LDAP Translator

The LDAP translator, known by the type name ldap, exposes an LDAP directory tree relationally with pushdown support for filtering via criteria. This is typically coupled with the LDAP resource adapter.

Execution Properties 

There are no import settings for the ldap translator; it also does not provide metadata.

Metadata Directives

String columns with a default value of "multivalued-concat" will concatinate all attribute values together in alphabetical order using a ? delimiter. If a multivalued attribute does not have a default value of "multivalued-concat", then any value may be returned.

Native Queries

LDAP procedures may optionally have native queries associated with them - see Parameterizable Native Queries. The operation prefix (select;, insert;, update;, delete; - see the native procedure logic below for more) must be present in the native-query, but it will not be issued as part of the query to the source.

CREATE FOREIGN PROCEDURE proc (arg1 integer, arg2 string) OPTIONS ("teiid_rel:native-query" 'search;context-name=corporate;filter=(&(objectCategory=person)(objectClass=user)(!cn=$2));count-limit=5;timeout=$1;search-scope=ONELEVEL_SCOPE;attributes=uid,cn') returns (col1 string, col2 string);

Parameter values have reserved characters escaped, but are otherwise directly substituted into the query.

Native Procedure

This feature is turned off by default because of the security risk this exposes to execute any command against the source. To enable this feature, override the translator property called "SupportsNativeQueries" to true. Look for Override Execution Properties above.

LDAP translator provides a procedure with name native that gives ability to execute any ad-hoc native LDAP queries directly against the source without any Teiid parsing or resolving. The metadata of this procedure's execution results are not known to the Teiid, and they are returned as object array. User can use ARRAYTABLE construct to build tabular output for consumption by client applications. Since there is no known direct query language for LDAP, Teiid exposes this procedure with a simple query structure as below

Search

SELECT x.* FROM (call pm1.native('search;context-name=corporate;filter=(objectClass=*);count-limit=5;timeout=6;search-scope=ONELEVEL_SCOPE;attributes=uid,cn')) w,
 ARRAYTABLE(w.tuple COLUMNS "uid" string , "cn" string) AS x

from the above code, the "search" keyword followed by below properties. Each property must be delimited by semi-colon (;) If a property contains a semi-colon (;), it should be escaped by another semi-colon - see alsoParameterizable Native Queries and the native-query procedure example above.

Delete

SELECT x.* FROM (call pm1.native('delete;uid=doe,ou=people,o=teiid.org')) w,
 ARRAYTABLE(w.tuple COLUMNS "updatecount" integer) AS x

form the above code, the "delete" keyword followed the "DN" string. All the string contents after the "delete;" used as DN.

Create or Update

SELECT x.* FROM
 (call pm1.native('create;uid=doe,ou=people,o=teiid.org;attributes=one,two,three', 'one', 2, 3.0)) w,
 ARRAYTABLE(w.tuple COLUMNS "update_count" integer) AS x

form the above code, the "create" keyword followed the "DN" string. All the string contents after the "create;" is used as DN. It also takes one property called "attributes" which is comma separated list of attributes. The values for each attribute is specified as separate argument to the "native" procedure.

Update is similar to create

SELECT x.* FROM
 (call pm1.native('update;uid=doe,ou=people,o=teiid.org;attributes=one,two,three', 'one', 2, 3.0)) w,
 ARRAYTABLE(w.tuple COLUMNS "update_count" integer) AS x

By default the name of the procedure that executes the queries directly is called native, however than can be set via an override execution property in the vdb.xml file.

JCA Resource Adapter

The resource adapter for this translator provided through "LDAP Data Source", Refer to Admin Guide for configuration.