AryaWu/sqlite

1# 2016 March 32#3# The author disclaims copyright to this source code.  In place of4# a legal notice, here is a blessing:5#6#    May you do good and not evil.7#    May you find forgiveness for yourself and forgive others.8#    May you share freely, never taking more than you give.9#10#***********************************************************************11 12set testdir [file dirname $argv0]13source $testdir/tester.tcl14set testprefix tempdb215 16db close17sqlite3 db ""18 19set unlocked unlocked20if {$::TEMP_STORE>=2} { set unlocked unknown }21 22proc int2str {i} { string range [string repeat "$i." 450] 0 899 }23db func int2str int2str24 25#-------------------------------------------------------------------------26#27#  1.1: Write a big transaction to the db. One so large that it forces28#       the file to be created and the cache flushed to disk on COMMIT.29#30#  1.2: Write a small transaction - one small enough that it remains in31#       memory on COMMIT. All the pages of table [t1] are now dirty.32#33#  1.3: Delete the contents of [t1]. This moves all of its leaves to the34#       free-list and causes the btree layer to call PagerDontWrite() on35#       each of them.36#37#       Then do a big update on table [t2]. So big that the former leaves38#       of [t1] are forced out of the cache. Then roll back the transaction.39#       If the PagerDontWrite() calls are honoured and the data is not written40#       to disk, the update made in test 1.2 will be lost at this point. Or, if41#       they are ignored (as they should be for temp databases), the update42#       will be safely written out to disk before the cache entries are43#       discarded.44#45do_execsql_test 1.1 {46  PRAGMA page_size=1024;47  PRAGMA cache_size=50;48 49  BEGIN;50    CREATE TABLE t1(a INTEGER PRIMARY KEY, b);51    INSERT INTO t1 VALUES(1, int2str(1));52    INSERT INTO t1 VALUES(2, int2str(1));53    INSERT INTO t1 VALUES(3, int2str(1));54 55    CREATE TABLE t2(a INTEGER PRIMARY KEY, b);56    WITH c(x) AS ( VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100 ) 57    INSERT INTO t2 SELECT x, int2str(x) FROM c;58  COMMIT;59 60  PRAGMA lock_status;61} [list main $unlocked temp closed]62 63do_execsql_test 1.2 {64  UPDATE t1 SET b=int2str(2);65  SELECT b=int2str(2) FROM t166} {1 1 1}67 68do_execsql_test 1.3 {69  BEGIN;70    DELETE FROM t1;71    UPDATE t2 SET b=int2str(a+1);72  ROLLBACK;73}74 75do_execsql_test 1.4 {76  SELECT b=int2str(2) FROM t177} {1 1 1}78 79#-------------------------------------------------------------------------80db close81sqlite3 db ""82db func int2str int2str83 84do_execsql_test 2.0 {85  PRAGMA cache_size = -100;86  CREATE TABLE t1(a INTEGER PRIMARY KEY, b);87  WITH c(x) AS ( VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100 ) 88    INSERT INTO t1 SELECT x, int2str(x) FROM c;89}90 91do_execsql_test 2.1 {92  INSERT INTO t1 VALUES(10001, int2str(1001) || int2str(1001) || int2str(1001));93}94 95do_execsql_test 2.2 {96  SELECT b FROM t1 WHERE a = 10001;97} "[int2str 1001][int2str 1001][int2str 1001]"98 99finish_test100