# 2014 October 01 # # 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. # #*********************************************************************** # This file implements regression tests for SQLite library. The # focus of this file is testing the SQLITE_DIRECT_OVERFLOW_READ logic. # set testdir [file dirname $argv0] source $testdir/tester.tcl set testprefix ovfl # Populate table t2: # # CREATE TABLE t1(c1 TEXT, c2 TEXT); # # with 2000 rows. In each row, c2 spans multiple overflow pages. The text # value of c1 ranges in size from 1 to 2000 bytes. The idea is to create # at least one row where the first byte of c2 is also the first byte of # an overflow page. This was at one point exposing an obscure bug in the # SQLITE_DIRECT_OVERFLOW_READ logic. # do_test 1.1 { set c2 [string repeat abcdefghij 200] execsql { PRAGMA cache_size = 10; CREATE TABLE t1(c1 TEXT, c2 TEXT); BEGIN; } for {set i 1} {$i <= 2000} {incr i} { set c1 [string repeat . $i] execsql { INSERT INTO t1 VALUES($c1, $c2) } } execsql COMMIT } {} do_execsql_test 1.2 { SELECT sum(length(c2)) FROM t1; } [expr 2000 * 2000] finish_test