database - Is the phrase "creating the DDL" a malapropism? -


database management sticky subject me, , result i'm sensible vocabulary when read on it. clarify phrase "create ddl" in following context?

jpa can use meta information create ddl when starts up. helpful development allows , running without delving sql needed create tables.

(source : http://www.alexecollins.com/tutorial-hibernate-jpa-part-1/)

here's understanding :

ddl stands "data definition language". refers subset of database language deals database structure. examples of ddl statements in sql create, alter or drop.

taking definition literally, creating ddl means defining generic statements affect database. doesn't makes sense: sql has ddl (the aforementioned create, alter, drop statements).

does "creating ddl" mean generating file has ddl statements required generate database?

the quotes says 'create the ddl' dissect 'create a ddl'. think there's big difference.

saying 'the ddl' shorthand 'the data definition language statements' (meaning sql necessary create schema). omitting word 'statements' (to me) forgivable contraction. using 'a ddl' has connotations of comparing 1 data definition language — sql isam.


Comments

Post a Comment

Popular posts from this blog

user interface - how to replace an ongoing process of image capture from another process call over the same ImageLabel in python's GUI TKinter -

i trying use following code create interactive gui changes color-space(hsv, rbg, grayscale etc) on event of button click. display opencv video in tkinter using multiprocessing being new python having problems multiprocessing , attempts on making gui change it's color space on button clicks hangs entire system. on it's implementation highly appreciated. thankyou. below code: import cv2 pil import image,imagetk import tkinter tk import numpy np multiprocessing import process , queue def quit_it(root,process): root.destroy() process.terminate() def black_andwhite(root,process): process.terminate p=process(target=capture_image, args=(5,queue, )) p.start() root.after(0, func=lambda: update_all(root, image_label, queue)) def update_image(image_label, queue): frame = queue.get() = image.fromarray(frame) b = imagetk.photoimage(image=a) image_label.configure(image=b) image_label._image_cache = b root.update() def update_all(root...
Read more

javascript - Restarting Supervisor and effect on FlaskSocketIO -

in index.html (html/javascript) have: $(document).ready(function(){ namespace = '/test'; var socket = io.connect('http://' + document.domain + ':' + location.port + namespace); socket.on('connect', function() { socket.emit('join', {room: 'venue_1'}); }); socket.on('my response', function(msg) { $('#log').append('<br>received #' + ': ' + msg.data); }); }); on server have: @socketio.on('connect', namespace='/test') def test_connect(): if session.get('venue_id'): emit('my response', {'data': 'connected'}) session.pop('venue_id', none) else: request.namespace.disconnect() @socketio.on('join', namespace='/test') def join(message): join_room(message['room']) room = message[...
Read more

php - Mongodb connectivity error -

<?php /** * connects mongodb server. * stops code execution on`enter code here` connection error. * * not need use file, place globally assign mongodb instance $db. * * define constants in config or here */ define('mdb_username', 'root'); define('mdb_password', 'asd'); define('mdb_host', 'localhost:80'); define('mdb_name', 'abc'); if (!class_exists('mongo')) { die("mongo class not existing. did install php mongodb extension?"); } try { $conn = new mongoclient("mongodb://".mdb_username.":".mdb_password."@".mdb_host."/".mdb_name); $conn->authenticate('root','gynadfehurbo'); $db = $conn->selectdb(mdb_name); } catch (mongoconnectionexception $e) { die($e->getmessage()); // in production might want turn off. } mongodb connectivity problem. while trying connect mongodb php got authentication problem .....
Read more