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d201074611
out of order". (final version) Now instead of binding Item_trigger_field to TABLE objects during trigger definition parsing at table open, we perform pass through special list of all such objects in trigger. This allows easily check all references to fields in old/new version of row in trigger during execution of CREATE TRIGGER statement (this is more courtesy for users since we can't check everything anyway). We also report that such reference is bad by returning error from Item_trigger_field::fix_fields() method (instead of setup_field()) This means that if trigger is broken we will bark during trigger execution instead of trigger definition parsing at table open. (i.e. now we allow to open tables with broken triggers).
228 lines
5.7 KiB
Text
228 lines
5.7 KiB
Text
#
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# Basic triggers test
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#
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--disable_warnings
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drop table if exists t1, t2;
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drop view if exists v1;
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--enable_warnings
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create table t1 (i int);
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# let us test some very simple trigger
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create trigger trg before insert on t1 for each row set @a:=1;
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set @a:=0;
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select @a;
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insert into t1 values (1);
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select @a;
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drop trigger t1.trg;
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# let us test simple trigger reading some values
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create trigger trg before insert on t1 for each row set @a:=new.i;
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insert into t1 values (123);
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select @a;
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drop trigger t1.trg;
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drop table t1;
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# Let us test before insert trigger
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# Such triggers can be used for setting complex default values
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create table t1 (i int not null, j int);
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delimiter |;
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create trigger trg before insert on t1 for each row
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begin
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if isnull(new.j) then
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set new.j:= new.i * 10;
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end if;
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end|
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insert into t1 (i) values (1)|
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insert into t1 (i,j) values (2, 3)|
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select * from t1|
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drop trigger t1.trg|
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drop table t1|
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delimiter ;|
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# After insert trigger
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# Useful for aggregating data
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create table t1 (i int not null primary key);
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create trigger trg after insert on t1 for each row
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set @a:= if(@a,concat(@a, ":", new.i), new.i);
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set @a:="";
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insert into t1 values (2),(3),(4),(5);
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select @a;
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drop trigger t1.trg;
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drop table t1;
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# Before update trigger
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# (In future we will achieve this via proper error handling in triggers)
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create table t1 (aid int not null primary key, balance int not null default 0);
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insert into t1 values (1, 1000), (2,3000);
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delimiter |;
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create trigger trg before update on t1 for each row
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begin
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declare loc_err varchar(255);
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if abs(new.balance - old.balance) > 1000 then
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set new.balance:= old.balance;
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set loc_err := concat("Too big change for aid = ", new.aid);
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set @update_failed:= if(@update_failed, concat(@a, ":", loc_err), loc_err);
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end if;
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end|
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set @update_failed:=""|
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update t1 set balance=1500|
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select @update_failed;
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select * from t1|
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drop trigger t1.trg|
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drop table t1|
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delimiter ;|
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# After update trigger
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create table t1 (i int);
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insert into t1 values (1),(2),(3),(4);
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create trigger trg after update on t1 for each row
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set @total_change:=@total_change + new.i - old.i;
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set @total_change:=0;
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update t1 set i=3;
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select @total_change;
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drop trigger t1.trg;
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drop table t1;
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# Before delete trigger
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# This can be used for aggregation too :)
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create table t1 (i int);
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insert into t1 values (1),(2),(3),(4);
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create trigger trg before delete on t1 for each row
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set @del_sum:= @del_sum + old.i;
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set @del_sum:= 0;
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delete from t1 where i <= 3;
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select @del_sum;
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drop trigger t1.trg;
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drop table t1;
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# After delete trigger.
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# Just run out of imagination.
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create table t1 (i int);
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insert into t1 values (1),(2),(3),(4);
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create trigger trg after delete on t1 for each row set @del:= 1;
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set @del:= 0;
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delete from t1 where i <> 0;
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select @del;
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drop trigger t1.trg;
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drop table t1;
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# Several triggers on one table
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create table t1 (i int, j int);
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delimiter |;
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create trigger trg1 before insert on t1 for each row
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begin
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if new.j > 10 then
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set new.j := 10;
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end if;
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end|
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create trigger trg2 before update on t1 for each row
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begin
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if old.i % 2 = 0 then
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set new.j := -1;
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end if;
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end|
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create trigger trg3 after update on t1 for each row
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begin
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if new.j = -1 then
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set @fired:= "Yes";
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end if;
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end|
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delimiter ;|
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set @fired:="";
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insert into t1 values (1,2),(2,3),(3,14);
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select @fired;
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select * from t1;
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update t1 set j= 20;
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select @fired;
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select * from t1;
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drop trigger t1.trg1;
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drop trigger t1.trg2;
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drop trigger t1.trg3;
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drop table t1;
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#
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# Test of wrong column specifiers in triggers
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#
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create table t1 (i int);
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--error 1363
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create trigger trg before insert on t1 for each row set @a:= old.i;
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--error 1363
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create trigger trg before delete on t1 for each row set @a:= new.i;
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--error 1362
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create trigger trg before update on t1 for each row set old.i:=1;
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--error 1363
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create trigger trg before delete on t1 for each row set new.i:=1;
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--error 1362
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create trigger trg after update on t1 for each row set new.i:=1;
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--error 1054
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create trigger trg before update on t1 for each row set new.j:=1;
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--error 1054
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create trigger trg before update on t1 for each row set @a:=old.j;
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#
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# Let us test various trigger creation errors
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#
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#
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--error 1146
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create trigger trg before insert on t2 for each row set @a:=1;
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create trigger trg before insert on t1 for each row set @a:=1;
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--error 1359
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create trigger trg after insert on t1 for each row set @a:=1;
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--error 1359
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create trigger trg2 before insert on t1 for each row set @a:=1;
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drop trigger t1.trg;
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--error 1360
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drop trigger t1.trg;
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create view v1 as select * from t1;
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--error 1361
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create trigger trg before insert on v1 for each row set @a:=1;
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drop view v1;
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drop table t1;
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create temporary table t1 (i int);
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--error 1361
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create trigger trg before insert on t1 for each row set @a:=1;
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drop table t1;
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#
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# Tests for various trigger-related bugs
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#
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# Test for bug #5887 "Triggers with string literals cause errors".
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# New .FRM parser was not handling escaped strings properly.
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create table t1 (x1col char);
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create trigger tx1 before insert on t1 for each row set new.x1col = 'x';
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insert into t1 values ('y');
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drop trigger t1.tx1;
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drop table t1;
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#
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# Test for bug #5890 "Triggers fail for DELETE without WHERE".
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# If we are going to delete all rows in table but DELETE triggers exist
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# we should perform row-by-row deletion instead of using optimized
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# delete_all_rows() method.
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#
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create table t1 (i int) engine=myisam;
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insert into t1 values (1), (2);
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create trigger trg1 before delete on t1 for each row set @del_before:= @del_before + old.i;
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create trigger trg2 after delete on t1 for each row set @del_after:= @del_after + old.i;
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set @del_before:=0, @del_after:= 0;
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delete from t1;
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select @del_before, @del_after;
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drop trigger t1.trg1;
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drop trigger t1.trg2;
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drop table t1;
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