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-rw-r--r--servers/slapd/back-sql/rdbms_depend/pgsql/backsql_create.sql50
-rw-r--r--servers/slapd/back-sql/rdbms_depend/pgsql/backsql_drop.sql4
-rw-r--r--servers/slapd/back-sql/rdbms_depend/pgsql/slapd.conf35
-rw-r--r--servers/slapd/back-sql/rdbms_depend/pgsql/testdb_create.sql55
-rw-r--r--servers/slapd/back-sql/rdbms_depend/pgsql/testdb_data.sql21
-rw-r--r--servers/slapd/back-sql/rdbms_depend/pgsql/testdb_drop.sql13
-rw-r--r--servers/slapd/back-sql/rdbms_depend/pgsql/testdb_metadata.sql146
7 files changed, 324 insertions, 0 deletions
diff --git a/servers/slapd/back-sql/rdbms_depend/pgsql/backsql_create.sql b/servers/slapd/back-sql/rdbms_depend/pgsql/backsql_create.sql
new file mode 100644
index 0000000..a4baa70
--- /dev/null
+++ b/servers/slapd/back-sql/rdbms_depend/pgsql/backsql_create.sql
@@ -0,0 +1,50 @@
+drop table ldap_oc_mappings;
+drop sequence ldap_oc_mappings_id_seq;
+create table ldap_oc_mappings
+ (
+ id serial not null primary key,
+ name varchar(64) not null,
+ keytbl varchar(64) not null,
+ keycol varchar(64) not null,
+ create_proc varchar(255),
+ delete_proc varchar(255),
+ expect_return int not null
+);
+
+drop table ldap_attr_mappings;
+drop sequence ldap_attr_mappings_id_seq;
+create table ldap_attr_mappings
+ (
+ id serial not null primary key,
+ oc_map_id integer not null references ldap_oc_mappings(id),
+ name varchar(255) not null,
+ sel_expr varchar(255) not null,
+ sel_expr_u varchar(255),
+ from_tbls varchar(255) not null,
+ join_where varchar(255),
+ add_proc varchar(255),
+ delete_proc varchar(255),
+ param_order int not null,
+ expect_return int not null
+);
+
+drop table ldap_entries;
+drop sequence ldap_entries_id_seq;
+create table ldap_entries
+ (
+ id serial not null primary key,
+ dn varchar(255) not null,
+ oc_map_id integer not null references ldap_oc_mappings(id),
+ parent int NOT NULL,
+ keyval int NOT NULL,
+ UNIQUE ( oc_map_id, keyval ),
+ UNIQUE ( dn )
+);
+
+drop table ldap_entry_objclasses;
+create table ldap_entry_objclasses
+ (
+ entry_id integer not null references ldap_entries(id),
+ oc_name varchar(64)
+ );
+
diff --git a/servers/slapd/back-sql/rdbms_depend/pgsql/backsql_drop.sql b/servers/slapd/back-sql/rdbms_depend/pgsql/backsql_drop.sql
new file mode 100644
index 0000000..eff0a9e
--- /dev/null
+++ b/servers/slapd/back-sql/rdbms_depend/pgsql/backsql_drop.sql
@@ -0,0 +1,4 @@
+DROP TABLE ldap_entry_objclasses;
+DROP TABLE ldap_attr_mappings;
+DROP TABLE ldap_entries;
+DROP TABLE ldap_oc_mappings;
diff --git a/servers/slapd/back-sql/rdbms_depend/pgsql/slapd.conf b/servers/slapd/back-sql/rdbms_depend/pgsql/slapd.conf
new file mode 100644
index 0000000..70a8dee
--- /dev/null
+++ b/servers/slapd/back-sql/rdbms_depend/pgsql/slapd.conf
@@ -0,0 +1,35 @@
+# $OpenLDAP$
+#
+# See slapd.conf(5) for details on configuration options.
+# This file should NOT be world readable.
+#
+include /usr/local/etc/openldap/schema/core.schema
+include /usr/local/etc/openldap/schema/cosine.schema
+include /usr/local/etc/openldap/schema/inetorgperson.schema
+
+# Define global ACLs to disable default read access.
