1# 2014 October 01 2# 3# The author disclaims copyright to this source code. In place of 4# 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# This file implements regression tests for SQLite library. The 12# focus of this file is testing the SQLITE_DIRECT_OVERFLOW_READ logic. 13# 14 15set testdir [file dirname $argv0] 16source $testdir/tester.tcl 17set testprefix ovfl 18 19# Populate table t2: 20# 21# CREATE TABLE t1(c1 TEXT, c2 TEXT); 22# 23# with 2000 rows. In each row, c2 spans multiple overflow pages. The text 24# value of c1 ranges in size from 1 to 2000 bytes. The idea is to create 25# at least one row where the first byte of c2 is also the first byte of 26# an overflow page. This was at one point exposing an obscure bug in the 27# SQLITE_DIRECT_OVERFLOW_READ logic. 28# 29do_test 1.1 { 30 set c2 [string repeat abcdefghij 200] 31 execsql { 32 PRAGMA cache_size = 10; 33 CREATE TABLE t1(c1 TEXT, c2 TEXT); 34 BEGIN; 35 } 36 for {set i 1} {$i <= 2000} {incr i} { 37 set c1 [string repeat . $i] 38 execsql { INSERT INTO t1 VALUES($c1, $c2) } 39 } 40 execsql COMMIT 41} {} 42 43do_execsql_test 1.2 { 44 SELECT sum(length(c2)) FROM t1; 45} [expr 2000 * 2000] 46 47finish_test 48