/trunk/test/laststmtchanges.test |
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# |
# 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. |
# |
#*********************************************************************** |
# |
# Tests to make sure that values returned by changes() and total_changes() |
# are updated properly, especially inside triggers |
# |
# Note 1: changes() remains constant within a statement and only updates |
# once the statement is finished (triggers count as part of |
# statement). |
# Note 2: changes() is changed within the context of a trigger much like |
# last_insert_rowid() (see lastinsert.test), but is restored once |
# the trigger exits. |
# Note 3: changes() is not changed by a change to a view (since everything |
# is done within instead of trigger context). |
# |
# $Id: laststmtchanges.test,v 1.7 2008/10/27 13:59:34 danielk1977 Exp $ |
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set testdir [file dirname $argv0] |
source $testdir/tester.tcl |
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# ---------------------------------------------------------------------------- |
# 1.x - basic tests (no triggers) |
|
# changes() set properly after insert |
do_test laststmtchanges-1.1 { |
catchsql { |
create table t0 (x); |
insert into t0 values (1); |
insert into t0 values (1); |
insert into t0 values (2); |
insert into t0 values (2); |
insert into t0 values (1); |
insert into t0 values (1); |
insert into t0 values (1); |
insert into t0 values (2); |
select changes(), total_changes(); |
} |
} {0 {1 8}} |
|
# changes() set properly after update |
do_test laststmtchanges-1.2 { |
catchsql { |
update t0 set x=3 where x=1; |
select changes(), total_changes(); |
} |
} {0 {5 13}} |
|
# There was some goofy change-counting logic in sqlite3_exec() that |
# appears to have been left over from SQLite version 2. This test |
# makes sure it has been removed. |
# |
do_test laststmtchanges-1.2.1 { |
db cache flush |
sqlite3_exec_printf db {update t0 set x=4 where x=3; select 1;} {} |
execsql {select changes()} |
} {5} |
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# changes() unchanged within an update statement |
do_test laststmtchanges-1.3 { |
execsql {update t0 set x=3 where x=4} |
catchsql { |
update t0 set x=x+changes() where x=3; |
select count() from t0 where x=8; |
} |
} {0 5} |
|
# changes() set properly after update on table where no rows changed |
do_test laststmtchanges-1.4 { |
catchsql { |
update t0 set x=77 where x=88; |
select changes(); |
} |
} {0 0} |
|
# changes() set properly after delete from table |
do_test laststmtchanges-1.5 { |
catchsql { |
delete from t0 where x=2; |
select changes(); |
} |
} {0 3} |
|
# All remaining tests involve triggers. Skip them if triggers are not |
# supported in this build. |
# |
ifcapable {!trigger} { |
finish_test |
return |
} |
|
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# ---------------------------------------------------------------------------- |
# 2.x - tests with after insert trigger |
|
# changes() changed properly after insert into table containing after trigger |
do_test laststmtchanges-2.1 { |
set ::tc [db total_changes] |
catchsql { |
create table t1 (k integer primary key); |
create table t2 (k integer primary key, v1, v2); |
create trigger r1 after insert on t1 for each row begin |
insert into t2 values (NULL, changes(), NULL); |
update t0 set x=x; |
update t2 set v2=changes(); |
end; |
insert into t1 values (77); |
select changes(); |
} |
} {0 1} |
|
# changes() unchanged upon entry into after insert trigger |
do_test laststmtchanges-2.2 { |
catchsql { |
select v1 from t2; |
} |
} {0 3} |
|
# changes() changed properly by update within context of after insert trigger |
do_test laststmtchanges-2.3 { |
catchsql { |
select v2 from t2; |
} |
} {0 5} |
|
# Total changes caused by firing the trigger above: |
# |
# 1 from "insert into t1 values(77)" + |
# 1 from "insert into t2 values (NULL, changes(), NULL);" + |
# 5 from "update t0 set x=x;" + |
# 1 from "update t2 set v2=changes();" |
# |
do_test laststmtchanges-2.4 { |
expr [db total_changes] - $::tc |
} {8} |
|
# ---------------------------------------------------------------------------- |
# 3.x - tests with after update trigger |
|
# changes() changed properly after update into table containing after trigger |
do_test laststmtchanges-3.1 { |
catchsql { |
drop trigger r1; |
delete from t2; delete from t2; |
create trigger r1 after update on t1 for each row begin |
