Skip to content
GitLab
Explore
Sign in
Primary navigation
Search or go to…
Project
RQL
Manage
Activity
Members
Labels
Plan
Issues
Issue boards
Milestones
Wiki
Code
Merge requests
Repository
Branches
Commits
Tags
Repository graph
Compare revisions
Snippets
Build
Pipelines
Jobs
Pipeline schedules
Artifacts
Deploy
Releases
Container Registry
Model registry
Operate
Environments
Monitor
Incidents
Service Desk
Analyze
Value stream analytics
Contributor analytics
CI/CD analytics
Repository analytics
Model experiments
Help
Help
Support
GitLab documentation
Compare GitLab plans
Community forum
Contribute to GitLab
Provide feedback
Keyboard shortcuts
?
Snippets
Groups
Projects
Show more breadcrumbs
cubicweb
RQL
Commits
01e7c96e33d7
Commit
01e7c96e33d7
authored
16 years ago
by
Nicolas Chauvat
Browse files
Options
Downloads
Patches
Plain Diff
[doc] translation of the rql tutorial
parent
134e91f704a5
No related branches found
No related tags found
No related merge requests found
Changes
2
Hide whitespace changes
Inline
Side-by-side
Showing
2 changed files
doc/tutorial_en.txt
+239
-0
239 additions, 0 deletions
doc/tutorial_en.txt
doc/tutoriel_fr.txt
+1
-1
1 addition, 1 deletion
doc/tutoriel_fr.txt
with
240 additions
and
1 deletion
doc/tutorial_en.txt
0 → 100644
+
239
−
0
View file @
01e7c96e
.. -*- coding: utf-8 -*-
.. _tutorielRQL:
==================================
"Relation Query Language" tutorial
==================================
Let's discover RQL with examples.
Schema
------
We will assume the following data model.
:Person:
::
name varchar(64) NOT NULL
firstname varchar(64)
sex char(1) DEFAULT 'M'
title varchar(128)
email varchar(128)
web varchar(128)
tel integer
birthdate date
:Company:
::
name varchar(64)
web varchar(128)
tel varchar(15)
adr varchar(128)
cp varchar(12)
city varchar(32)
:Workcase:
::
title varchar(128)
ref varchar(12)
:Comment:
::
diem date
type char(1)
para varchar(512)
with relationships:
::
Person works_for Company
Person commented_by Comment
Company commented_by Comment
Person concerned_by Workcase
Company concerned_by Workcase
Toutes les entités ont un attribut supplémentaire 'eid', permettant
d'identifier chaque instance de manière unique.
De plus si les métadonnées sont utilisées, vous disposez pour chaque
type d'entité des relations "creation_date", "modification_date" dont
l'objet est une entité de type Dates (il y a un "s" pour ne pas avoir
de conflit avec le type de base "date"), ainsi que de la relation
"owned_by" dont l'objet est une entité de type Euser. Les schemas
standards de ces types d'entités sont les suivants :
:Dates:
::
day date
:Euser:
::
login varchar(64) not null
firstname varchar(64)
surname varchar(64)
password password
role choice('admin','user','anonymous') default 'user'
email varchar(128)
web varchar(128)
birthday date
Enfin, il existe la relation spéciale "is" permettant de spécifier le
type d'une variable.
Essentials
----------
1. *Alls persons*
::
Person X ;
or
Any X WHERE X is Person ;
2. *The company namend Logilab*
::
Company S WHERE S name 'Logilab' ;
3. *All entities with a name starting with 'Log'*
::
Any S WHERE S name LIKE 'Log%' ;
or
Any S WHERE S name ~= 'Log%' ;
This query can return entities of type Person and Company.
4. *All persons working for a company named Logilab*
::
Person P WHERE P works_for S, S name "Logilab" ;
or
Person P WHERE P works_for S AND S name "Logilab" ;
or
Person P WHERE P works_for "Logilab" ;
La dernière forme fonctionne car "nom" est le premier attribut des
entités de type "Société" XXX nico: toujours vrai ?
5. *Companies named Caesium or Logilab*
::
Company S WHERE S name IN ('Logilab','Caesium') ;
or
Company S WHERE S name 'Logilab' OR S name 'Caesium' ;
6. *All companies that are not named Caesium or Logilab*
::
Company S WHERE NOT S name IN ('Logilab','Caesium') ;
or
Company S WHERE NOT S name 'Logilab' AND NOT S name 'Caesium' ;
7. *All entities commented by the entity number 43*
::
Any X WHERE X commented_by N, N eid 43 ;
8. *All persons sorted by birth date in descending order*
::
Any X WHERE X is Person, X birthdate D ORDERBY D DESC ;
9. *All persons grouped by company*
::
Person X WHERE X works_for S GROUPBY S,X ;
On note qu'il faut définir une variable pour s'en servir pour le
groupage. De plus les variables séléctionnées doivent être groupées
(mais les variables groupées ne doivent pas forcément être sélectionnées).
XXX nico: c'est peu utile comme requête
Exemples avancés
----------------
1. *All persons that have an empty name (i.e NULL)*
::
Person P WHERE P name NULL ;
2. *All persons that do not work for a company*
::
Person P WHERE NOT P works_for S ;
3. *All the companies that the person named 'toto' does not work for*
::
Company S WHERE NOT P works_for S , P name 'toto' ;
or
Company S WHERE NOT 'toto' works_for S ;
4. *All the entities modified yesterday and today*
::
Any X WHERE X modification_date <= today, X modification_date >= today - 1
5. *All the comments without type that required action within 7 days, sorted by date*
::
Any N, D where N is Comment, N type NULL, N diem D, N diem >= today,
N diem < today + 7 ORDERBY D
6. *All persons that have homonyms (each name listed only once)*
::
Person X,Y where X name NX, Y name NX, X eid XE, Y eid > XE
This diff is collapsed.
Click to expand it.
doc/tutoriel_fr.txt
+
1
−
1
View file @
01e7c96e
...
@@ -208,7 +208,7 @@
...
@@ -208,7 +208,7 @@
::
::
Personne P WHERE NOT
p
travaille_pour S ;
Personne P WHERE NOT
P
travaille_pour S ;
3. *Toutes les sociétés où la personne nommée toto ne travaille pas*
3. *Toutes les sociétés où la personne nommée toto ne travaille pas*
...
...
This diff is collapsed.
Click to expand it.
Preview
0%
Loading
Try again
or
attach a new file
.
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Save comment
Cancel
Please
register
or
sign in
to comment