| # 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 |