
+} {main unlocked temp closed}
+
+do_execsql_test 1.2 {
+  UPDATE t1 SET b=int2str(2);
+  SELECT b=int2str(2) FROM t1
+} {1 1 1}
+
+do_execsql_test 1.3 {
+  BEGIN;
+    DELETE FROM t1;
+    UPDATE t2 SET b=int2str(a+1);
+  ROLLBACK;
+}
+
+do_execsql_test 1.4 {
+  SELECT b=int2str(2) FROM t1
+} {1 1 1}
+
+finish_test