insert into t2 values (NULL, changes(), NULL); |
delete from t0 where oid=1 or oid=2; |
update t2 set v2=changes(); |
end; |
update t1 set k=k; |
select changes(); |
} |
} {0 1} |
|
# changes() unchanged upon entry into after update trigger |
do_test laststmtchanges-3.2 { |
catchsql { |
select v1 from t2; |
} |
} {0 0} |
|
# changes() changed properly by delete within context of after update trigger |
do_test laststmtchanges-3.3 { |
catchsql { |
select v2 from t2; |
} |
} {0 2} |
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# ---------------------------------------------------------------------------- |
# 4.x - tests with before delete trigger |
|
# changes() changed properly on delete from table containing before trigger |
do_test laststmtchanges-4.1 { |
catchsql { |
drop trigger r1; |
delete from t2; delete from t2; |
create trigger r1 before delete on t1 for each row begin |
insert into t2 values (NULL, changes(), NULL); |
insert into t0 values (5); |
update t2 set v2=changes(); |
end; |
delete from t1; |
select changes(); |
} |
} {0 1} |
|
# changes() unchanged upon entry into before delete trigger |
do_test laststmtchanges-4.2 { |
catchsql { |
select v1 from t2; |
} |
} {0 0} |
|
# changes() changed properly by insert within context of before delete trigger |
do_test laststmtchanges-4.3 { |
catchsql { |
select v2 from t2; |
} |
} {0 1} |
|
# ---------------------------------------------------------------------------- |
# 5.x - complex tests with temporary tables and nested instead of triggers |
# These tests cannot run if the library does not have view support enabled. |
|
ifcapable view&&tempdb { |
|
do_test laststmtchanges-5.1 { |
catchsql { |
drop table t0; drop table t1; drop table t2; |
create temp table t0(x); |
create temp table t1 (k integer primary key); |
create temp table t2 (k integer primary key); |
create temp view v1 as select * from t1; |
create temp view v2 as select * from t2; |
create temp table n1 (k integer primary key, n); |
create temp table n2 (k integer primary key, n); |
insert into t0 values (1); |
insert into t0 values (2); |
insert into t0 values (1); |
insert into t0 values (1); |
insert into t0 values (1); |
insert into t0 values (2); |
insert into t0 values (2); |
insert into t0 values (1); |
create temp trigger r1 instead of insert on v1 for each row begin |
insert into n1 values (NULL, changes()); |
update t0 set x=x*10 where x=1; |
insert into n1 values (NULL, changes()); |
insert into t1 values (NEW.k); |
insert into n1 values (NULL, changes()); |
update t0 set x=x*10 where x=0; |
insert into v2 values (100+NEW.k); |
insert into n1 values (NULL, changes()); |
end; |
create temp trigger r2 instead of insert on v2 for each row begin |
insert into n2 values (NULL, changes()); |
insert into t2 values (1000+NEW.k); |
insert into n2 values (NULL, changes()); |
update t0 set x=x*100 where x=0; |
insert into n2 values (NULL, changes()); |
delete from t0 where x=2; |
insert into n2 values (NULL, changes()); |
end; |
insert into t1 values (77); |
select changes(); |
} |
} {0 1} |
|
do_test laststmtchanges-5.2 { |
catchsql { |
delete from t1 where k=88; |
select changes(); |
} |
} {0 0} |
|
do_test laststmtchanges-5.3 { |
catchsql { |
insert into v1 values (5); |
select changes(); |
} |
} {0 0} |
|
do_test laststmtchanges-5.4 { |
catchsql { |
select n from n1; |
} |
} {0 {0 5 1 0}} |
|
do_test laststmtchanges-5.5 { |
catchsql { |
select n from n2; |
} |
} {0 {0 1 0 3}} |
|
} ;# ifcapable view |
|
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# ---------------------------------------------------------------------------- |
# 6.x - Test "DELETE FROM <table>" in the absence of triggers |
# |
do_test laststmtchanges-6.1 { |
execsql { |
CREATE TABLE t3(a, b, c); |
INSERT INTO t3 VALUES(1, 2, 3); |
INSERT INTO t3 VALUES(4, 5, 6); |
} |
} {} |
do_test laststmtchanges-6.2 { |
execsql { |
BEGIN; |
DELETE FROM t3; |
SELECT changes(); |
} |
} {2} |
do_test laststmtchanges-6.3 { |
execsql { |
ROLLBACK; |
BEGIN; |
DELETE FROM t3 WHERE a IS NOT NULL; |
SELECT changes(); |
} |
} {2} |
do_test laststmtchanges-6.4 { |
execsql { |
ROLLBACK; |
CREATE INDEX t3_i1 ON t3(a); |
BEGIN; |
DELETE FROM t3; |
SELECT changes(); |
} |
} {2} |
do_test laststmtchanges-6.5 { |
execsql { ROLLBACK } |
set nTotalChange [execsql {SELECT total_changes()}] |
expr 0 |
} {0} |
do_test laststmtchanges-6.6 { |
execsql { |
SELECT total_changes(); |
DELETE FROM t3; |
SELECT total_changes(); |
} |
} [list $nTotalChange [expr $nTotalChange+2]] |
|
finish_test |