From e9e71a45914a75cd84d473f9dbc2c2a4ce85413d Mon Sep 17 00:00:00 2001
From: Helmut Merz <helmutm@cy55.de>
Date: Thu, 6 Feb 2020 08:54:51 +0100
Subject: [PATCH] initial import

---
 pgsql/drop_tables.sql |   8 +++
 pgsql/init.sql        | 119 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 127 insertions(+)
 create mode 100644 pgsql/drop_tables.sql
 create mode 100644 pgsql/init.sql

diff --git a/pgsql/drop_tables.sql b/pgsql/drop_tables.sql
new file mode 100644
index 0000000..adc92da
--- /dev/null
+++ b/pgsql/drop_tables.sql
@@ -0,0 +1,8 @@
+-- drop tables in the correct order, avoiding constraint violations
+
+drop table triples;
+drop table events;
+drop table texts;
+drop table datatypes;
+drop table nodes;
+drop table namespaces;
diff --git a/pgsql/init.sql b/pgsql/init.sql
new file mode 100644
index 0000000..166d48b
--- /dev/null
+++ b/pgsql/init.sql
@@ -0,0 +1,119 @@
+-- tables
+
+CREATE TABLE namespaces (
+    id serial NOT NULL primary key,
+    iri text NOT NULL,
+    prefix text
+);
+
+CREATE TABLE nodes (
+    id bigserial NOT NULL primary key,
+    namespace bigint,
+    name text
+);
+
+CREATE TABLE datatypes (
+    id serial NOT NULL primary key,
+    dtname text NOT NULL,
+    tablename text,
+    node bigint
+);
+
+CREATE TABLE events (
+    id bigserial NOT NULL primary key,
+    tstamp timestamp NOT NULL,
+    node bigint
+);
+
+CREATE TABLE triples (
+    id bigserial NOT NULL primary key,
+    subject bigint NOT NULL,
+    predicate bigint NOT NULL,
+    datatype integer NOT NULL,
+    value bigint,
+    creation bigint NOT NULL,
+    deletion bigint
+);
+
+CREATE TABLE texts (
+    id bigserial NOT NULL primary key,
+    language bigint,
+    text text NOT NULL
+);
+
+ALTER TABLE nodes OWNER TO fco;
+ALTER TABLE datatypes OWNER TO fco;
+ALTER TABLE namespaces OWNER TO fco;
+ALTER TABLE triples OWNER TO fco;
+ALTER TABLE texts OWNER TO fco;
+
+-- data
+
+INSERT INTO namespaces (iri, prefix) 
+    VALUES ('http://cyberconcepts.org/cco-common#', 'cco');
+INSERT INTO namespaces (iri, prefix) 
+    VALUES ('http://www.w3.org/1999/02/22-rdf-syntax-ns#', 'rdf');
+INSERT INTO namespaces (iri, prefix) 
+    VALUES ('http://www.w3.org/2000/01/rdf-schema#', 'rdfs');
+
+INSERT INTO nodes (namespace, name) VALUES (1, 'Node');    -- 1
+INSERT INTO nodes (namespace, name) VALUES (2, 'type');    -- 2
+INSERT INTO nodes (namespace, name) VALUES (2, 'Property');-- 3
+INSERT INTO nodes (namespace, name) VALUES (2, 'Class');   -- 4
+INSERT INTO nodes (namespace, name) VALUES (1, 'Datatype');-- 5
+
+INSERT INTO datatypes (dtname, tablename) VALUES ('node', 'nodes'); -- 1
+INSERT INTO datatypes (dtname, tablename) VALUES ('string', 'texts'); -- 2
+INSERT INTO datatypes (dtname) VALUES ('int');                    -- 3
+
+INSERT INTO triples (subject, predicate, datatype, value) VALUES (1, 2, 1, 5);
+INSERT INTO triples (subject, predicate, datatype, value) VALUES (2, 2, 1, 3);
+INSERT INTO triples (subject, predicate, datatype, value) VALUES (3, 2, 1, 4);
+INSERT INTO triples (subject, predicate, datatype, value) VALUES (4, 2, 1, 4);
+INSERT INTO triples (subject, predicate, datatype, value) VALUES (5, 2, 1, 4);
+
+-- indexes
+
+CREATE INDEX idx_iri ON namespaces USING btree (iri);
+CREATE INDEX idx_prefix ON namespaces USING btree (prefix);
+
+CREATE INDEX idx_node_name ON nodes USING btree (namespace, name);
+
+CREATE INDEX fki_datatype_node ON datatypes USING btree (node);
+
+CREATE INDEX fki_event_node ON events USING btree (node);
+
+CREATE INDEX fki_datatype ON triples USING btree (datatype);
+CREATE INDEX fki_creation ON triples USING btree (creation);
+CREATE INDEX fki_deletion ON triples USING btree (deletion);
+CREATE INDEX idx_spo ON triples USING btree (subject, predicate, datatype, value);
+CREATE INDEX idx_po ON triples USING btree (predicate, datatype, value);
+CREATE INDEX idx_os ON triples USING btree (datatype, value, subject);
+
+CREATE INDEX fki_language ON texts USING btree (language);
+
+-- foreign key constraints
+
+ALTER TABLE ONLY nodes
+    ADD CONSTRAINT namespace FOREIGN KEY (namespace) REFERENCES namespaces(id);
+
+ALTER TABLE ONLY datatypes
+    ADD CONSTRAINT node FOREIGN KEY (node) REFERENCES nodes(id);
+
+ALTER TABLE ONLY events
+    ADD CONSTRAINT node FOREIGN KEY (node) REFERENCES nodes(id);
+
+ALTER TABLE ONLY triples
+    ADD CONSTRAINT subject FOREIGN KEY (subject) REFERENCES nodes(id);
+ALTER TABLE ONLY triples
+    ADD CONSTRAINT predicate FOREIGN KEY (predicate) REFERENCES nodes(id);
+ALTER TABLE ONLY triples
+    ADD CONSTRAINT datatype FOREIGN KEY (datatype) REFERENCES datatypes(id);
+ALTER TABLE ONLY triples
+    ADD CONSTRAINT creation FOREIGN KEY (creation) REFERENCES events(id);
+ALTER TABLE ONLY triples
+    ADD CONSTRAINT deletion FOREIGN KEY (deletion) REFERENCES events(id);
+
+ALTER TABLE ONLY texts
+    ADD CONSTRAINT language FOREIGN KEY (language) REFERENCES nodes(id);
+