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# 2015 February 16
#
# 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.
#
#***********************************************************************
#
if {![info exists testdir]} {
set testdir [file join [file dirname [info script]] .. .. test]
}
source $testdir/tester.tcl
source $testdir/lock_common.tcl
set ::testprefix rbu12
set setup_sql {
DROP TABLE IF EXISTS xx;
DROP TABLE IF EXISTS xy;
CREATE TABLE xx(a, b, c PRIMARY KEY);
INSERT INTO xx VALUES(1, 2, 3);
CREATE TABLE xy(a, b, c PRIMARY KEY);
ATTACH 'rbu.db' AS rbu;
DROP TABLE IF EXISTS data_xx;
CREATE TABLE rbu.data_xx(a, b, c, rbu_control);
INSERT INTO data_xx VALUES(4, 5, 6, 0);
INSERT INTO data_xx VALUES(7, 8, 9, 0);
CREATE TABLE rbu.data_xy(a, b, c, rbu_control);
INSERT INTO data_xy VALUES(10, 11, 12, 0);
DETACH rbu;
}
do_multiclient_test tn {
# Initialize a target (test.db) and rbu (rbu.db) database.
#
forcedelete rbu.db
sql1 $setup_sql
# Using connection 2, open a read transaction on the target database.
# RBU will still be able to generate "test.db-oal", but it will not be
# able to rename it to "test.db-wal".
#
do_test 1.$tn.1 {
sql2 { BEGIN; SELECT * FROM xx; }
} {1 2 3}
do_test 1.$tn.2 {
sqlite3rbu rbu test.db rbu.db
while 1 {
set res [rbu step]
if {$res!="SQLITE_OK"} break
}
set res
} {SQLITE_BUSY}
do_test 1.$tn.3 { sql2 { SELECT * FROM xx; } } {1 2 3}
do_test 1.$tn.4 { sql2 { SELECT * FROM xy; } } {}
do_test 1.$tn.5 {
list [file exists test.db-wal] [file exists test.db-oal]
} {0 1}
do_test 1.$tn.6 { sql2 COMMIT } {}
# The rbu object that hit the SQLITE_BUSY error above cannot be reused.
# It is stuck in a permanent SQLITE_BUSY state at this point.
#
do_test 1.$tn.7 { rbu step } {SQLITE_BUSY}
do_test 1.$tn.8 {
list [catch { rbu close } msg] $msg
} {1 SQLITE_BUSY}
do_test 1.$tn.9.1 { sql2 { BEGIN EXCLUSIVE } } {}
do_test 1.$tn.9.2 {
sqlite3rbu rbu test.db rbu.db
rbu step
} {SQLITE_BUSY}
do_test 1.$tn.9.3 {
list [catch { rbu close } msg] $msg
} {1 {SQLITE_BUSY - database is locked}}
do_test 1.$tn.9.4 { sql2 COMMIT } {}
sqlite3rbu rbu test.db rbu.db
do_test 1.$tn.10.1 { sql2 { BEGIN EXCLUSIVE } } {}
do_test 1.$tn.10.2 {
rbu step
} {SQLITE_BUSY}
do_test 1.$tn.10.3 {
list [catch { rbu close } msg] $msg
} {1 SQLITE_BUSY}
do_test 1.$tn.10.4 { sql2 COMMIT } {}
# A new rbu object can finish the work though.
#
do_test 1.$tn.11 {
sqlite3rbu rbu test.db rbu.db
rbu step
} {SQLITE_OK}
do_test 1.$tn.12 {
list [file exists test.db-wal] [file exists test.db-oal]
} {1 0}
do_test 1.$tn.13 {
while 1 {
set res [rbu step]
