I know this page was not organized properly for a long time and it was hard for the users to get the most out of this page. So I thought of revamping the layout of this page and make it more users friendly. What I am doing here is moving the queries into various groups.
Please note that these examples are meant only to give you a head-start on the basic DQL syntax. For more information on DQL please refer to Content Server DQL Reference guide
DATEDIFF(date_part, date1, date2)
DATEDIFF function returns the number that represents the difference between given two dates. Valid values for date_part are year, month, week, and day and date1 is subtracted from date2.
This Query will return Object name of all the objects that has my_attributes as blank
In this example it will return only 10 records.
More to come soon
Please note that these examples are meant only to give you a head-start on the basic DQL syntax. For more information on DQL please refer to Content Server DQL Reference guide
Object type Modification
These scripts illustrates how to modify a Object type using DQLCreate a Simple Object Type
CREATE TYPE "mycustomtype" (firstname string(64),
country string(64) ,
age int,
height double,
phone string(10) REPEATING)
WITH SUPERTYPE "dm_document" PUBLISH(This script creates a object type mucustomtype with super type as dm_document )
Modify a Simple Object Type (Adding new Attributes)
ALTER TYPE "mycustomtype"
Add lastname string (64),
height double,
weight double
PUBLISH
Modify a Simple Object type (Modify existing attribute)
ALTER TYPE mycustomtype
MODIFY firstname string (121)
(There are many constrains on modifying an existing attribute Refer to DQL Manual for more information)Modity a Simple Object Type (Deleting an Attribute)
ALTER TYPE mycustomtype drop weight
Dropping an Object type
DROP Type "my_custom_object"
Delete All Objects of a Object type
DELETE my_custom_object (all) objects
To Find all attributes of an Object Type
DESCRIBE mycustomtype
Object Modification
These sample scripts illustrates various object manipulations.Create a new Object and set its attributes
CREATE
mycustomtype OBJECT
SET "firstname" = 'Hello World',
SET "country"= 'US',
SET "age"=20 SET phone [0]= '1111111111'
(In the above example phone is a repeated attribute, age is a integer and firstname and country are strings)
Update an existing Object’s Attribute
UPDATE
dm_document object
SET
object_name = 'new_name'
WHERE
object_name = 'old_name'
Adding a value to a existing object’s repeated attribute
UPDATE
dm_document objects
SET
keywords[0]='value'
WHERE
r_object_id='09xxxxxx'
Delete an Object from repository
DELETE
dm_document object
WHERE
object_name='object_name'
Selecting Object attributes
These are sample queries which will select one or more attributes from a Object and illustrates different where clausesSelect Single value attributes of a Object with single attribute in where clause
SELECT
r_object_id,
object_name
FROM
dm_document
WHERE
object_name='test'
Select a Repeated Attributes of a Object with repeated attribute in where clause
SELECT
r_version_label
FROM
dm_document
WHERE
any r_version_label in ('CURRENT')
To find all versions of an object (Usage of All)
SELECT
r_object_id,
r_version_label
FROM
dm_document (ALL)
WHERE
object_name='MyDocument'
Usage of Dates in Where Clause
SELECT
r_object_id,
object_name
FROM
dm_document
WHERE
r_modify_date > DATE('01/01/2008 00:00:00','MM/DD/YYYY hh:mm:ss') AND
r_modify_date < DATE('TODAY')(This will return object id and name of all the objects that was created between today and 01-01-2008)
Usage of DATEDIFF Function
SELECT
*
FROM
dm_document
WHERE
DATEDIFF(week, "r_creation_date" , DATE(TODAY))<=2
(This query will return all dm_documents that are created between today and the last 2 weeks)DATEDIFF(date_part, date1, date2)
DATEDIFF function returns the number that represents the difference between given two dates. Valid values for date_part are year, month, week, and day and date1 is subtracted from date2.
Usage of As in the Query
SELECT
object_name as name
FROM
dm_document
WHERE
r_object_id='09xxxxxx'
Usage of Distinct
SELECT DISTINCT
object_name
FROM
dm_documentThis returns all the unique object names of type dm_document.
Usage of NULLSTRING
SELECT
object_name
FROM
my_object_type
WHERE
my_attribute is NULLSTRING
This Query will return Object name of all the objects that has my_attributes as blank
SELECT
object_name
FROM
my_object_type
WHERE
my_attribute is not NULLSTRINGThis Query will return Object name of all the objects that has some values in my_attributes (non-blanks)
Query to search a document (with full text indexing )
SELECT
*
FROM
dm_document
SEARCH
document contains 'test'
Some Useful DQL Queries
These are collection of some useful queries.Finding all groups a user belongs to
SELECT
group_name
FROM
dm_group
WHERE
any users_names in ('user_name')
To find Folder Path of a Object
SELECT
r_folder_path
FROM
dm_folder
WHERE
r_object_id in(SELECT
i_folder_id
FROM
dm_document
WHERE
object_name='object_name')
To Find Objects those have Same (Duplicate) Name
SELECT
object_name,
count(*)
FROM
dm_document
GROUP BY object_name
HAVING count (*) > 1
ORDER BY
object_name
Find all locked object that were locked one day before
SELECT
r_object_id,
r_lock_date
FROM
dm_document
WHERE
r_lock_owner is not NULLSTRING and
r_lock_date is NOT NULLDATE and
r_lock_machine is not NULLSTRING and
DATEDIFF(day, r_lock_date, DATE(TODAY))<=1
ORDER BY
r_lock_date
To find all Users created after a specific day
To find all Users created after a specific day
SELECT
user_name,
user_os_name,
user_address,
user_group_name,
r_modify_date
FROM
dm_user
WHERE
r_modify_date > date('12/16/2008 00:00:00')
Query to find out the log location of Documentum Content server
SELECT
file_system_path
FROM
dm_location
WHERE
object_name='log'
DQL Hint Usages
These samples will illustrate usages of Various DQL hintsTo Return only specified number of Records
SELECT
*
FROM
dm_sysobject
ENABLE
(RETURN_TOP 10)This RETURN_TOP hint returns the number of records specified.
In this example it will return only 10 records.
More to come soon
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