Hi Jean , Hi Satheesh,
what i really want to know is the available syntax how to change data or add data in the actual insert.
This is why i need the syntax to do this.
Here are my tests . as you can see nearly everything is working , which leads me to the conclusion that there must be another way to set the values for the current insert statement.

CREATE TABLE "ATV_BASE"
( "AT_ID_"        NUMERIC(10, 0) NOT NULL,
  "V_ID_"        NUMERIC(10, 0) NOT NULL,
 ....
  "N_DATE"        DATE DEFAULT '1970-01-01' NOT NULL,
  "XN_BID_"        NUMERIC(10, 0) DEFAULT 0 NOT NULL,
  "CHG_DATE_"        DATE DEFAULT '1970-01-01' NOT NULL,
  "XCHG_BID_"        NUMERIC(10, 0) DEFAULT 0 NOT NULL,
 ..
PRIMARY KEY ("AT_ID_", "V_ID_")
);

ij> create trigger atv_base1
  no cascade before
  insert on ATV_BASE
  referencing new as new
  for each row mode db2sql
  set new.n_date_ = CURRENT_DATE; /*here i want to set a date . I will do it in a default value*/
ERROR 42X01: Syntax error: Encountered "set" at line 6, column 3.
ij> create trigger atv_base2
  no cascade before
  insert on ATV_BASE
  referencing new as new
  for each row mode db2sql
  set new.xn_bid_ = (select id_ from btab where bez_ = user); /*dependant on the user value which is char i want to get a number out of a separate table which i need for the current insert otherwise insert,which caused the trigger will fail*/  
ERROR 42X01: Syntax error: Encountered "set" at line 6, column 3.

What i would like to have is to use this in one trigger.

mfg
Joachim Stumpf   DB2 Technical presales support
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Please respond to "Derby Discussion" <derby-user@db.apache.org>

To:        Derby Discussion <derby-user@db.apache.org>
cc:        
Subject:        Re: Derby and Triggers


Hi Jean,

You are correct about Derby triggers not being able to execute a procedure. Since I have seen this requested many times before and since this is the only way to have multiple SQL statements in a trigger (that modify data), I have filed
Derby-551 enhancement request. I believe Derby can be easily changed to support stored procedures in a trigger.

Satheesh

Jean T. Anderson wrote:


Next, a trigger can't execute a procedure, but it can execute a function; however, functions are "read only" (can't update data in the database). Here's one very simple example that shows the syntax for a trigger that invokes a function implemented in Java:

http://mail-archives.apache.org/mod_mbox/db-derby-user/200506.mbox/%3c42A0E031.60003@bristowhill.com%3e

Often when I'm looking for an example on how to do something, I look at the functional tests:

http://svn.apache.org/viewcvs.cgi/db/derby/code/trunk/java/testing/org/apache/derbyTesting/functionTests/tests/lang/

If none of this information helps, please feel free to post more questions.  I'm interested in this area and will try to assemble a more helpful writeup on the topic that consolidates the information in all these various posts.

-jean



Joachim G Stumpf wrote:


Hi,
i have to convert SQL Syntax to DERBY from Interbase.
I use Derby 10 and customer uses 10.1 . So i downloaded Alpha version of reference Doku.

Now i have to define a trigger

Original
CREATE TRIGGER "ATV_tr1" FOR "tab1"
ACTIVE BEFORE INSERT POSITION 0
as
declare variable bId integer;
begin
       select id_        from tab2 where bez_ = user into :bId;
       if ( bId IS NULL ) then bId = 0;
       new.xn_b_id_ = bId;
       new.xad_b_id_ = bId;
       new.neu_date_    = 'now';
       new.aend_date_   = 'now';
end
;

I found db2 syntax which is similar to Derby.

create trigger atv_basis
 no cascade before
 insert on ADM_TR_VORGABE_BASIS
 referencing new as new
 for each row mode db2sql
 begin atomic
          set new.neu_datum_    = CURRENT_DATE;
       set new.aend_datum_   = CURRENT_DATE;

end;

This isn't working too.
Can somebody help me out?


mfg
Joachim Stumpf   DB2 Technical presales support
Tel.: (+49) -7034-15-3276     Fax:   (+49)-7034-15-3400
Internet:
stumpfj@de.ibm.com    Mobil: (+49)-172-733 9453

Developersite:
http://www.ibm.com/software/data/developer
Forum:
http://www-106.ibm.com/developerworks/forums/dw_forum.jsp?forum=492&cat=19