| # 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). |
| # |
| |
| set testdir [file dirname $argv0] |
| source $testdir/tester.tcl |
| |
| # ---------------------------------------------------------------------------- |
| # 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}} |
| |
| # changes() unchanged within an update statement |
| do_test laststmtchanges-1.3 { |
| 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 |
| } |
| |
| |
| # ---------------------------------------------------------------------------- |
| # 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} |
| |
| # ---------------------------------------------------------------------------- |
| # 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 |
| |
| finish_test |
