Index: third_party/sqlite/src/test/tempdb2.test |
diff --git a/third_party/sqlite/src/test/tempdb2.test b/third_party/sqlite/src/test/tempdb2.test |
new file mode 100644 |
index 0000000000000000000000000000000000000000..5f019bd11722a5e4ae0d5309f73e27ba516b73e2 |
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+# 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 |