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125 lines
3.7 KiB
Tcl
125 lines
3.7 KiB
Tcl
# See the file LICENSE for redistribution information.
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#
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# Copyright (c) 2006, 2011 Oracle and/or its affiliates. All rights reserved.
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#
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# $Id$
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#
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# TEST test121
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# TEST Tests of multi-version concurrency control.
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# TEST
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# TEST MVCC and cursor adjustment.
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# TEST Set up a -snapshot cursor and position it in the middle
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# TEST of a database.
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# TEST Write to the database, both before and after the cursor,
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# TEST and verify that it stays on the same position.
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proc test121 { method {tnum "121"} args } {
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source ./include.tcl
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# This test needs its own env.
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set eindex [lsearch -exact $args "-env"]
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if { $eindex != -1 } {
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incr eindex
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set env [lindex $args $eindex]
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puts "Test$tnum skipping for env $env"
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return
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}
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# MVCC is not allowed with queue methods.
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if { [is_queue $method] == 1 } {
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puts "Test$tnum skipping for method $method"
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return
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}
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puts "\tTest$tnum ($method): MVCC and cursor adjustment."
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set args [convert_args $method $args]
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set omethod [convert_method $method]
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set encargs ""
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set args [split_encargs $args encargs]
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set filename "test.db"
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set pageargs ""
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set args [split_pageargs $args pageargs]
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# Create transactional env. Specifying -multiversion makes
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# all databases opened within the env -multiversion.
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env_cleanup $testdir
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puts "\tTest$tnum.a: Creating txn env."
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# Raise cachesize so this test focuses on cursor adjustment
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# and not on small cache issues.
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set cachesize [expr 2 * 1024 * 1024]
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set max_locks 2000
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set max_objects 2000
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set env [eval {berkdb_env -create -cachesize "0 $cachesize 1"}\
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-lock_max_locks $max_locks -lock_max_objects $max_objects\
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-txn -multiversion $encargs $pageargs -home $testdir]
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error_check_good env_open [is_valid_env $env] TRUE
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# Open database.
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puts "\tTest$tnum.b: Creating -multiversion db."
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set db [eval {berkdb_open} \
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-create -auto_commit -env $env $omethod $args $pageargs $filename]
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error_check_good db_open [is_valid_db $db] TRUE
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# Start transactions.
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puts "\tTest$tnum.c: Start txns with -snapshot."
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set t1 [$env txn -snapshot]
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set txn1 "-txn $t1"
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# Enter some data using txn1. Leave holes, by using keys
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# 2, 4, 6 ....
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set niter 10000
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set data DATA
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for { set i 1 } { $i <= $niter } { incr i } {
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set key [expr $i * 2]
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error_check_good t1_put [eval {$db put} $txn1 $key $data.$key] 0
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}
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error_check_good t1_commit [$t1 commit] 0
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# Open a read-only cursor.
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set t2 [$env txn -snapshot]
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set txn2 "-txn $t2"
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set cursor [eval {$db cursor} $txn2]
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error_check_good db_cursor [is_valid_cursor $cursor $db] TRUE
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# Walk the cursor halfway through the database.
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set i 1
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set halfway [expr $niter / 2]
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for { set ret [$cursor get -first] } \
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{ $i <= $halfway } \
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{ set ret [$cursor get -next] } {
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incr i
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}
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set currentkey [lindex [lindex $ret 0] 0]
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set currentdata [lindex [lindex $ret 0] 1]
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# Start a new transaction and use it to enter more data.
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# Verify that the cursor is not changed.
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puts "\tTest$tnum.c: Enter more data."
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set t1 [$env txn -snapshot]
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set txn1 "-txn $t1"
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# Enter more data, filling in the holes from the first
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# time around by using keys 1, 3, 5 .... Cursor should
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# stay on the same item.
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for { set i 1 } { $i <= $niter } { incr i } {
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set key [expr [expr $i * 2] - 1]
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error_check_good t1_put [eval {$db put} $txn1 $key $data.$key] 0
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set ret [$cursor get -current]
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set k [lindex [lindex $ret 0] 0]
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set d [lindex [lindex $ret 0] 1]
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error_check_good current_key $k $currentkey
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error_check_good current_data $d $currentdata
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}
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error_check_good t1_commit [$t1 commit] 0
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error_check_good cursor_close [$cursor close] 0
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error_check_good t2_commit [$t2 commit] 0
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# Clean up.
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error_check_good db_close [$db close] 0
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error_check_good env_close [$env close] 0
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}
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