+
+# Do not enable referrals until AFTER you have a working directory
+# service AND an understanding of referrals.
+#referral ldap://root.openldap.org
+
+pidfile /usr/local/var/slapd.pid
+argsfile /usr/local/var/slapd.args
+
+#######################################################################
+# sql database definitions
+#######################################################################
+
+database sql
+suffix "o=sql,c=RU"
+rootdn "cn=root,o=sql,c=RU"
+rootpw secret
+dbname PostgreSQL
+dbuser postgres
+dbpasswd postgres
+insentry_stmt "insert into ldap_entries (id,dn,oc_map_id,parent,keyval) values ((select max(id)+1 from ldap_entries),?,?,?,?)"
+upper_func "upper"
+strcast_func "text"
+concat_pattern "?||?"
+has_ldapinfo_dn_ru no
+
diff --git a/servers/slapd/back-sql/rdbms_depend/pgsql/testdb_create.sql b/servers/slapd/back-sql/rdbms_depend/pgsql/testdb_create.sql
new file mode 100644
index 0000000..e1c57e7
--- /dev/null
+++ b/servers/slapd/back-sql/rdbms_depend/pgsql/testdb_create.sql
@@ -0,0 +1,55 @@
+drop table persons;
+drop sequence persons_id_seq;
+create table persons (
+ id serial not null primary key,
+ name varchar(255) not null,
+ surname varchar(255) not null,
+ password varchar(64)
+);
+
+drop table institutes;
+drop sequence institutes_id_seq;
+create table institutes (
+ id serial not null primary key,
+ name varchar(255)
+);
+
+drop table documents;
+drop sequence documents_id_seq;
+create table documents (
+ id serial not null primary key,
+ title varchar(255) not null,
+ abstract varchar(255)
+);
+
+drop table authors_docs;
+create table authors_docs (
+ pers_id int not null,
+ doc_id int not null,
+ primary key ( pers_id, doc_id )
+);
+
+drop table phones;
+drop sequence phones_id_seq;
+create table phones (
+ id serial not null primary key,
+ phone varchar(255) not null ,
+ pers_id int not null
+);
+
+drop table certs;
+drop sequence certs_id_seq;
+CREATE TABLE certs (
+ id int not null primary key,
+ cert bytea not null,
+ pers_id int not null
+);
+
+drop table referrals;
+drop sequence referrals_id_seq;
+create table referrals (
+ id serial not null primary key,
+ name varchar(255) not null,
+ url varchar(255) not null
+);
+
diff --git a/servers/slapd/back-sql/rdbms_depend/pgsql/testdb_data.sql b/servers/slapd/back-sql/rdbms_depend/pgsql/testdb_data.sql
new file mode 100644
index 0000000..0e661d4
--- /dev/null
+++ b/servers/slapd/back-sql/rdbms_depend/pgsql/testdb_data.sql
@@ -0,0 +1,21 @@
+insert into institutes (id,name) values (1,'Example');
+
+insert into persons (id,name,surname,password) values (1,'Mitya','Kovalev','mit');
+insert into persons (id,name,surname) values (2,'Torvlobnor','Puzdoy');
+insert into persons (id,name,surname) values (3,'Akakiy','Zinberstein');
+
+insert into phones (id,phone,pers_id) values (1,'332-2334',1);
+insert into phones (id,phone,pers_id) values (2,'222-3234',1);
+insert into phones (id,phone,pers_id) values (3,'545-4563',2);
+
+insert into documents (id,abstract,title) values (1,'abstract1','book1');
+insert into documents (id,abstract,title) values (2,'abstract2','book2');
+
+insert into authors_docs (pers_id,doc_id) values (1,1);
+insert into authors_docs (pers_id,doc_id) values (1,2);
+insert into authors_docs (pers_id,doc_id) values (2,1);
+
+insert into referrals (id,name,url) values (1,'Referral','ldap://localhost:9012/');
+
+insert into certs (id,cert,pers_id) values (1,decode('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','base64'),3);
+
diff --git a/servers/slapd/back-sql/rdbms_depend/pgsql/testdb_drop.sql b/servers/slapd/back-sql/rdbms_depend/pgsql/testdb_drop.sql
new file mode 100644
index 0000000..c061ff8
--- /dev/null
+++ b/servers/slapd/back-sql/rdbms_depend/pgsql/testdb_drop.sql
@@ -0,0 +1,13 @@
+DROP TABLE persons;
+DROP TABLE institutes;
+DROP TABLE documents;
+DROP TABLE authors_docs;
+DROP TABLE phones;
