danielk1977
145 lines
3.6 KiB
Plaintext
145 lines
3.6 KiB
Plaintext
# 2007 May 1
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# $Id: incrblob.test,v 1.4 2007/05/03 13:11:32 danielk1977 Exp $
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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do_test incrblob-1.1 {
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execsql {
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CREATE TABLE blobs(k PRIMARY KEY, v BLOB);
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INSERT INTO blobs VALUES('one', X'0102030405060708090A');
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INSERT INTO blobs VALUES('two', X'0A090807060504030201');
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}
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} {}
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do_test incrblob-1.2.1 {
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set ::blob [db incrblob blobs v 1]
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} {incrblob_1}
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do_test incrblob-1.2.2 {
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binary scan [read $::blob] c* data
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set data
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} {1 2 3 4 5 6 7 8 9 10}
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do_test incrblob-1.2.3 {
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seek $::blob 0
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puts -nonewline $::blob "1234567890"
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flush $::blob
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} {}
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do_test incrblob-1.2.4 {
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seek $::blob 0
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binary scan [read $::blob] c* data
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set data
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} {49 50 51 52 53 54 55 56 57 48}
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do_test incrblob-1.2.5 {
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close $::blob
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} {}
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do_test incrblob-1.2.6 {
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execsql {
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SELECT v FROM blobs WHERE rowid = 1;
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}
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} {1234567890}
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#--------------------------------------------------------------------
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# Test cases incrblob-1.3.X check that it is possible to read and write
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# regions of a blob that lie on overflow pages.
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#
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do_test incrblob-1.3.1 {
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set ::str "[string repeat . 10000]"
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execsql {
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INSERT INTO blobs(rowid, k, v) VALUES(3, 'three', $::str);
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}
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} {}
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do_test incrblob-1.3.2 {
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set ::blob [db incrblob blobs v 3]
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seek $::blob 8500
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read $::blob 10
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} {..........}
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do_test incrblob-1.3.3 {
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seek $::blob 8500
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puts -nonewline $::blob 1234567890
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} {}
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do_test incrblob-1.3.4 {
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seek $::blob 8496
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read $::blob 10
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} {....123456}
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do_test incrblob-1.3.10 {
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close $::blob
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} {}
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#------------------------------------------------------------------------
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# incrblob-2.*: Test that the following operations use ptrmap pages:
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#
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# * Reading near the end of a blob,
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# * Writing near the end of a blob (TODO),
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# * SELECT a column value that is located on an overflow page (TODO).
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#
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#
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proc nRead {db} {
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set bt [btree_from_db $db]
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array set stats [btree_pager_stats $bt]
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return $stats(read)
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}
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foreach AutoVacuumMode [list 0 1] {
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db close
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file delete -force test.db test.db-journal
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sqlite3 db test.db
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execsql "PRAGMA auto_vacuum = $AutoVacuumMode"
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do_test incrblob-2.$AutoVacuumMode.1 {
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set ::str [string repeat abcdefghij 2900]
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execsql {
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BEGIN;
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CREATE TABLE blobs(k PRIMARY KEY, v BLOB);
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DELETE FROM blobs;
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INSERT INTO blobs VALUES('one', $::str || randstr(500,500));
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COMMIT;
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}
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expr [file size test.db]/1024
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} [expr 31 + $AutoVacuumMode]
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do_test incrblob-2.$AutoVacuumMode.2 {
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execsql {
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PRAGMA auto_vacuum;
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}
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} $AutoVacuumMode
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do_test incrblob-2.$AutoVacuumMode.3 {
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# Open and close the db to make sure the page cache is empty.
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db close
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sqlite3 db test.db
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# Read the last 20 bytes of the blob via a blob handle.
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set ::blob [db incrblob blobs v 1]
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seek $::blob -20 end
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set ::fragment [read $::blob]
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close $::blob
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# If the database is not in auto-vacuum mode, the whole of
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# the overflow-chain must be scanned. In auto-vacuum mode,
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# sqlite uses the ptrmap pages to avoid reading the other pages.
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#
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nRead db
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} [expr $AutoVacuumMode ? 4 : 30]
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do_test incrblob-2.$AutoVacuumMode.3 {
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string range [db one {SELECT v FROM blobs}] end-19 end
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} $::fragment
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}
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finish_test
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