Behavior of the TRIGGERS of the LEVEL LINE

Hello Experts,

I have an isue with the Trigger sequence.

in books or on the net I read that the trigger firing order is

before the declaration

|

before the line

|

statement (provide the event like insert, update)

|

After the rank

|

After statement

.

but I had different behaviors in the following conditions

(1) example 1 (my assumption, statement-level trigger works very well)

I create a table tab_stmt (a key number of priimary)

I have two triggers on it

(i) create or replace trigger bef_stmt

Before Insert on ytab_stmt

Start

DBMS... ("before stmt');

end;

(II) create or replace trigger aft_stmt

AfterInsert on tab_stmt

Start

DBMS... ("after stmt');

end;

When I insert a value in the tab_stmt table

What value = 10

My o/p is - before stmt

After stmt

When I insert again value = 10 (forcing in the error, and then only prior to the declaration of the trigger, then error)

o/p is - before stmt

This means that my explanation is fuine

(2) but for row level trigger that I did not get a correct output or maybe I'm not theoretically correct.

example of

create a table tab_row (a key number of priimary)

triggers

(i) create or replace trigger bef_row

Before Insert on tab_row

for each line

Start

DBMS... ("before the line");

end;

(II) create or replace trigger aft_row

After Insert on tab_row

for each line

Start

DBMS... ("after the line");

end;

Now, when I insert value

(1) insert into tab_row values (10)

o/p == > before line

After the rank

(2) but now twist is here.

According to me, if I insert again value = 10

(1) then is should give error but before giving it must first will trigger before row-level trigger

as I am in the event of the trigger shot as before line-> State-> after the rank

but when I insert - Insert tab_row (10)

it fires before row-level trigger, but gives me an error.

can you please explain this behavior of row-level trigger to make my concept will be clear?

Thanks in advance

Hello

It works fine for me.

I created the table and triggers exactly as you posted.

The I ran this:

FAST = 1 INSERT =.

INSERT INTO tab_row (a) VALUES (10);

FAST = 2ND INSERTION =.

INSERT INTO tab_row (a) VALUES (10);

The output I got was:

= 1 INSERT =.
line of BEF
back row

1 line of creation.

= 2ND INSERTION =.
line of BEF
INSERT INTO tab_row (a) VALUES (10)
*
ERROR on line 1:
ORA-00001: unique constraint (SYSTEM. SYS_C00121927) violated

As you can see, "bef row" appears right before the error has been reported.

What software do you use?  I tried this on 12.1.0.1.0, Oracle with SQL * Plus 11.2.0.1.0.

Tags: Database

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