| # 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 |