oracle - SERVEROUTPUT shows results one after another execution -


when execute following trigger code compiled. after inserting data, serveroutput says '1 row inserted' trigger result ('user example has insrted data') didn't displayed.

then after execution of pl/sql previous trigger result appears on display. should solve issue?

here trigger , insertion command , results,

/ set serveroutput on;  create or replace trigger btr_superheros before insert on superheros each row enable  declare     v_user varchar2(30); begin     select user v_user dual;     dbms_output.enable();     dbms_output.put_line('user:' ||v_user||' has inserted data'); end; /

result - trigger btr_superheros compiled

insert superheros values('superman');

result - 1 row inserted. (didn't shows dbms_output)

you need set serveroutput on in client application (sql*plus, sql developer etc) in session run statement, otherwise won't know want fetch , display output buffer when statement completes. set server output on prior creating trigger client setting , doesn't set permanently trigger.

please confirm whether test case run single session, this:

sql*plus: release 12.1.0.1.0 production on tue aug 15 08:17:48 2017  copyright (c) 1982, 2013, oracle.  rights reserved.  last successful login time: tue aug 15 2017 08:14:08 +01:00  connected to: oracle database 12c enterprise edition release 12.1.0.1.0 - 64bit production partitioning, olap, advanced analytics , real application testing options  sql> set serveroutput on; sql> sql> create or replace trigger btr_superheros   2  before insert on superheros   3  each row   4  enable   5   6  declare   7      v_user varchar2(30);   8  begin   9      select user v_user dual;  10      dbms_output.enable();  11      dbms_output.put_line('user:' ||v_user||' has inserted data');  12  end;  13  /  trigger created.  sql> insert superheros values('superman'); user:william has inserted data  1 row created.

note not recommended call dbms_output.enable. the documentation:

you should avoid having application code invoke either disable procedure or enable procedure because subvert attempt of external tool sql*plus control whether or not display output.

you can assign values using assignment := operator instead of select into statement. trigger therefore written as:

create or replace trigger btr_superheros before insert on superheros each row enable declare     v_user user_users.username%type := sys_context('userenv', 'current_schema'); begin     dbms_output.put_line('user: ' ||v_user||' inserted value '''||:new.name||''''); end; /

Comments

  1. Anonymous23 January 2022 at 07:10

    Emperor Casino Online – Sportsbook Review 2021 - Legalbet
    Emperor 제왕카지노 Casino Online – Sportsbook Review vua nhà cái 2021 - Legalbet.co.kr offers the best sportsbook fun88 soikeotot in the country's borders.

    ReplyDelete

Post a Comment

Popular posts from this blog

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m...
Read more

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

sql server - Why does Linq-to-SQL add unnecessary COUNT()? -

here tables: create table customer ( cid int primary key, name varchar(32) ) create table ord ( oid int primary key, cid int foreign key references customer, address varchar(20) ) here's linq-to-sql statement: var aaa = c in db.customer select new { c, o = c.ord.tolist() }; and here's inexplicable query generated linq-to-sql: select [t0].[cid] [cid], [t0].[name] [name], [t1].[oid] [oid], [t1].[cid] [cid2], [t1].[address] [address], (select count(*) [dbo].[ord] [t2] [t2].[cid] = [t0].[cid]) [value] [dbo].[customer] [t0] left outer join [dbo].[ord] [t1] on [t1].[cid] = [t0].[cid] order [t0].[cid], [t1].[oid] i want understand how rid of count(*) part. it's entirely uncalled for! linq needs count(*) in order determine number of entries returned o = c.ord.tolist() .
Read more