+DROP TABLE referrals;
+DROP FUNCTION create_person ();
+DROP FUNCTION update_person_cn (varchar, int);
+DROP FUNCTION add_phone (varchar, int);
+DROP FUNCTION create_doc ();
+DROP FUNCTION create_o ();
+DROP FUNCTION create_referral ();
+
diff --git a/servers/slapd/back-sql/rdbms_depend/pgsql/testdb_metadata.sql b/servers/slapd/back-sql/rdbms_depend/pgsql/testdb_metadata.sql
new file mode 100644
index 0000000..d645cf2
--- /dev/null
+++ b/servers/slapd/back-sql/rdbms_depend/pgsql/testdb_metadata.sql
@@ -0,0 +1,146 @@
+-- mappings
+
+-- objectClass mappings: these may be viewed as structuralObjectClass, the ones that are used to decide how to build an entry
+-- id a unique number identifying the objectClass
+-- name the name of the objectClass; it MUST match the name of an objectClass that is loaded in slapd's schema
+-- keytbl the name of the table that is referenced for the primary key of an entry
+-- keycol the name of the column in "keytbl" that contains the primary key of an entry; the pair "keytbl.keycol" uniquely identifies an entry of objectClass "id"
+-- create_proc a procedure to create the entry
+-- delete_proc a procedure to delete the entry; it takes "keytbl.keycol" of the row to be deleted
+-- expect_return a bitmap that marks whether create_proc (1) and delete_proc (2) return a value or not
+insert into ldap_oc_mappings (id,name,keytbl,keycol,create_proc,delete_proc,expect_return) values (1,'inetOrgPerson','persons','id','SELECT create_person()','DELETE FROM persons WHERE id=?',0);
+
+insert into ldap_oc_mappings (id,name,keytbl,keycol,create_proc,delete_proc,expect_return) values (2,'document','documents','id','SELECT create_doc()','DELETE FROM documents WHERE id=?',0);
+
+insert into ldap_oc_mappings (id,name,keytbl,keycol,create_proc,delete_proc,expect_return) values (3,'organization','institutes','id','SELECT create_o()','DELETE FROM institutes WHERE id=?',0);
+
+insert into ldap_oc_mappings (id,name,keytbl,keycol,create_proc,delete_proc,expect_return) values (4,'referral','referrals','id','SELECT create_referral()','DELETE FROM referrals WHERE id=?',0);
+
+-- attributeType mappings: describe how an attributeType for a certain objectClass maps to the SQL data.
+-- id a unique number identifying the attribute
+-- oc_map_id the value of "ldap_oc_mappings.id" that identifies the objectClass this attributeType is defined for
+-- name the name of the attributeType; it MUST match the name of an attributeType that is loaded in slapd's schema
+-- sel_expr the expression that is used to select this attribute (the "select <sel_expr> from ..." portion)
+-- from_tbls the expression that defines the table(s) this attribute is taken from (the "select ... from <from_tbls> where ..." portion)
+-- join_where the expression that defines the condition to select this attribute (the "select ... where <join_where> ..." portion)
+-- add_proc a procedure to insert the attribute; it takes the value of the attribute that is added, and the "keytbl.keycol" of the entry it is associated to
+-- delete_proc a procedure to delete the attribute; it takes the value of the attribute that is added, and the "keytbl.keycol" of the entry it is associated to
+-- param_order a mask that marks if the "keytbl.keycol" value comes before or after the value in add_proc (1) and delete_proc (2)
+-- expect_return a mask that marks whether add_proc (1) and delete_proc(2) are expected to return a value or not