if {$res!="SQLITE_OK"} break
}
set res
} {SQLITE_DONE}
do_test 1.$tn.14 {
rbu close
} {SQLITE_DONE}
}
do_multiclient_test tn {
# Initialize a target (test.db) and rbu (rbu.db) database.
#
forcedelete rbu.db
sql1 $setup_sql
do_test 2.$tn.1 {
sqlite3rbu rbu test.db rbu.db
while {[file exists test.db-wal]==0} {
if {[rbu step]!="SQLITE_OK"} {error "problem here...."}
}
rbu close
} {SQLITE_OK}
do_test 2.$tn.2 { sql2 { BEGIN IMMEDIATE } } {}
do_test 2.$tn.3 {
sqlite3rbu rbu test.db rbu.db
rbu step
} {SQLITE_BUSY}
do_test 2.$tn.4 { list [catch { rbu close } msg] $msg } {1 SQLITE_BUSY}
do_test 2.$tn.5 {
sql2 { SELECT * FROM xx ; COMMIT }
} {1 2 3 4 5 6 7 8 9}
do_test 2.$tn.6 {
sqlite3rbu rbu test.db rbu.db
rbu step
rbu close
} {SQLITE_OK}
do_test 2.$tn.7 { sql2 { BEGIN EXCLUSIVE } } {}
do_test 2.$tn.8 {
sqlite3rbu rbu test.db rbu.db
rbu step
} {SQLITE_BUSY}
do_test 2.$tn.9 { list [catch { rbu close } msg] $msg } {1 SQLITE_BUSY}
do_test 2.$tn.10 {
sql2 { SELECT * FROM xx ; COMMIT }
} {1 2 3 4 5 6 7 8 9}
do_test 2.$tn.11 {
sqlite3rbu rbu test.db rbu.db
while {[rbu step]=="SQLITE_OK"} {}
rbu close
} {SQLITE_DONE}
}
#-------------------------------------------------------------------------
# Test that "PRAGMA data_version" works when an RBU client writes the
# database.
#
do_multiclient_test tn {
# Initialize a target (test.db) and rbu (rbu.db) database.
#
forcedelete rbu.db
sql1 $setup_sql
# Check the initial database contains table "xx" with a single row.
# Also save the current values of "PRAGMA data-version" for [db1]
# and [db2].
#
do_test 2.$tn.1 {
list [sql1 { SELECT count(*) FROM xx }] [sql2 { SELECT count(*) FROM xx }]
} {1 1}
set V1 [sql1 {PRAGMA data_version}]
set V2 [sql2 {PRAGMA data_version}]
# Check the values of data-version have not magically changed.
#
do_test 2.$tn.2 {
list [sql1 {PRAGMA data_version}] [sql2 {PRAGMA data_version}]
} [list $V1 $V2]
# Start stepping the RBU. From the point of view of [db1] and [db2], the
# data-version values remain unchanged until the database contents are
# modified. At which point the values are incremented.
#
sqlite3rbu rbu test.db rbu.db
set x 0
while {[db one {SELECT count(*) FROM xx}]==1} {
do_test 2.$tn.3.[incr x] {
list [sql1 {PRAGMA data_version}] [sql2 {PRAGMA data_version}]
} [list $V1 $V2]
rbu step
}
do_test 2.$tn.5.1 { expr {$V1 < [sql1 {PRAGMA data_version}]} } 1
do_test 2.$tn.5.2 { expr {$V2 < [sql2 {PRAGMA data_version}]} } 1
# Check the db contents is as expected.
#
do_test 2.$tn.4 {
list [sql1 {SELECT count(*) FROM xx}] [sql2 {SELECT count(*) FROM xx}]
} {3 3}
set V1 [sql1 {PRAGMA data_version}]
set V2 [sql2 {PRAGMA data_version}]
# Finish applying the RBU (i.e. do the incremental checkpoint). Check that
# this does not cause the data-version values to change.
#
while {[rbu step]=="SQLITE_OK"} { }
rbu close
do_test 2.$tn.6 {
list [sql1 {PRAGMA data_version}] [sql2 {PRAGMA data_version}]
} [list $V1 $V2]
}
finish_test
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