mirror of https://github.com/sqlite/sqlite
254 lines
6.4 KiB
Plaintext
254 lines
6.4 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 1.5 2007/05/03 16:31:26 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.*:
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#
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# Test that the following operations use ptrmap pages to reduce
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# unnecessary reads:
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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, and
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# * SELECT a column value that is located on an overflow page.
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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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proc nWrite {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(write)
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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, i INTEGER);
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DELETE FROM blobs;
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INSERT INTO blobs VALUES('one', $::str || randstr(500,500), 45);
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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.4 {
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string range [db one {SELECT v FROM blobs}] end-19 end
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} $::fragment
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do_test incrblob-2.$AutoVacuumMode.5 {
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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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# Write the second-to-last 20 bytes of the blob via a blob handle.
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#
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set ::blob [db incrblob blobs v 1]
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seek $::blob -40 end
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puts -nonewline $::blob "1234567890abcdefghij"
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flush $::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 $AutoVacuumMode ? 4 : 30]
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# Pages 1 (the write-counter) and 32 (the blob data) were written.
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do_test incrblob-2.$AutoVacuumMode.6 {
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close $::blob
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nWrite db
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} 2
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do_test incrblob-2.$AutoVacuumMode.7 {
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string range [db one {SELECT v FROM blobs}] end-39 end-20
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} "1234567890abcdefghij"
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do_test incrblob-2.$AutoVacuumMode.8 {
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# Open and close the db to make sure the page cache is empty.
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db close
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sqlite3 db test.db
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execsql { SELECT i FROM blobs }
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} {45}
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do_test incrblob-2.$AutoVacuumMode.9 {
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nRead db
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} [expr $AutoVacuumMode ? 4 : 30]
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}
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#------------------------------------------------------------------------
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# incrblob-3.*:
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#
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# Test the outcome of trying to write to a read-only blob handle.
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#
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# TODO: The following test only tests the tcl interface, not the
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# underlying sqlite3 interface. Need to find some other method
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# to call sqlite3_blob_write() on a readonly handle...
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#
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do_test incrblob-3.1 {
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set ::blob [db incrblob -readonly blobs v 1]
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seek $::blob -40 end
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read $::blob 20
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} "1234567890abcdefghij"
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do_test incrblob-3.2 {
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seek $::blob 0
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set rc [catch {
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puts -nonewline $::blob "helloworld"
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} msg]
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list $rc $msg
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} "1 {channel \"$::blob\" wasn't opened for writing}"
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#------------------------------------------------------------------------
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# incrblob-4.*:
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#
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# Try a couple of error conditions:
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#
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# 4.1 - Attempt to open a row that does not exist.
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# 4.2 - Attempt to open a column that does not exist.
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# 4.3 - Attempt to open a table that does not exist.
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# 4.4 - Attempt to open a database that does not exist.
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#
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do_test incrblob-4.1 {
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set rc [catch {
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set ::blob [db incrblob blobs v 2]
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} msg ]
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list $rc $msg
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} {1 {no such rowid: 2}}
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do_test incrblob-4.2 {
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set rc [catch {
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set ::blob [db incrblob blobs blue 1]
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} msg ]
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list $rc $msg
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} {1 {no such column: "blue"}}
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do_test incrblob-4.3 {
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set rc [catch {
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set ::blob [db incrblob nosuchtable blue 1]
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} msg ]
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list $rc $msg
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} {1 {no such table: main.nosuchtable}}
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do_test incrblob-4.4 {
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set rc [catch {
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set ::blob [db incrblob nosuchdb blobs v 1]
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} msg ]
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list $rc $msg
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} {1 {no such table: nosuchdb.blobs}}
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finish_test
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