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (1,1,'cn','text(persons.name||'' ''||persons.surname)','persons',NULL,'SELECT update_person_cn(?,?)','SELECT 1 FROM persons WHERE persons.name=? AND persons.id=? AND 1=0',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (2,1,'telephoneNumber','phones.phone','persons,phones','phones.pers_id=persons.id','SELECT add_phone(?,?)','DELETE FROM phones WHERE phone=? AND pers_id=?',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (3,1,'givenName','persons.name','persons',NULL,'UPDATE persons SET name=? WHERE id=?','UPDATE persons SET name='''' WHERE (name=? OR name='''') AND id=?',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (4,1,'sn','persons.surname','persons',NULL,'UPDATE persons SET surname=? WHERE id=?','UPDATE persons SET surname='''' WHERE (surname=? OR surname='''') AND id=?',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (5,1,'userPassword','persons.password','persons','persons.password IS NOT NULL','UPDATE persons SET password=? WHERE id=?','UPDATE persons SET password=NULL WHERE password=? AND id=?',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (6,1,'seeAlso','seeAlso.dn','ldap_entries AS seeAlso,documents,authors_docs,persons','seeAlso.keyval=documents.id AND seeAlso.oc_map_id=2 AND authors_docs.doc_id=documents.id AND authors_docs.pers_id=persons.id',NULL,'DELETE from authors_docs WHERE authors_docs.doc_id=(SELECT documents.id FROM documents,ldap_entries AS seeAlso WHERE seeAlso.keyval=documents.id AND seeAlso.oc_map_id=2 AND seeAlso.dn=?) AND authors_docs.pers_id=?',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (7,2,'description','documents.abstract','documents',NULL,'UPDATE documents SET abstract=? WHERE id=?','UPDATE documents SET abstract='''' WHERE abstract=? AND id=?',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (8,2,'documentTitle','documents.title','documents',NULL,'UPDATE documents SET title=? WHERE id=?','UPDATE documents SET title='''' WHERE title=? AND id=?',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (9,2,'documentAuthor','documentAuthor.dn','ldap_entries AS documentAuthor,documents,authors_docs,persons','documentAuthor.keyval=persons.id AND documentAuthor.oc_map_id=1 AND authors_docs.doc_id=documents.id AND authors_docs.pers_id=persons.id','INSERT INTO authors_docs (pers_id,doc_id) VALUES ((SELECT ldap_entries.keyval FROM ldap_entries WHERE upper(?)=upper(ldap_entries.dn)),?)','DELETE FROM authors_docs WHERE authors_docs.pers_id=(SELECT ldap_entries.keyval FROM ldap_entries WHERE upper(?)=upper(ldap_entries.dn)) AND authors_docs.doc_id=?',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (10,2,'documentIdentifier','''document ''||text(documents.id)','documents',NULL,NULL,'SELECT 1 FROM documents WHERE title=? AND id=? AND 1=0',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (11,3,'o','institutes.name','institutes',NULL,'UPDATE institutes SET name=? WHERE id=?','UPDATE institutes SET name='''' WHERE name=? AND id=?',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (12,3,'dc','lower(institutes.name)','institutes,ldap_entries AS dcObject,ldap_entry_objclasses AS auxObjectClass','institutes.id=dcObject.keyval AND dcObject.oc_map_id=3 AND dcObject.id=auxObjectClass.entry_id AND auxObjectClass.oc_name=''dcObject''',NULL,'SELECT 1 FROM institutes WHERE lower(name)=? AND id=? and 1=0',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (13,4,'ou','referrals.name','referrals',NULL,'UPDATE referrals SET name=? WHERE id=?','SELECT 1 FROM referrals WHERE name=? AND id=? and 1=0',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (14,4,'ref','referrals.url','referrals',NULL,'UPDATE referrals SET url=? WHERE id=?','SELECT 1 FROM referrals WHERE url=? and id=? and 1=0',3,0);
+
+insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return) values (15,1,'userCertificate','certs.cert','persons,certs','certs.pers_id=persons.id',NULL,NULL,3,0);
+
+-- entries mapping: each entry must appear in this table, with a unique DN rooted at the database naming context
+-- id a unique number > 0 identifying the entry
+-- dn the DN of the entry, in "pretty" form
+-- oc_map_id the "ldap_oc_mappings.id" of the main objectClass of this entry (view it as the structuralObjectClass)
+-- parent the "ldap_entries.id" of the parent of this objectClass; 0 if it is the "suffix" of the database
+-- keyval the value of the "keytbl.keycol" defined for this objectClass
+insert into ldap_entries (id,dn,oc_map_id,parent,keyval) values (1,'dc=example,dc=com',3,0,1);
+
+insert into ldap_entries (id,dn,oc_map_id,parent,keyval) values (2,'cn=Mitya Kovalev,dc=example,dc=com',1,1,1);
+
+insert into ldap_entries (id,dn,oc_map_id,parent,keyval) values (3,'cn=Torvlobnor Puzdoy,dc=example,dc=com',1,1,2);
+
+insert into ldap_entries (id,dn,oc_map_id,parent,keyval) values (4,'cn=Akakiy Zinberstein,dc=example,dc=com',1,1,3);
+
+insert into ldap_entries (id,dn,oc_map_id,parent,keyval) values (5,'documentTitle=book1,dc=example,dc=com',2,1,1);
+
+insert into ldap_entries (id,dn,oc_map_id,parent,keyval) values (6,'documentTitle=book2,dc=example,dc=com',2,1,2);
+
+insert into ldap_entries (id,dn,oc_map_id,parent,keyval) values (7,'ou=Referral,dc=example,dc=com',4,1,1);
+
+-- objectClass mapping: entries that have multiple objectClass instances are listed here with the objectClass name (view them as auxiliary objectClass)
+-- entry_id the "ldap_entries.id" of the entry this objectClass value must be added
+-- oc_name the name of the objectClass; it MUST match the name of an objectClass that is loaded in slapd's schema
+insert into ldap_entry_objclasses (entry_id,oc_name) values (1,'dcObject');
+
+insert into ldap_entry_objclasses (entry_id,oc_name) values (4,'pkiUser');
+
+insert into ldap_entry_objclasses (entry_id,oc_name) values (7,'extensibleObject');
+
+-- procedures
+-- these procedures are specific for this RDBMS and are used in mapping objectClass and attributeType creation/modify/deletion
+create function create_person () returns int
+as '
+ select setval (''persons_id_seq'', (select case when max(id) is null then 1 else max(id) end from persons));
+ insert into persons (id,name,surname)
+ values ((select case when max(id) is null then 1 else nextval(''persons_id_seq'') end from persons),'''','''');
+ select max(id) from persons
+' language 'sql';
+
+create function update_person_cn (varchar, int) returns int
+as '
+ update persons set name = (
+ select case
+ when position('' '' in $1) = 0 then $1
+ else substr($1, 1, position('' '' in $1) - 1)
+ end
+ ),surname = (
+ select case
+ when position('' '' in $1) = 0 then ''''
+ else substr($1, position('' '' in $1) + 1)
+ end
+ ) where id = $2;
+ select $2 as return
+' language 'sql';
+
+create function add_phone (varchar, int) returns int
+as '
+ select setval (''phones_id_seq'', (select case when max(id) is null then 1 else max(id) end from phones));
+ insert into phones (id,phone,pers_id)
+ values (nextval(''phones_id_seq''),$1,$2);
+ select max(id) from phones
+' language 'sql';
+
+create function create_doc () returns int
+as '
+ select setval (''documents_id_seq'', (select case when max(id) is null then 1 else max(id) end from documents));
+ insert into documents (id,title,abstract)
+ values ((select case when max(id) is null then 1 else nextval(''documents_id_seq'') end from documents),'''','''');
+ select max(id) from documents
+' language 'sql';
+
+create function create_o () returns int
+as '
+ select setval (''institutes_id_seq'', (select case when max(id) is null then 1 else max(id) end from institutes));
+ insert into institutes (id,name)
+ values ((select case when max(id) is null then 1 else nextval(''institutes_id_seq'') end from institutes),'''');
+ select max(id) from institutes
+' language 'sql';
+
+create function create_referral () returns int
+as '
+ select setval (''referrals_id_seq'', (select case when max(id) is null then 1 else max(id) end from referrals));
+ insert into referrals (id,name,url)
+ values ((select case when max(id) is null then 1 else nextval(''referrals_id_seq'') end from referrals),'''','''');
+ select max(id) from referrals
+' language 'sql';
+